1|1|2001-02-16 17:31:50|Mike|Mode switch knob for 210X needed.|
Hello,

My name is Mike Melland, W9WIS. I'm an avid amateur radio operator,
operating qrp from field locatioins as well as qro/qrp from my home
shack. I'm also an ARRL Technical Specialist for the Wisconsin
Section of ARRL and I have quite a bit of test instrumentation at my
disposal at home.

I recently became an owner of an Atlas 210X with noise blanker (later
version). The rig is in excellent condition and works well and I
plan to utilize the rig for now in my camper. For some reason the
knob on the mose switch had been changed by a previous owner. I'm
looking for a replacement knob. Does anyone have a source or parts
unit I could buy a knob from ?

Thanks,

Mike Melland, W9WIS
Wisconsin, USA
| 2|2|2001-05-06 23:09:31|patricio@iname.com|Atlas 210x Page|
Hi everyone in the list , here i´ve discovered this page about 210x
it has some information including schematics.
http://www.qsl.net/on6ab/
73´s
LU5AKF
Patricio
| 3|3|2001-05-13 01:54:23|maxrotax@yahoo.com|new member|
Hi everyone,just got a 210x with console.
was dead on arrival,but after replacing a capacitor does now work,but
needs more work.

Found the group from the on6 webpage and reported fortwith.

Name is harry and qth is new zealand.

Problems:
no agc on receive(ca 3086?)
low outputlevel (20 watts)
Not so sensitive on receive.
no s-meter indication,but works on tx current(agc circuit)

good to see a group going on this wonderful primitive
transceiver,that seems increadibly durable.

let me know what your experiences are, the specs look better than
what i would think it could do,but i have not seen or heard one in
good health(or otherwise)

look forward to a lot of interesting repairs........

73's zl1bk
| 4|4|2001-05-13 11:13:08|maxrotax@yahoo.com|update on d.o.a. 210x|
Since this morning the s meter is back in action,thanks to another
dead capacitor and made a contact with it on 80 mtrs.
modulation sounds ok according to the other station,which was a bit
surprising.

i.f. ic mc1350 p looks a little suspect,do these go "soft" after time?

still looking for more sensitivity (receiver suspiciuosly quiet)

At least the lights work...........

zl1bk
| 5|5|2001-05-16 16:11:26|Peter Dalton|New member.|
Hello to all on the group.

I purchased an Atlas 210x a month or two ago and then went looking for
Atlas information on the net. All I can say is that there seens to be
very little information about (I didn't even find any info regarding
mods to these radios on any of the ham radio mod sites I looked at), I
remember that in their day these little radios were reasonably popular
and there must have been a body of knowledge about them at one time,
seems a pity if that information has been lost.

My 210x is working but with a number of problems. RX sensitivy is down,
worst on 20m. AGC locks-up from time to time, momentary reduction of the
RF gain fixes this. The NB introduces severe intermod from time to time.
So lots of fun ahead getting this one up to scratch.

On the positive side, my VFO seems rock stable.

I haven't yet checked the TX PA and driver, ie; haven't yet powered-up
the hi-current 12v line, but noted that the radio does produce a signal
from the pre-driver when keyed and modulated.

A question for the group: I have a photocopy of the "Installation and
Operation" manual, was there a seperate "Service" manual for these
(210x/215x) radios ??

I realy like the design of these radios, bare bones and reasonably high
performance and look forward to getting this one back up to scratch.

Thanks to Pat for the Egroup and Bruno for the 210x/215x site.

Best regards,

Peter VK1XP
| 6|5|2001-05-16 18:14:01|Patricio Alvarez|Re: New member.|
Hi Peter! Thanks for the message ,there is a page where you can find some
information perhaps http://www.qsl.net/on6ab/(here you have a copy of
service manual) another member of this group have the experience of
repairing 210x, talking about mods there is particulary one that is
mentioned in service manual that talks about choosing low or high part of
the 10m band and its said that is a easy mod but i haven´t found how to make
it, if someone in the list knows how, please tell me!.Fortunately mi rig is
working ok so if you want any help I´m QRV.
73´s from Argentina
LU5AKF
Patricio


| 7|7|2001-05-16 21:33:23|Patricio Alvarez|¿How to?--->210x may be easily owner adjusted to cover any 1000 kH|
 THE MAUNUAL SAYS:
----------------------------
 
GENERAL SPECIFICATIONS

BAND COVERAGE:

ATLAS 21 Ox: Covers 80, 40, 20, 15, and 10 meter bands, with internal VFO ranges as follows:

3500- 4000kHz                7000- 7500kHz             14000-14500 kHz            21000-21500 kHz           28400 - 29400 kHz

NOTE: The 10 meter band on the 210x may be easily owner adjusted to cover any 1000 kHz portion of the band.

......................

DO ANYBODY KNOWS HOW TO DO THAT MOD??????

Thanks!

Patricio

LU5AKF

| 8|7|2001-05-17 07:13:25|maxrotax@yahoo.com|Re: ¿How to?--->210x may be easily owner adjusted to cover any 100|
--- In atlas210x-215x@y..., "Patricio Alvarez" kHz 21000-21500 kHz 28400 - 29400 kHz
cover any 1000 kHz portion of the band.
Hi,Patricio,i guess they refer to the calibration capacitors which
are the unusually looking holes with the frequencybands printed
beside them on top of the vfo.
I think there is enough capacity in them to shift 500 khz across
either way to accomodate working a different segment of the 10 m.

If you are really adventurous you could make a switch wich would add
an exact(adjustable trimmer capacitor)amount of pf to shift a preset
amount of khz (700 khz would cover the entire band)so you could cover
the whole band with the flick of a switch.
One thing to look out for is the temperaturecoefficient of the
cap's,so that you dont create a drifting vfo that way.

Since the scale is only a black piece o plastic you could scan it and
turn out a scale of you own on your printer and decide what it should
look like.
Personally i would not go through this hassle,but you may have a good
reason for shifting the frequency.........I don't know.

Harry zl1bk.

| 9|9|2001-05-18 19:45:27|Patricio Alvarez|RE: [atlas210x-215x] Re: ¿How to?--->210x may be easily owner adju|
Thanks for your help Harry! , The mod it is not easy as the manual said,
but is a nice tip to whom needs the other part of the 10m band.
Thanks again Harry for your message!
Patricio
| 10|10|2001-05-19 00:11:35|atlas210x-215x@yahoogroups.com|New file uploaded to atlas210x-215x |
Hello,

This email message is a notification to let you know that
a file has been uploaded to the Files area of the atlas210x-215x
group.

File : /atlas_210x.pdf
Uploaded by : w3vet@...
Description : Atlas 210X/215X manual complete 3.2M

You can access this file at the URL

http://groups.yahoo.com/group/atlas210x-215x/files/atlas_210x.pdf

To learn more about file sharing for your group, please visit

http://help.yahoo.com/help/us/groups/files

Regards,

w3vet@...
| 11|11|2001-05-21 00:23:03|Dave deSouza|Newly Joined|
Hi guys.

Thanks to Peter VK1XP I found the group :-). Peter kindly replied to my
request on the newsgroups for circuit/data on the Atlas 210x.

I have had an Atlas 180, and then a 210X. I sold them both a long time ago,
but always hankered after them :-). I thought the design was excellent, and
the only downfall I thought was the vfo. Mine had problems with mechanical
FM when using it mobile :-(. Not too surprising I guess.

In any event I picked up a ravaged Atlas 210x from a junk sale. Someone had
removed it's PA and had a play :-(. However I did get it running, and the rx
works fb. The tx side of course only radiates low level fom the pre amp.
Well, I intend to re furbish it by removing the existing vfo and fitting a
PIC pll synthesized vfo instead. I will also add a blanker as it does not
have one fitted.

It looks like someone has been modifying the AGC system, but until I check
out the circuits from ON6AB's fantastic site I can't be sure.

ON6AB must be congratulated for a superb site. It must have taken a great
deal of time and trouble to accumulate all the infos. No doubt about it you
do not see that many good sites, but this must rank highly.

Thanks for letting me ramble :-). I look forward to participating in the
group.

Best Regards,

Dave G3VFP

http://www.btinternet.com/~g3vfp
| 12|12|2001-05-21 17:59:14|Sharyl - W3VET|Another Atlas Group|
To the atlas -Radio Group about the Atlas210x-215x group.
[copy to the Atlas210x-215x group]

There is another Atlas Group.
The group is at:
http://groups.yahoo.com/group/atlas210x-215x

I joined it and got this website from a posting by a group member.
http://www.qsl.net/on6ab/ VISIT THIS SITE.

This is the best atlas site I've seen bar none, with great info and a better
manual than the one I scanned in. Plus there are close up photos.

New people are finding our group so I will keep it open.
Anyway I urge everyone to join the other group as they have been going at it
longer and already have a database.

I did a search for this group and before I started the Atlas-Radio Group and
couldn't find it.
I think it may be because I used the word Radio in the group name.

I know this is somewhat annoying but if we do not post here it won't matter.

Since new people are finding us, I'll keep this group open as a conduit for
the other one.

73 DE Sharyl W3VET
http://radio.ajranch.com
| 13|13|2001-05-23 08:41:13|maxrotax@yahoo.com|Tinkering...........|
Hi,gave good to know there is someone out there that's restoring one
as well.

Got mine a short while ago and it was a bit sad.

It's sitting on my bench in front of me and is the type without the
blanker,its complete,but needs some work since most of 20 m. and up
is low output and unsensitive,although it all functions.

Vfo is workable and no worse than my ts 520 in the drift department.
however the output is down on the higher bands and i traced that
back to the actual 1 st vfo transistor,which output "leaks" on high
bands,i don't know why yet,and its a bit of a trick to get to it
where it is.......

Two things i can think off,one is bad c's in the osc. and the other
that it may need some form of choke to stop the rf from leaking into
the power supply,what else can it be?

i've asked around and some helpful hams have given me some help
already(thanks sharyl and michael)

Something i would like to know is: what is the outputlevel of the vfo
on the different bands,so i know what to look for.

I've found my way around to the different coils to adjust them for
best performance.
A difficult one was the input filters(The three double coils behind
the cristal filter)and they need a special trimmer wand with a hex
tip on a stalk so you can adjust the lower slugs on 20-15-10
respectively.

Look forward to some tinkering discussions! max zl1bk
| 14|13|2001-05-23 17:25:56|Peter VK1XP|Re: Tinkering...........|
Hello again to all,

I too have been tinkering with my 210x.

Mine is in surprisingly good condition and seems to produce a good clean
output on TX, according to a fellow I spoke to briefly on 20m the other
night.

However, it does have a few problems on the RX side.

The first RF amplifier 2N3866 is only conditionally stable, advancing
the RF gain control causes the stage to break into occilation. It is
noticable as a pop on the audio as the RF gain control is advanced from
it's minimum setting. If you "tune" the RF gain control to the point
where the pop is generated the oscillation is clearly audible as a loud
raspy note in the RX passband. I am not sure whether the oscillation
stops as the control is further advanced or the frequency of oscillation
moves up and out of the RX passband.

I started by looking at the circuit diagram for my RF board, a PC 120,
and making a few DC measurements around the first RF stage.

I found: a 10 ohm emitter resistor (R138) had gone short circuit and
also

found that the lower resistor in the bias voltage divider (R133), ie;
from the base to ground, which is marked on my circuit diagram as 10k is
in fact a 4k7 on my circuit board. I have three circuit diagrams for
different versions of the RF board, PC-100, PC-120, and PC-120B. On all
versions this bias resistor is marked as 10k.

I'll change the resistors and let you know how it goes.

I noted that RF Parts in the US list the Atlas 210x "Service Manual" as
available for US$15 on their web site. I would realy like to see the
service manual before I attempt to align the various filters on this
radio.

Harry (ZL1BK), if your Atlas is a goer perhaps we could meet on 40m some
time. My RX is still a bit down on sensitivity but probably OK for a 40m
QSO.

Best regards,

Peter
VK1XP


maxrotax@... wrote:
CUT ........................................
| 15|15|2001-05-24 07:40:00|maxrotax@yahoo.com|Resistors|
Peter,yes,that sounds fine ,a qso on 40,ok!

Just had a look and measured the two resistors;
The 10 k bias is 10 k and measured as well.
The emitter r is 330 ohms in mine!

My pc 100 b seems ok and stable on the rf gain.
They added a 15 pf cap opposite of the double balanced mixer with the
trimmer(says 22 pf in the diagram),and i'm not sure if this value is
ok,my trimmer is on max cap.
and i'll probably change for a smaller value and see if that gets the
trimmer within range.
I can get the balance ok but like it better if i can tune through the
range and find a real dip,rather than on the edge.

My sens is a little low on 40 too,but ok for most stations.

I probably need a good working rf probe to check levels rather than
rely on my scope,which is ok to 15 mhz.
found quite a few dud caps in mine,especially those white
electrolithics with 25 uf and up,just be wary of those...

if you would like a few scans of how my boards look let me know.

Good to hear from you harry(max) zl1bk
| 16|16|2001-06-23 06:33:55|Julia Minsel|Need help troubleshooting|
I have manual but it is missing wiring diagram.  Not successful yet to getting a useful wiring diagram from ON6AB site
believe my problem do not have correct program. 
 
Purchased Atlas 210x and it receives ok.
When purchased seller showed me transmit power with CW mode.
 
I then proceeded to hook up mic and when keyed ptt and switched function to transmit and cw caused problem.
Suspect power supply that came with it and substituted known ok supply for now.
Could see r 517  10 ohm 2 watt and r513 180 ohm 1/4 did not look healthy in power amplifier but checked ok
with ohmmeter when clipped one side and measured.
 
Also meter on Atlas 210X got current of with no key or mic inserted of .8
Running dummy load wattmeter tuner mfj combination showed about 5 watts output power into dummy load.
It should have shown nothing.
 
I got this when hooking up microphone and speaking into it and turning function switch to transmit and cw
( hindsight that was not to good of a move ) 
 
Any troubleshooting ideas will be appreciated.
 
Signed
Terry Minsel
WB8YRS
| 17|16|2001-06-23 08:01:48|Michael Oswald|Re: Need help troubleshooting|
Re: [atlas210x-215x] Need help troubleshooting on 6/22/01 9:32 PM, Julia Minsel at JMINSEL@... wrote:

| 18|16|2001-06-26 04:29:50|Julia Minsel|Re: Need help troubleshooting|
Re: [atlas210x-215x] Need help troubleshooting
Mike,
fax my attention
419-861-0603
Thanks
WB8YRS
Terry
| 19|16|2001-06-26 05:05:21|Michael Oswald|Re: Need help troubleshooting|
Re: [atlas210x-215x] Need help troubleshooting on 6/25/01 7:28 PM, Julia Minsel at JMINSEL@... wrote:

| 20|16|2001-06-26 05:09:15|Michael Oswald|Re: Need help troubleshooting|
Re: [atlas210x-215x] Need help troubleshooting on 6/25/01 7:28 PM, Julia Minsel at JMINSEL@... wrote:

| 21|16|2001-06-28 08:14:31|Michael Oswald|Re: Need help troubleshooting|
Re: [atlas210x-215x] Need help troubleshooting on 6/25/01 7:28 PM, Julia Minsel at JMINSEL@... wrote:

| 22|22|2001-08-09 21:19:49|Jim Glover|Problems with my 210x and console PS|
Hi, everyone!

Not too long ago, I had the good fortune to acquire a 210x. It
works, but has some problems, too. I thought I'd ask and see if
anyone recognizes the symptoms I'm having as common failure modes
for the 210x and its console power supply, or if anyone has any
suggestions.

The first problem I noticed is that the PS voltage goes too high
once in a while. At first, this was only a problem when I first
turned it on. The voltage would go high and stay that way for
maybe 15 or 20 seconds, several times in the first minute or two
it was on, then stay stable after that. The voltage goes up to
about 16.9 volts for the high-current side of the supply, and
about 15.9 volts for the regulated side. Lately, it's started
doing this more often, and for longer periods. Since the manual
says that you shouldn't use more than 15.5 volts, I've stopped
using the console PS until I can repair it.

Any ideas what might be causing the voltage to go high like that?

The other problem is that the rig won't work in SSB mode. It
does seem to "sort of" work, putting out what appears to be a
signal of a few hundred milliwatts. I've tried a different
microphone with the same results, so I don't think it's that.

Any ideas what might be causing the almost non-existently low
output on SSB?

(In future posts, I'll gush at length about what a joy the 210x
is to operate.)

73,
Jim WB5UDE
| 23|23|2001-08-20 11:51:31|Tilman D. Thulesius|ATLAS 210 mods.|
Hi there

Are you having any mods for the ATLAS 210 front reciever front end.
I´m thinking of swapping the DBM for a SRA1 or MD108. Also I would
like to stick the ladderfilter straight after the DBM. The IF-strip
schould be done with dual gate transistors.

Quite a heavy change.....

What do you think ??

/ Tilman SM0JZT
| 24|4|2001-08-21 08:45:59|tilman@algonet.se|Re: update on d.o.a. 210x|
Hi there

Have you tried to swap the MC1350 for a new one ?

How about swapping the 1N4148 fro HP Hot carrier scotty diodes ?
That schould improve the mixer a lot and even increase sensitivity.

/ Tilman SM0JZT
time?
| 25|5|2001-08-21 08:50:21|tilman@algonet.se|Re: New member.|
Peter

Guess your have by now found the http://www.qsl.net/on6ab/ page.

Fine dokument on manual with pics of the rig.

I don have one myself but am about to pick up a couple in
a couple of weeks time.

/ Tilman SM0JZT

for
be
at), I
popular
down,
of the
time.
up
signal
and
high
| 26|26|2001-09-14 16:18:42|Tilman D. Thulesius|test|| 27|27|2001-10-01 22:42:47|Gerhard.F.Wagner@t-online.de|Who knows more about this 210x limited edition?|
Attachments :
See enclosed Photo. This rig seems to be different from my 210X. Anybody
with Info on this RIG?
Regards, Gerhard Wagner DF1DA
| 28|27|2001-10-02 05:02:58|Erik Westgard|Re: Who knows more about this 210x limited edition?|
I saw an ad in an old 73 or QST. Maybe more power? 200W?

Erik, NY9D


-----Original Message-----
From: Gerhard.F.Wagner@... [mailto:Gerhard.F.Wagner@...]
Sent: Monday, October 01, 2001 3:42 PM
To: atlas210x-215x@yahoogroups.com
Subject: [atlas210x-215x] Who knows more about this 210x limited
edition?


See enclosed Photo. This rig seems to be different from my 210X. Anybody
with Info on this RIG?
Regards, Gerhard Wagner DF1DA


To unsubscribe from this group, send an email to:
atlas210x-215x-unsubscribe@egroups.com



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| 29|27|2001-10-02 05:03:01|Erik Westgard|Need Final Amp Board or Parts Rig|
I picked up an otherwise working 210x at a recent hamfest missing the final
amp board. Does anybody have a board deal or alive, or a parts rig with at
least that board still attached? I can spare $100 or so for it.

I kept seeing reports in old QST's about RF parts in CA being the last known
service depot?

Erik, NY9D
| 30|30|2001-10-08 00:27:31|Rick McKee|Power control mod ?|
Anyone have a mod for controlling output power via an external control
other than the mic gain control when using SSB ?

Thanks in advance,
73.....Rick, KC8AON
kc8aon@...

________________________________________________________________
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| 31|31|2001-10-12 00:20:12|Rick McKee|Group question ?|
Is there anyone on this list ?

Just wondering !
Haven't received anything since I joined !

73, KC8AON

________________________________________________________________
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| 32|31|2001-10-12 00:36:06|charles_mackinnon@3com.com|Re: Group question ?|
Lots of people but only periodic questions and spurts of activity on issues. 73

Charlie (K9MAC)




Rick McKee <kc8aon@...
Please respond to atlas210x-215x@yahoogroups.com

Sent by: Rick McKee <kc8aon@...

To: atlas210x-215x@yahoogroups.com
cc: (Charles MacKinnon/MW/US/3Com)
Subject: [atlas210x-215x] Group question ?



Is there anyone on this list ?

Just wondering !
Haven't received anything since I joined !

73, KC8AON

________________________________________________________________
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Join Juno today! For your FREE software, visit:
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| 33|31|2001-10-12 00:39:39|Stuart Liss|Re: Group question ?|
Yes, but there's only activity when someone has a question or a problem
with their atlas.

Since there's been no activity and I've been wondering how to fix a
problem, I'll ask a question.

I have a 210x and the frequency drifts. How easy is it to fix it? I
found someone on the web who used to work at Atlas and refurbishes
them. Perhaps I could ask him to fix it.

73s,

Stuart Liss, WA2PQE
liss@...

--- Rick McKee <kc8aon@... __________________________________________________
Do You Yahoo!?
Make a great connection at Yahoo! Personals.
http://personals.yahoo.com
| 34|31|2001-10-12 00:53:16|Dave|Re: Group question ?|
Yep! Chas is right :-). We are here and around, but of course it is true of
all "specialist" groups we are quiet for the most part, until something pops
up where we may be able to help out directly. I have had quite a few mails
from guys in the group, and always been grateful for their thoughts, and
time in helping out.

Don't worry about the apparent silences in between times :-)

Best Regards,

Dave G3VFP

www.g3vfp.com

| 35|30|2001-10-12 01:50:30|Rick McKee|Power control mod ?|
Well, certainly glad that there are folks around on the list ! The
silence was really making me wonder. But anyway, I have an Atlas 210X
that I plan on using both in the field and mobile and would like to be
able to control the output power via an external control other than the
mike gain control when using SSB. The reason I would like to do this is
mainly to conserve battery power when at the cabin which only has deep
cycle batteries and a small solar panel as a power source.
As for the guy with the drift problem, you might try looking at the
voltage regulation in the VFO. My 210X seems to be rock steady, but I
have a Swan 100MX with the same problem if anyone happens to have any
suggestions for it !

73........KC8AON

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| 36|36|2001-10-14 19:48:24|usievers@gmx.net|New to this group|
Hello to all members... my name is Uwe my call is DJ9XG i,m a ham
since 1964 and I own since several weeks an Atlas 210X.
This Atlas had been modified by the preowner but not documented...
the major changes are a new PC100 board with a complete new frontend..
SRA-3H Mixer... switchable premaplifier with a P8000 Fet... a 2 stage
50 Ohm Impedance broadband IF amplifier also with P8000 Fets just
behind the mixer and to get the high oscillatorlevel for the mixer is
an amplifier for the vfo installed, too... all of these stages are on
a new board.. the Originator of this board and all the mods is DL7IY
Detlef from Berlin.
The whole mods had been published in the German Ham Radio Magazine
CQ-DL 2/1980.
In addition a dynamic compressor board had been installed to have a
constant level in ssb mode... I have no details up to now, but I will
try to make reverse engeneering of this board.
Other changes are small pots on the low pass filter board (PC900)
which are not documented, but as I tried it... you can make some
adjustment to equalize the drive power to the final amp...
The next steps will be to use the ALC Pot on the front panel to
make it possible to change the power output continously from zero to
max output... to do this I will use the SWR circuit and put a voltage
from 0 to about 6volt onto this circuit. the ALC then can be
regulated via a small pot inside the transceiver....
other steps will be PSK31 connection to the backside socket and an
vox for this mode... I keep the group informed.
Sorry for this long post.
Uwe
| 37|36|2001-10-14 20:01:45|Dave|Re: New to this group|
Hi Uwe.

Please do not apologise for the long post. Well I found it very interesting,
and it shows just what guys can do to change equipments to suit their needs.
All interesting stuff Uwe :-).

Regards,

Dave G3VFP.

| 38|36|2001-10-14 20:21:31|Tilman D. Thulesius|Re: New to this group|
Uwe

Very interesting with the front end.

Do you have access to the article from CQDL ?
Would be very interesting if you could scan that and put that
on the net for us.

I can read german 100% so Iám fine with that.

/ Tilman SM0JZT

usievers@... wrote:

| 39|36|2001-10-14 20:29:20|Uwe Sievers|Re: New to this group|
Tiiman,
I will put it into the group... but I need some days to scan it... mainly the
circuit diagram and the pbc layout... in the text is an Noise blanker unit
too...
73 Uwe
| 40|36|2001-10-14 20:55:41|Tilman D. Thulesius|Re: New to this group|
Uwe

Gee - that sound very interesting. If possible it woudl be great to be able to
have
the text also. But I can understand if that could be hard to scan.

Thank you for your great input to the group / Tilman

Uwe Sievers wrote:

| 41|41|2001-10-14 21:24:58|vu3snm@yahoo.com|Newbie|
Hi all,

Just hunted down a 210X from a vintage radio shop in Texas. I should
be getting it in a months time! I fell in love with this is a radio,
like my 706 MKII, at the very first sight. Thanks Uwe for pointing me
to this site.

Looks like there are some good'ol friends like Dave on this list!;-)

Hope to post more in the near future!

Have a great sunday ...of whatever is left. We are already into
monday (3.30 AM) and I am still at work! See ya all

73's
Sasi
9V1SM / VU3SNM

*******************
Mr.Sasi Nayar
Reef Ecology Laboratory
Department of Biological Sciences
National University of Singapore
10 Kent Ridge Crescent
SINGAPORE 119 260
Tel : (+65) 778 7112
URL : http://www.dbs.nus.edu.sg/lab/reef/SasiNayar.htm

--------------------
Research Scholar
Tropical Marine Science Institute
14 Kent Ridge Road
National University of Singapore
SINGAPORE 119 223

Tel : (+65) 774 9881 / 7749658
Fax : (+65) 774 9654
--------------------------------------------
Join PLANKTONNET : An internet discussion forum for plankton
researchers
To join visit, http://groups.yahoo.com/group/planktonnet
--------------------------------------------
| 42|42|2001-10-16 22:01:19|usievers@gmx.net|RF- Voltages from VFO and Total Current RX7TX|
Hello,
today I made some measurements on my Atlas 210X. I know that the
results are interesting to many owners.
1. VFO output with an Tektronics Oscilloscope Type 454A on Pin 4
of PC 100 Board:
80m 2,6V pp
40m 3,2V pp
20m 2,8V pp
15m 2,8V pp
10m 3,0V pp

2. TX IF output on Pin 13 of PC 100 Board
on all Bands (of course it,s the IF signal for the TX Mixer 2V pp

3. Current under different settings on all Bands

RX current on all Bands AF Pot on 9 o,clock position 160 mA
12 o,clock 320 mA
The 9 o,clock postion is normal loudness so very low current

TX current: 5 Watt output into Dummyload 3,6A
10 Watt 4,0A
20 Watt 5,5A
50 Watt 9,0A

Full output on 80 is 90 Watts with 14 A
10 is 60 Watts 10 A

These were interesting results for me too. The Atlas is a very power
efficient. So if you want to use it "portable" and qrp-like it would
be very nice.
My unit has an new designed PC 100 Board installed with high current
Fets around the Mixer.
I keep the group informed about other findings and would appreciate
to get from other members their findings and results.
Uwe DJ9XG
| 43|43|2001-10-17 20:41:36|Peter Dalton|Hello Uwe and welcome.|
Uwe,

Thank you for the RF measurements of the VFO output and IF level.

I have a 210X with a PC-100C front end board. I have two copies of the
Installation, Operation and Maintenance Manual however these cover
earlier versions of the radio and do not cover the PC-100C ver. board.

I enjoy the reverse engineering process and from my observations of the
various ccts. and the actual radio it seems that Mr. Atlas was playing
with the design a bit over the life span of this radio. My 100C board
has two 2N3866 RF transistors between the mixer and the filter, it seems
that these were only conditionally stable and to calm things down a bit
after the boards were produced the cct was modified (tracks were cut)
with some extra unbypassed resistance added in the emitter circuits of
each transistor on the underside of the board. My board also has a Noise
Blanker, although this seems ineffective at the moment.

I am looking for a copy of the Service Manual to aid tune up of the
radio. My radio may not have been used on the ham bands, it came with
the optional 10XB xtal oscillator box and the xtals in the box are
marked with frequencies that were common here in Australia for the
outpost/outback radio service, so the radio may have been tuned for that
service as the RF output and RX sensitivity varies considerably from one
ham band to the next but is generally well down on expected performance.

I was interested in your comments on the pots used for equalization of
RF output (not mentioned in the Manual) and the better re-designed front
end board.

I look forward to hearing more on your efforts at reverse engineering.

Regards from,

Peter VK1XP
| 44|43|2001-10-17 21:31:18|Uwe Sievers|Service Manual|
Is someone in this group who has a service manual for the Atlas 210X?
It would be very helpful to scan it and make it available to the members.
Peter is also looking for it.
My unit has the serial number 112 95 (it,s an label, sticked onto the cover
of the VFO plate on the bottom). In my version is a complete different PC900
board installed. It has 4 small trim-pots for the output level and also 6 trim-
capacitors... most of the coils are toroids.. 2 coils are slug-tuned... and there
are more holes on the board to install additional parts.... there is very little
similarity to the circuit diagram in the manual.... but I think this PC 900
looks original by Atlas.
Another point I want to know which of the input filter coils belongs to which
band (for RX)? I have not disassembled the unit to find it out myself. I hope
this is shown in the service manual.
So if someone has it please let the group know it.
Uwe DJ9XG
| 45|43|2001-10-17 21:45:17|Sharyl - W3VET|Re: Service Manual|
Hi v,
Go here and get it
http://groups.yahoo.com/group/atlas210x-215x/files/
There is another one I uploaded to the other atlas group at
http://groups.yahoo.com/group/Atlas-Radio/files/

73 DE Sharyl W3VET
http://radio.ajranch.com

| 46|43|2001-10-17 22:18:50|Uwe Sievers|Re: Service Manual|
Hi Sharyl,
thank you for your very fast reply... the manual you,ve put in is the original
owner,s manual . I have this one here, too... what I,m looking for is a Service
Manual which describes more in detail the tuning procedures and the RF
voltages on the different boards... in the "regular" manual are very few infor-
mations only...
I dont,t know if such a manual is available... may be the only one is that we
have received together with the radio...
I,m still working on my radio and will share my findings with the group
members.
73 de Uwe DJ9XG
| 47|43|2001-10-18 05:05:23|sasi nayar|Re: Service Manual|
Very good idea Uwe to have them scanned and uploaded
to the file section (after notifying the moderator
ofcourse). It would be an added resource for the users
of 210X and 215X. BTW, it is being sold for US 22/- on
e-bay!
73's all
Sasi
9V1SM / VU3SNM



--- Uwe Sievers <usievers@... in this group who has a service manual
=====
Amateur Radio For Global Peace and Fraternity
----------------------------------------------
Sasi Nayar, 9V1SM / VU3SNM,
Reef Ecology Lab, Department of Biological Sciences
National University of Singapore,10 Kent Ridge Crescent
Singapore 110 260. Tel : (65) 778 7112; Fax : (65) 774 9654;
URL:http://www.dbs.nus.edu.sg/lab/reef/SasiNayar.htm

____________________________________________________________
Nokia Game is on again.
Go to http://uk.yahoo.com/nokiagame/ and join the new
all media adventure before November 3rd.
| 48|43|2001-10-18 05:09:12|sasi nayar|Re: Service Manual|
Just out of curiosity? Who are the moderators of the
two groups-this and the other one?
Thanks a million for the wonderful resource
Cheers and 73's
Sasi


--- Sharyl - W3VET <w3vet@... =====
Amateur Radio For Global Peace and Fraternity
----------------------------------------------
Sasi Nayar, 9V1SM / VU3SNM,
Reef Ecology Lab, Department of Biological Sciences
National University of Singapore,10 Kent Ridge Crescent
Singapore 110 260. Tel : (65) 778 7112; Fax : (65) 774 9654;
URL:http://www.dbs.nus.edu.sg/lab/reef/SasiNayar.htm

____________________________________________________________
Nokia Game is on again.
Go to http://uk.yahoo.com/nokiagame/ and join the new
all media adventure before November 3rd.
| 49|43|2001-10-18 09:56:26|Uwe Sievers|Re: Service Manual|
Attachments :
| 50|43|2001-10-18 17:01:53|Erik Westgard|Re: Service Manual|
I have a booklet called "Installation Operations and Maintenance" for the
210x/215x dated 1-77 that I bought on e-bay a while back. It is 52 pages,
and about 8x6 inches. It has a fold out chassis diagram showing
interconnects.

Is has schematics for one set of boards, but is missing the PC-120c board
(it has the PC-100c board). I agree with the earlier comments that they did
a number of updates to the hardware over time.

I have been looking for a parts radio, to get a 500D transmit board as my
210x was missing one, and finally got one. It was a 210 B model (?) which
is in perfect condition, but receives poorly (sounds clipped and
overloaded). It has an add-on pot and 10uf cap internally on a perf-board
that seems to be an extra RF attenuator.

The transmit board in the 210B is the PC-500-C, lacking the SWR protect
circuit. I was not sure if I could install the 500-C in my 210x that has a
good receiver if I left the SWR lead unconnected. My 500c board makes a
hissing sound from the larger of the RF transformers, and does not appear to
work.

RF Parts www.rfparts.com sells a "Service Manual" for the 210X, SMA-210X,
for $15.00. I was unable to find out if this is the same book I already
have, or a true "service manual." They have a $25.00 minimum order. They
were an Atlas service center, but have no more parts, other than items that
are "stock" like transistors.

One idea I had was to build a QRP outboard transmit board to take the place
of my missing 500D board.

Erik, NY9D



-----Original Message-----
From: sasi nayar [mailto:vu3snm@...]
Sent: Wednesday, October 17, 2001 10:05 PM
To: atlas210x-215x@yahoogroups.com
Subject: Re: [atlas210x-215x] Service Manual


Very good idea Uwe to have them scanned and uploaded
to the file section (after notifying the moderator
ofcourse). It would be an added resource for the users
of 210X and 215X. BTW, it is being sold for US 22/- on
e-bay!
73's all
Sasi
9V1SM / VU3SNM



--- Uwe Sievers <usievers@... in this group who has a service manual
=====
Amateur Radio For Global Peace and Fraternity
----------------------------------------------
Sasi Nayar, 9V1SM / VU3SNM,
Reef Ecology Lab, Department of Biological Sciences
National University of Singapore,10 Kent Ridge Crescent
Singapore 110 260. Tel : (65) 778 7112; Fax : (65) 774 9654;
URL:http://www.dbs.nus.edu.sg/lab/reef/SasiNayar.htm

____________________________________________________________
Nokia Game is on again.
Go to http://uk.yahoo.com/nokiagame/ and join the new
all media adventure before November 3rd.

To unsubscribe from this group, send an email to:
atlas210x-215x-unsubscribe@egroups.com



Your use of Yahoo! Groups is subject to http://docs.yahoo.com/info/terms/
| 51|43|2001-10-18 17:21:19|Uwe Sievers|Re: Service Manual|
Hi Erik,
I have the same manual as you... but in myone is the schematic of PC120
(NB-Board) page 48. I have the same info as you about rfparts.com... they
still offer
a "Service Manual" for $15 and an Installation Manual for $6.50 May be
some one of the group has found out the differences between the 2 manuals.
Meanwhile I found out how to adjust the input filters for receice..
looking from the top on the left half of the radio just behind the drum-scale
are 3 slug tunable coils (left of these are toroids) these 3 slug tuned coils
are the input coils for 20m, 15m, 10m (from left to right).
I tuned them with the calibrator on to maximum always in the center of each
band. 80 and 40 are not tunable.
| 52|43|2001-10-18 18:12:13|Erik Westgard|Re: Service Manual|
Hi:
I had no idea that was an accessory. I have it on P48 as well. Thanks! I
think there is hope for my bad receiver as I have all the diagrams now...
Erik

-----Original Message-----
From: Uwe Sievers [mailto:uwsievers@...]
Sent: Thursday, October 18, 2001 10:21 AM
To: atlas210x-215x@yahoogroups.com
Subject: RE: [atlas210x-215x] Service Manual


Hi Erik,
I have the same manual as you... but in myone is the schematic of PC120
(NB-Board) page 48. I have the same info as you about rfparts.com... they
still offer
a "Service Manual" for $15 and an Installation Manual for $6.50 May be
some one of the group has found out the differences between the 2 manuals.
Meanwhile I found out how to adjust the input filters for receice..
looking from the top on the left half of the radio just behind the
drum-scale
are 3 slug tunable coils (left of these are toroids) these 3 slug tuned
coils
are the input coils for 20m, 15m, 10m (from left to right).
I tuned them with the calibrator on to maximum always in the center of each
band. 80 and 40 are not tunable.



To unsubscribe from this group, send an email to:
atlas210x-215x-unsubscribe@egroups.com



Your use of Yahoo! Groups is subject to http://docs.yahoo.com/info/terms/
| 53|43|2001-10-18 20:57:26|Patricio Alvarez|Re: Service Manual|
Hi! my name is Patricio (patrick) LU5AKF from Buenos Aires, Argentina

W3VET is also able to modify the current settings

73 & Enjoy!

here are the settings for this group:

Posting
Posting Discussion is for=members
Moderation=Unmoderated
Attachments=Email attachments are permitted
Reply-to=Replies go to all members of the group
Subject tag=[atlas210x-215x]
Membership=Open membership

Features and Options

Messages=Members
Chat=Members
Files / Photos=Members------- Bookmarks Members
Database=Members
Polls=Members
Members=Members
Calendar=Members
Promote=Members


- - - - - - - - - -

_________________________________________________________
Do You Yahoo!?
Get your free @... address at http://mail.yahoo.com
| 54|43|2001-10-18 21:08:37|sasi nayar|Moderators|
Thanks Patricio for the info. I am glad I joined this
list...learning a lot! ;-)
Cheers, greetings and 73's from Singapore
9V1SM / VU3SNM


--- Patricio Alvarez <patricio@... my name is Patricio (patrick) LU5AKF from Buenos
=====
Amateur Radio For Global Peace and Fraternity
----------------------------------------------
Sasi Nayar, 9V1SM / VU3SNM,
Reef Ecology Lab, Department of Biological Sciences
National University of Singapore,10 Kent Ridge Crescent
Singapore 110 260. Tel : (65) 778 7112; Fax : (65) 774 9654;
URL:http://www.dbs.nus.edu.sg/lab/reef/SasiNayar.htm

____________________________________________________________
Nokia Game is on again.
Go to http://uk.yahoo.com/nokiagame/ and join the new
all media adventure before November 3rd.
| 55|10|2001-10-19 15:39:21|atlas210x-215x@yahoogroups.com|New file uploaded to atlas210x-215x |
Hello,

This email message is a notification to let you know that
a file has been uploaded to the Files area of the atlas210x-215x
group.

File : /AtlasNL.jpg
Uploaded by : kc8aon@...
Description : Atlas 210X Noise limiter mod

You can access this file at the URL

http://groups.yahoo.com/group/atlas210x-215x/files/AtlasNL.jpg

To learn more about file sharing for your group, please visit

http://help.yahoo.com/help/us/groups/files

Regards,

kc8aon@...
| 56|56|2001-10-19 15:41:37|kc8aon@yahoo.com|Atlas 210X noise limiter mod|
Gang,

I have uploaded a schematic for a simple noise limiter mod for the
210x rigs for those that dont have the factory optional noise blanker
installed. Can be used "with" the factory noise blanker too! A
friend has a 210X without the factory option and installed this in
his 210x with great results.

73........KC8AON
Rick, Willow Wood,Ohio
| 57|57|2001-10-26 22:15:59|michael.richter@team.telstra.com|Atlas 350 FS in Australia|
I noticed an ad in November Radiomag for an Atlas 350 for $Aus500 -
let me know if you want the details.

Mike VK2BMM m.richter(at)bigfoot.com
| 58|58|2001-11-04 15:43:18|Rick McKee|210X Low ouput on 80M|
Gang,

I have an Atlas 210X with low output 0n 80 meters (about 25 watts).
Anyone have any suggestions on where to start looking ? All other bands
seem to be fine, and on inspection I can't seem to see anything burnt or
otherwise obvious ailments.

Thanks & 73
Rick McKee, KC8AON
Willow Wood,Ohio

________________________________________________________________
GET INTERNET ACCESS FROM JUNO!
Juno offers FREE or PREMIUM Internet access for less!
Join Juno today! For your FREE software, visit:
http://dl.www.juno.com/get/web/.
| 59|58|2001-11-04 16:20:45|Uwe Sievers|Re: 210X Low ouput on 80M|
Hi Rick,
first step measure the SWR of your 80m antenna... if it,s high the protection
circuit of the Atlas will drastically reduce the power... 1:3 SWR = 20 watts
output... see also page 7 of the manual..
second step is to check the 80m Bandpassfilter on the right side of the radio
between the VFO-Box and the RF-Board PC100 (the most right one in in the
radio).
My guess is that you have a SWR-problem, because the other bands are ok..
all units are in use on all bands except the filters.
Godd luck
Uwe DJ9XG
| 60|58|2001-11-05 00:34:58|Rick McKee|Re: 210X Low ouput on 80M|
Hi Uwe,
Well, thanks for the info, but it does it even when connected to my 50
ohm dummy load that shows a 1:1 swr. My antenna is a 178 foot long
ladderline fed zepp and MFJ 3KW tuner that works 10 thru 160 meters, so
I'm always looking into a good match. That was the first thing I checked
! Thanks for the input....

73........Rick,KC8AON

On Sun, 4 Nov 2001 15:21:01 +0100 "Uwe Sievers" <uwsievers@... writes:
________________________________________________________________
GET INTERNET ACCESS FROM JUNO!
Juno offers FREE or PREMIUM Internet access for less!
Join Juno today! For your FREE software, visit:
http://dl.www.juno.com/get/web/.
| 61|61|2001-11-05 10:29:08|maxrotax@yahoo.com|low output on 80 m.....|
Hi, Rick, i have recently aquired some 210-x 215-x transceivers and
compared them with my older version 210-x.

The newer ones have adjustment pots on the input filter board ,one
for each band.
the input filterboard is located to the right and next to the vfo and
is the one that does not plug in a connetor.
These pots seem to adjust(limit)the output on each band and may be
what you are looking for.

Another thing that may be more difficult to do is checking the output
filters,located beneath the 100 khz cal.oscillator behind the shield.

it may have something wrong in the 80 m section.

BEFORE YOU ATTEMPT TO DO THIS,check the hf voltage levels between the
bands at the input of the rf amp board and see if the proper drive
levels are at least present there.
also check the final power amp current and compare with the output.

Let us know what the results are; max zl1bk
| 62|58|2001-11-05 10:43:16|Uwe Sievers|Re: 210X Low ouput on 80M|
Ok Rick,
no match problem then the only parts which are really for a specific band only
are the filter on the PC-900 board and the pc-1010 board.... there you have
either a broker toroid (due to mechanical or heat impact) ore a poor
connectionto these 2 filters... all other parts in the radio are common..
if you have some measurement tools (RF-Voltmeter or better a scope) try to
measure the input abd output rf from the pc-900 filter and compare it between
the bands.. my 210X has for 80-15m (not for 10m) small Trimm-Pots installed
(not shown in the circuit diagramm!)... with these pots I can regulate the
individual output of each filter.. so make a measurement there.. you have
access from the top of the open radio to the bandswitch (a little bid difficult
because of the space there)...

another measurement way is to measure the voltage on pin 18 of PC-Board
300 (this is the ALC-Input)... the voltage there should be the same on all
bands if the radio is connected to a 50ohm dummyload....
may be you should do this first with a standard voltmeter Atlas on transmit
with some carrier on CW....
if the voltage is the same on all bands your PA and the protection circuit
there works ok... if you have a higher voltage on 80 then on the other bands
take a look to the components of the low pass filter for 80m... may be a
toroid is broken or another component is defective (capacitor burned,
shortage)..
good luck
Uwe
| 63|63|2001-11-05 11:04:33|maxrotax@yahoo.com|more low power hints.|
Adding to the list,Rick i just remembered there is a trimmer inside
the transceiver body on the antenna relay board that influences power
output,i think its part of the foldback swr protection circuit and is
shown in fig.4-14.

another is the flat trimmer-capacitor on the hf amp pre-amplifier
board pc 520-a which is the doughterboard on the final amp board.
it somewhat tunes the driverstages and possibly may need adjusting.

Max
| 64|64|2001-11-07 09:54:18|maxrotax@yahoo.com|PHOTO'S !!|
Just thought i would put up some foto's in the photo section to cheer
things up a little and to explain things better we can now refer to
pic no.....

Aquestion to the members; in my 215-x is a flat package driver
transistor that replaces the round 40582 driver.

I think this is done in the factory since there are no tell
tale "spare"holes in the heat sink and no chance to damage the power
amp by accidentally shortening the driver.

The transistor is marked "d 886" which makes me think it is a 2sd886

however it looks (see picture)that this one is not the original!!
----------------------------------------------------------------------
Can someone in the audience tell me if and if not which is the
original type?????
----------------------------------------------------------------------
and thanks to Uwe for the vfo rf voltages.

I have measured mine and they are all in the ball park compared to
yours,but it is very importand info!

One of my 210's is behind a lot in vfo output especially in the
higher bands and it is nice to compare these values with yours.

The highest output level on mine is 100 watts on 80mtrs and all other
bands are behind to some degree i am now working to get the most out
of these transceivers so stay tuned for some more upgates....

Max zl1bk auckland new zealand
| 65|30|2001-11-07 10:31:05|maxrotax@yahoo.com|Re: Power control mod ?|
--- In atlas210x-215x@y..., Rick McKee be
the
this is
deep
the
but I
any
/.

Rick,you may want to consider modifying the alc pot (i never use mine)
to apply some voltage to the swr protect (on the final amp. board)
which clamps down the supply to the pre-driver transistor(q 501)
With any luck you may end up with a nice output control.
try this with an external pot first since i have not tried it but
think this may work nicely.

73's Max
| 66|64|2001-11-07 21:52:39|Dave|Re: PHOTO'S !!|
Hi Max.

Unfortunately the reflector like most others in yahoo have been set to
remove any inclusions to mails. This includes pictures of course, and is
intended to minimise the propagation of viruses....well of course there are
interpretations of that, but in any event the atlas site at Yahoo has a
"files" section, and all pictures, schematics etc could be uploaded there,
and viewed or downloaded by members as they wished.

This explains why your pictures never appeared Max :-).

Best Regards,

Dave G3VFP.

| 67|64|2001-11-08 22:14:22|maxrotax@yahoo.com|Re: PHOTO'S !!|
--- In atlas210x-215x@y..., "Dave" and is
there are
has a
there,
Dave,i can see the pictures just fine,clicking on"foto's" just below
the "files" area will bring up a folder"max zl1bk etc." and clicking
on that produces 11 photo-thumbnails,clicking on the thumbnail in
turn brings up the foto in half screen size.
Can you not do that?
its a new function(and a very functional one i.m.h.o.)of the yahoo
groups.
As you say its independant of the e-mail delivery and accessible on
the foto's section as "add foto" in the approprate folder.

Thanks for the comment; Max.
| 68|68|2001-11-08 22:26:16|maxrotax@yahoo.com|receiver sensitivity increased.|
After examining a funny litle box that was hanging out of my new 210 x
i found it was a pre-amplifier.
i have it now permanently installed in the rig and have identified it
as a upc 1688g wideband amplifier which is the predecessor of the
mmic-mar series of ic's.
This little surfacemount ic produces enough gain(15 db.)to bring the
10 m band and lower to life,connecting the antenna now produces 1 s
point of increase in noise on 10 m.
Of course it also works on the lower bands too and i have not found
any adverse effects like cross mod. or so,so i am looking at
incorporating something like it in the other sets as well.
At this time it seems a way to increase vfo levels in an easy way as
well and therefore increase sensitivity and output levels.
I haven't tried the vfo bit yet but plan to do so in the future.

Continuing with the improvements; Max.
| 69|69|2001-11-09 08:11:56|Tilman D. Thulesius|Re: PHOTO'S ??|
Where can i find the homepage where these photos are ??

/ Tilman

maxrotax@... wrote:

| 70|69|2001-11-09 18:33:44|Patricio Alvarez|Re: PHOTO'S ??|
Hi!
at this URL you can find the pictures:
http://photos.groups.yahoo.com/group/atlas210x-215x/lst

Spanish:
en esta dirección puede encontrar las fotos:
http://photos.groups.yahoo.com/group/atlas210x-215x/lst

73 & DX
Patricio LU5AKF
Buenos Aires
Argentina

PD: ¿Hay alguien más en el grupo que hable Español?


_________________________________________________________
Do You Yahoo!?
Get your free @... address at http://mail.yahoo.com
| 71|71|2001-11-14 06:22:01|maxrotax@yahoo.com|Pre-amplifier success.|
After mounting a pre-amplifier in the chassis of the 210-x i have now
buildt another one on the actual receiver board.

This one has a mmic mar-6 ic as its active part,its simplicity itself,
as you can see in the diagram.

However its a very tiny piece of gear and needs to be delicately
soldered into place.
Since values are not critical due to good engineering on behalf of
the mar-6 i have found some smc capacitors which allow for very
compact installation.

to feed the mar-6 you only need a 680 ohm resistor on the wiper of a
1k potmeter between 12 volts and ground which you can adjust for
required gain and will let you
adjust it for -20 db and +22db gain.

I found that this turns a somewhat reluctant receiver into one that
will please you even on the 10 m. band.
i haven't tested it on cross modulation extensively but found it
quite acceptable in most cases on all bands,again if the gain is too
much for you just adjust the potmeter untill you are satisfied in
your location.

Also i have replaced the four 1n1449 diodes in the first mixer with
hot carrier shottky ones(1n5711)but this did not improve or alter
anything to the set.

Made three more scans of the project and put them in a separate
folder in Max's pictures to stop confusion.

Nice results so far so i thought i would share this info with you all.

Happy hamming; Max zl1bk.
| 72|72|2001-11-15 05:02:40|uwsievers@web.de|Preamplifier from Max|
Fine Idea Max with the amplifier you,ve installed.. when I saw the
circuit diagram and your comments about gain -20db to +20db...
depending on the operation voltage of the mar-6... my idea is
use the rf-gain pot on the front panel for this.. so you can regulate
the rf-gain from attentuation to full amplification.... in my unit
I have already completly cut off the rf-gain from the 2N3866, because
the pot is changing the working specs of this 1st IF amplifier to an
wrong point and is the source for addtional IM3 problems ..so put
the 2N3866 to max gain and use the (now) free pot for the new
amplifier.
I will try this when I,m back at home.
Uwe DJ9XG
| 73|72|2001-11-15 08:14:33|maxrotax@yahoo.com|Re: Preamplifier from Max|
--- In atlas210x-215x@y..., uwsievers@w... wrote:
regulate
because
Uwe,that sounds like an interesting option,i hadn't thought of that.
i actually estimated the - 20 db at the time but after exploring the
effects it is more likely to be -60 or more,i can actualy cancel out
the beat-tone of a 10 db over nine signal to the point that you can't
hear it anymore.
This actually happens at +2,5 volts supply to the mar-6 measured at
the wiper of the pot that supplies the mar-6 through the 680 ohm
resistor.

there is a sharp dip at that point and lowering the supply voltage
even more results in the beat tone becoming audible again at a much
lower level,not what i would expect,but there you have it.

This is actually a very acceptable range of hf gain!

Tomorrow i will actually change the rf gain to do just what you have
suggested and report on the results as soon as i can.

also on the note to alter the hf power i thought it would be nice to
use the mic gain and replace the pot with a trimpot to make the mic
gain adjustable through it and use the mic gain pot to control the rf
output of the atlas,this must be a more useful tool than the mic gain
and has about the same effect.

After that i think i would concentrate on the power loss on the
higher bands and see if it is possible to restore some more output by
increasing the output-level of the vfo unit.
After that it should produce a very respectable transceiver,the
reception is improved a lot and is a pleasure to use instead of my
standard kenwood receiver that now sounds as if it receives all
stations at the same time,(hi).

Thanks for the idea,Uwe and i am very interested to hear the results.

Max
| 74|74|2001-11-16 00:17:39|uwsievers@web.de|Ideas for Atlas 210x Enhancements more bands (WARC)|
Idea is to put in parallel to the Freq. Adj. Trimmer other
capacitors via small DIP relays... these relays can be put
to a voltage which is switched via the band switch and will be
activated by the NB-Switch (NB = New Bands... before it was the
Noise Blanker).. with the actual Bandpassfilters installed in the
Atlas it should be no problem to use 30m, 17m and 12m too...
I know my description is may be a little confusing.. sorry for it
but I have no software here available to make a circuit diagram
and put it here into the File area.I,m on vaction but after returning
I will put it here to the side....
the signal flow would be
plus 12 V from band switch (Band dependant)... Relay coil one side
other side to NB switch other contact of NB switch to ground..
the relay-contact will switch a variable capacitor parallel to the
front operated calibrator capacitor. So if you change the band
always a different relay will be activated if the NB switch is On..
so 20m plus NB-On will give you 30m
15m 17m
10m 12m
Any ideas welcome Uwe DJ9XG
| 75|75|2001-11-16 02:50:33|maxrotax@yahoo.com|rf gain controls pre-amplifier etc.|
Uwe,today i put your idea in place and it works fine.

As usual i have put more pictures in the photo's area to back up
my little modifications.
Look for rf gain mod folder in the pictures.

The first step was to permanently feed the 2n3866 and that was easily
done by de-soldering diode d-108 on the connector side and re-
soldering it to the point where r 108 and r 109 meet.
this produces abt 8 volts to d-108 as if the rf gain is fully open.

Secondly i used that pin(14) to feed some dc. to the 680 ohm resistor
that feeds the mar-6.
This is still done from the standard pot "rf gain" but i now feed it
with 12 volts from the battery(the red wires)
To obtain minimum rfgain at the lowest setting of the potmeter i
soldered a 10 k trimpot across the potmeter and adjusted it for
minimum gain in the lowest setting of the rf gain control.
Together with the resistor at the bottom of the rf gain pot this now
produces 2.5 volts in the min gain position to feed the 680 ohm
resistor for the mar-6.

You can hear a distinctive dip at the 2.5 volt point whilst adjusting
the trimpot.


SECOND MODIFICATION:

I altered the mic gain potmeter to be the hf output control!!

First i tried to apply dc to the swr protect line to reduce output.
this worked partially but had a sudden drop from 10 watts to zero in
an uncontrolled way.
Needless to say i was unhappy with this result and approached it
differently;
i used the mic gain potmeter to lower the bias to Q501 on the main
amp board.
By inserting an rf choke to the base of the transistor and de-
coupling the other side of the choke with a small c(0.1uf).
This produced a very nice control between zero and full output in the
transceiver spread over most of the scale of the mic gain control.
it differs from band to band to some degree but puts a very nice
adjustable ceiling on the amount of rf power delivered to the antenna.

Basically the potmeter is in parallel with the base resistor of Q501
and drags its dc level down according to the setting of the potmeter.
This works in a very controlled way.

It works similar to the mic gain but much more precise in the
limiting of the max output.

Of course the cw function still works the same exept for the fact
that now the hf output is reduced rather than the audio level.it
still sounds the same,though.

I guess the last mod. is for specialised use or qrp operation where
you would want to limit the output in a more precise way.

So far i am quite happy with the results.

Have a look at the scans and ask any questions;

MAX zl1bk
| 76|74|2001-11-16 03:34:16|maxrotax@yahoo.com|Re: Ideas for Atlas 210x Enhancements more bands (WARC)|
--- In atlas210x-215x@y..., uwsievers@w... wrote:
returning
Only part of bandswitch i can see which can do dc is inside the vfo
compartment,not easy to get to,However maybe you can use the
transmitter input filters switch if you put 0.1uf caps in series with
the hf path and chokes to pass the dc through to the relay's.


Just wondering how well the accuracy is on the scale after modifying
it for different bands,it seems nicely proportioned now for all of
them.

The receiver passbands are two tuned,coupled bandpass filters,i think
they may not allow for much adjustment.

Just a little sceptical at this time for this expansion
modification,but haven't given up on it yet.

MAX


| 77|74|2001-11-16 04:47:54|uwsievers@web.de|Re: Ideas for Atlas 210x Enhancements more bands (WARC)|
--- In atlas210x-215x@y..., maxrotax@y... wrote:
with
you are absolutely right.. there is no 12 V switchable from the
filter boards... I,ve just downloaded the manual from the on6 site...
so if no 12 V switchable available I have to reverse the signal flow
from the PC-900 board, it,s easy accessable, I will use the switched
ground through the filters, either input or output... for this I have
to put in each of the leads a rf-choke to isolate the rf from the
relays...
so the signal flow will be switchable ground from PC-900, relay coil,
other end to NB switch, other lug of switch to plus 12 Volt
On..
modifying
I don,t know it now but the new bands are only 100Khz wide so it
should fit in some way to the scale
think
ok that,s may be a little problem ..if yes I may have to had via
the same relay method additional capacitors parallel to the
existing filter in-and outputs.... that will give the whole thing
much more complexity. But may be someone will add only one band
so it should be not so difficult...

| 78|75|2001-11-16 05:13:50|uwsievers@web.de|Re: rf gain controls pre-amplifier etc.|
--- In atlas210x-215x@y..., maxrotax@y... wrote:
great work Max.. it,s an good approach for both mods
the rf-amplifier now available with a wide range from
attentuation to amplification and very easy to install

and also the Output Power Level adjustment from the front
panel... I think it would also work with the ALC Pot..
so you will still have the mike-gain available on the front panel
and will make a fix level to the ALC with an trim-pot installed
inside the box.

another thing I found on your photos are the circuit diagramms
with which tool to you create them?
and do you have also a photo from the PC-900 Board of the 210X?
It,s very helpful to see on your picture which parts are responsible
for which band... but your picture shows the 215 board...
so if you have for the 210 these pictures too may be from the other
filter boards as well, pleas put them onto this File.

Tomorrow I will receive another Atlas 210X but with several parts
missing (Power Amplifier, the PC-300 board, all covers, the scale and
some knobs) I bought this via ebay as a parts source... for me it
will be a good way to refurbish it and/or make more mods then with
my "good" one... I will install a digital display (draws only 20mA),
and a VFO stabilizer instead of the analog scale ... so I have enough
space... the missing PC-300 will be rebuild from available parts and
on top I will install on the same board a Vox (one CMOS chip only)..
I will use the Vox for PSK operation mainly... the new Power Amp will
produce about 25-30 watts with 2SC2078 (2 in the final stage , 1 for
the driver stage). I have already such an amp in use for another
homemade transceiver.. so I have to convert the dimensions to the
Atlas PA-box.. the low pass filter is in the unit so I do not have to
wind all the toroids....
You see I, have some time here to think about the wunderful Atlas
I,m currently in Florida for vacation.
Uwe
v
| 79|79|2001-11-17 02:18:56|maxrotax@yahoo.com|Full of good idea's........|
It's such fun bouncing idea's around with you,Uwe,i very much like
the idea of using the alc pot instead of the mic gain,will probably
change to that idea,makes a lot of sense.

As for the 210-215 filterboard,they use the same board but with one
vacant place which is either the 10 or 160m section.
will make another scan for you because it makes for a complete set
and that makes things clear for everyone.

The program i use for schetching is part of my flatbed scanner
program,but it is so basic that you could probably do the same thing
with ms. paint or so which is a standard in w 95 and up.
its quite basic(you can't even draw a circle)but the colours make up
for some of the difficiencies.

You are so right,having more than one atlas will let you do great
things in comparing and so on,as it turns out my first one was an
early model and has a few things basically wrong with it for example
the vfo has old style transistors in it and i will replace the whole
thing with either the new design or something much better.
You have me very intrigued with your plans about a new readout,that
should solve a couple of difficulties in using it around the bands.
i assume it is programmable and you can add or subtract the if
frequency and /or usb-lsb to give you true readout of the operating
frequency on the particular band you are using.

The other thing they have done in the early series is put in mrf 464
finals,and whilst they are bombproof they also have a lower hfe on 12
volt because it's a 28 v final with 15 db of gain at that
voltage,operating on 12 volt at least halves that gain factor and
makes it hard to get 100 watts out of it.
on the other hand 50 watts will do nicely and will provide for a very
long lifespan with just about any antenna,the mrf 464 is rated at 250
watts dissipation,10 amps Ic,28 v supply and 80 watts output each
according to the motorola manual,another set of finals is the mrf453,
175 watts dissipation,15 a Ic,12v supply and 60 watts output but with
13 db gain which gets you to 100 watts much easier.

one other thing i want to do is put some specifications and parts for
the different models in the database or so so that one can compare
different radio's and estimate what each should do if they are in
good order since there is quite a spread of spec's on the different
radio's at different manufacturing date's.
your vfo data is a good example of that kind of thing and if you have
just one atlas it gives you something to work towards.
i wish other members would do the same thing so we can develop a
better picture of actual statistics of the radio,which usually are a
little scetchy.
After working with it for some time now i get quite familiar with the
circuitry and plan to get the maximum performance out of it and
explain how to go about that in the process.
Also i would strive to leave the radio essentially intact and make
the "improvements"as inconspicuous as i can.
It would be great if we could do so as a team effort,i know that your
idea's helped a lot,thanks for the input,Uwe
MAX
| 80|80|2001-11-18 04:58:03|uwsievers@web.de|Very poor Atlas210x from an Ebay auction has arrives|
Yesterday I received an Atlas 210X, better the remainings of it.
I have bought in an Ebay auction. It was offered as an parts source
in poor condtition. In reallity it,s much much much poorer then it
was offered..... very few parts are usable... the unit looks like it
was direct taken out of a trash can and then offered via Ebay...
to give you an impression.... it was offered without PA-Unit, without
any cover even for the VFO, without PC-300 Board and some missing
knobs.... the unit having it here on the table is the same but much
more things are missing or not usable..
the relay on PC-100 Board, the CA.... Chip on the IF- Board, the whole
calibrator board.... rust on the mike-gain pot, corrosion on the
ssb-gen crystals and the filter, corrosion on all trim pots on the
boards... defective loudspeaker, bent chassis due to mechanical force
and so on.
I have written already an email to the guy who had sold me this
trash.. no answer up to now.. will wait and see... by the way before
starting to bid I had exchanged emails with the seller asking im
about the unit and his answer was.. it,s like on the photos ....
so be aware if you bid for parts sources on Ebay you may get such
things even this seller has an very positive record on Ebay.
Uwe
| 81|80|2001-11-18 05:14:08|kr0y@arrl.net|Re: VFO|
I've got an old Atlas 180 that I'm working with, trying to get into 'better'
condition. I know this email list is for 210/215 units, but I thought maybe
I could use some ideas from the 210/215 model to 'improve' upon this 180.
What I've got in mind may not even be possible.

What I've found with the 180 is that the VFO is pretty 'poor' in its design.
Specifically, capacitors in the VFO circuit are switched with the bandswitch
and the bandswitch contacts add enough capacitance, which varies as the
switch is moved, that the VFO shifts frequency if the bandswitch is 'rocked'
slightly.

I'd be interested in knowing how the VFO in the 210/215 is constructed. Is
it similar in design to the 180, or did they 'improve' upon this design? If
it is similar, what methods have been used to 'fix' this type of problem?
Finally, does anyone have any good photos of the inside of a 210/215 that
they could email to me, so that I can see the differences between the 180
and the 210/215? My email address is: kr0y@....

Or, would I be better of just 'dumping' this 180 and get a 210 or 215 to
'play with' instead? :-)

John Rayfield, Jr.
| 82|79|2001-11-18 05:21:16|uwsievers@web.de|Re: Full of good idea's........|
--- In atlas210x-215x@y..., maxrotax@y... wrote:
Thank you for this explanation.. my PC-900 has also the trim-pots
installed which allow you to equalize the driving level to the PA

example

see seperate Post of my "new received Atlas 210X!
whole
The digital display is an easy programmable couter which is sold as
an kit in Germany (www.funkamateur.de) for 89 Deutschmark (US$ 40)
I will use this kit because it,s cheap, has everything included and
will fit into the frontpanel... subtracting/adding of IF included
with this display the band enhancements will make no problems with the
(possible new)scale.

464
12
very
250
I have the mrf,s in my 210X and they produce indeed much less output
on 80m with 15V about 90 watts... with 12V it,s dropping down to 60
watts and less on the higher bands 50 watts is the maximum on 10m

I always try to use cheap CB-Final PA Transistors.... they are
designed for 27MHZ 12V... and they are cheap the wellknown 2SC1307
costs 1,60 DM (US$ 0,70) of course the maximum power you can achieve
with 2 of these in the final stage are about 30watts on 10m... but
for many purposes it,s well enough... I let you know the results

replacing the original PA with such a smaller one...


for
have
a
I would appreciate it very much that,s if other members of this group
would put their ideas and findings into this group,too.

My current Atlas has an outstanding receiver performance.. compared
with a bunch of other commercial radios like (FT-847, FT-7B, IC-706,
IC-735, Kenwood TS-515, Swan CX-700/SS-16B).
No one of these radios has a better reception on crowded bands as my
Atlas 210x... in Europe f.e. we a lot of IM3 Problems on 40m... not
the Atlas... even with very long antennas..


the
I will go the same way...
Uwe
| 83|80|2001-11-18 05:34:59|uwsievers@web.de|Re: VFO|
Hi John,
you should bookmark a very helpful internet site

www.qsl.net/on6ab/Index.html

on this site are copies for download of the complete 210X/215
manual, the chassis wiring, all PC-Boards and a lot of photos
from the 210X also with details from the most important boards.
The circuit of the 210X Vfo is more or less the same... switchable
coil and capacitors... look onto the circuit diagram of the 210X
anf compare it with yours from the 215X.

And you should stay in this group with your Atlas 180 as well


Regards Uwe DJ9XG
| 84|79|2001-11-18 06:03:14|Erik Westgard|Re: Full of good idea's........|
Nice writeup. I have a 210x missing the finals board, and a 210B that I
thought was a 210x that does not transmit properly. Has anyone heard of a
210B? I was thinking of making up a low power/QRP transmit board for my
210x...
Erik

-----Original Message-----
From: uwsievers@... [mailto:uwsievers@...]
Sent: Saturday, November 17, 2001 9:21 PM
To: atlas210x-215x@yahoogroups.com
Subject: [atlas210x-215x] Re: Full of good idea's........


| 85|80|2001-11-18 06:17:36|kr0y@arrl.net|Re: VFO|
Thanks for the information and the url.

Looking at the schematic of the 210/215, it looks like they didn't make too
many changes from the 180. The VFO schematic looks almost identical.

So, this brings up my original question again....My 180 has a VFO stability
problem when the bandswitch is 'rocked' a little bit. It appears that this
is due to varying capacitance through the bandswitch contacts. Is this a
common problem with these Atlas rigs, or do I just have a 'bad' one,
possibly a bandswitch that simply needs to be replaced?

Any thoughts or ideas?

John

-----Original Message-----
From: uwsievers@... [mailto:uwsievers@...]
Sent: Saturday, November 17, 2001 9:35 PM
To: atlas210x-215x@yahoogroups.com
Subject: [atlas210x-215x] Re: VFO


Hi John,
you should bookmark a very helpful internet site

www.qsl.net/on6ab/Index.html

on this site are copies for download of the complete 210X/215
manual, the chassis wiring, all PC-Boards and a lot of photos
from the 210X also with details from the most important boards.
The circuit of the 210X Vfo is more or less the same... switchable
coil and capacitors... look onto the circuit diagram of the 210X
anf compare it with yours from the 215X.

And you should stay in this group with your Atlas 180 as well


Regards Uwe DJ9XG
| 86|80|2001-11-18 07:53:37|Patricio Alvarez|Re: VFO|
Hi! if somebody finds another Atlas 210 related link , there is a bookmark
section in the list where you can leave the link and also the description of
the link.
Links sectionis reachable by clicking this:
http://groups.yahoo.com/group/atlas210x-215x/links

regards
Patricio LU5AKF
Buenos Aires Argentina


- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -

_________________________________________________________
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| 87|87|2001-11-18 08:04:18|atlas210x-215x@yahoogroups.com|New poll for atlas210x-215x |
Enter your vote today! A new poll has been created for the
atlas210x-215x group:

How many years have you owned your
Atlas?

o less than a Year
o 1-2 years
o 3-4 years
o 5-6 years
o 7 or more


To vote, please visit the following web page:

http://groups.yahoo.com/group/atlas210x-215x/polls

Note: Please do not reply to this message. Poll votes are
not collected via email. To vote, you must go to the Yahoo! Groups
web site listed above.

Thanks!
| 88|87|2001-11-18 08:09:27|atlas210x-215x@yahoogroups.com|New poll for atlas210x-215x |
Enter your vote today! A new poll has been created for the
atlas210x-215x group:

Give a general score for Atlas 210x, in
a
scale of 1 to 10

o 1
o 2
o 3
o 4
o 5
o 6
o 7
o 8
o 9
o 10


To vote, please visit the following web page:

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Note: Please do not reply to this message. Poll votes are
not collected via email. To vote, you must go to the Yahoo! Groups
web site listed above.

Thanks!
| 89|87|2001-11-18 08:12:16|atlas210x-215x@yahoogroups.com|New poll for atlas210x-215x |
Enter your vote today! A new poll has been created for the
atlas210x-215x group:

How did you get you Atlas 210x?

o I buy it in a hamfest
o I buy it in a store (second hand)
o I buy it in a store (new)
o It was a present


To vote, please visit the following web page:

http://groups.yahoo.com/group/atlas210x-215x/polls

Note: Please do not reply to this message. Poll votes are
not collected via email. To vote, you must go to the Yahoo! Groups
web site listed above.

Thanks!
| 90|87|2001-11-18 08:24:39|atlas210x-215x@yahoogroups.com|New poll for atlas210x-215x |
Enter your vote today! A new poll has been created for the
atlas210x-215x group:

In your point of view,Which is the weak
point of Atlas 210-x?

o Sensitivity
o Selectivity
o Audio fidelity
o VFO stability
o Frequency Dial
o Power consumption
o IF mixers
o Mic Amp
o Driver
o Power amplifier
o Carrier oscillator
o SWR bridge
o Antenna relay
o design of the front panel
o design of the box
o operation manual
o service manual
o power rating
o dimensions
o weight


To vote, please visit the following web page:

http://groups.yahoo.com/group/atlas210x-215x/polls

Note: Please do not reply to this message. Poll votes are
not collected via email. To vote, you must go to the Yahoo! Groups
web site listed above.

Thanks!
| 91|80|2001-11-18 15:35:46|uwsievers@web.de|Re: VFO|
--- In atlas210x-215x@y..., identical.
stability
that this
this a
Sorry, John I forgot to answer this befor.... no my unit hasn,t such
a problem... I think you should clean the contacts in the VFO-Vox
for this you have to remove the bottem cover of the VFO... the switch
can be accessed easyly... use a contact spray and switch several times
that shouls solce it... I don,t think the switch has to be replaced..
if yes that would be a hell of work and you may need a source where
to get a new one.... if there is any coupling on the rod running thru
all switches, refasten the setscrews on it..
Uwe
| 92|80|2001-11-18 15:54:56|kr0y@arrl.net|Re: VFO|
I've already tried cleaning the switch contacts. Also, the switch was VERY
VERY hard to turn. It was so hard that after turning it a few times, your
fingers would literally hurt from the grooves on the knob. I took part of
the switch out, removed one of the little metal balls that provides the
'detent', and re-shaped the metal piece that provides the 'pressure' against
the remaining metal ball. This helped a lot to reduce the amount of 'force'
necessary to turn the switch, but the problem of the VFO frequency shifting
still remains.

John
| 93|93|2001-11-19 03:58:17|maxrotax@yahoo.com|bandswitch-vfo|
All my atlasses do the vfo-shift thing to about the same
extent,looking at the way the coils are supported(not)it may
influence them mechanically and i toyed with the idea to cut the vfo
board apart with the coil supports on it to let it float with the
movement of the bandswitch.

Actually its not such a big deal and compares well with rest of the
rig in that it is fairly rudimentary in it's design,but has quite a
few nicety's about it,like;low power consumption,easily
repairable,easily available parts for most of them,light weight,very
nice xtalfilter and outstanding resistance to imd with strong signals.

personally i feel that some more research would have paid off before
the atlas was put in production,some things look as if they were done
in some haste,the vfo construction is one of those although i admit
its a very cleverly done and worked out concept which deserves better
layout of the parts so access would be better and stability increased
with mechanical movement.

After a closer look at the compartment i noticed that some wires were
either very close or even touching the shaft of the bandswitch.
this would have some influence on stability and after some careful
bending and re-arranging i have now moved all wiring that ran close
to the chassis ,the bandswitch shaft or anything else that would
influence the capacity when moved and it seems to have a positive
effect,even on 10 m. the bandswitch comes back reasonably close to
the frequency it was on before it was moved.
it still wobbles,but a lot less unpredictable,interesting
observation;it changes frequency more when moved vertically than
horizontally,don't ask me...........

To illustrate i put some discriptive pic's in the vfo folder in the
"pictures" section to show whats inside a 215 vfo,which is very
similar to a 210 exept for some different coils.
Guess the assembly personnel could have influenced the stability some
by arranging the wiring different,(no complaint,just a comment).

Uwe thanks for explaining the digital readout,it's clear what kind of
package it is now.

Maybe its an idea to share with us who the seller on e-bay is so he
has only one opportunity to do what he did,just a thought.
| 94|79|2001-11-19 04:14:37|maxrotax@yahoo.com|Re: Full of good idea's........|
--- In atlas210x-215x@y..., "Erik Westgard" heard of a
Can you tell us the difference,Eric?it would be intesting to find out.


I was thinking of making up a low power/QRP transmit board for my
Well,that should not be difficult,you know,all the parts are easily
obtainable,i have a 2n1307 as driver now and although i think there
is a better one out there it still produces something like 3 watts
output which is plenty to drive another pair of them to give you 20
to 30 watts push pull.
Probably forget about the swr protection system and design a pc board
that has little islands without holes just as a surface-mount system
to build the new pa.
have a look at the foto that shows how the flat pack transistor that
is mounted in a square hole cutout in the pcb with a mica insulator
inbetween the transistor and the heatsink.


max
| 95|95|2001-11-19 04:30:11|Stuart Liss|Anyone near Colorado?|
Hi,

I've been reading the atlas group email and would love to have some of the
improvements
made to my 210x. I don't have the ability. Is there anyone near Colorado who
has the time
and knowledge to check out my xcvr and add some of the modifications? How about
that
digital frequency display? I am leaving mine on because it drifts a lot if I
shut it off.

Stuart Liss
liss@...
Evergreen, CO
| 96|93|2001-11-19 05:26:05|kr0y@arrl.net|Re: bandswitch-vfo|
Is the bandswitch 210's and 215's hard to turn? My 180 was so hard, that it
hurt my fingers after turning it a few times.

John
| 97|93|2001-11-19 05:49:20|maxrotax@yahoo.com|Re: bandswitch-vfo|
--- In atlas210x-215x@y..., Well,i changed mine by removing some pressure of the springs that
push against the balls that locate the rotor,i just bend them back
some.

It is not exessively hard to turn,just a bit hard,if it hurts your
fingers you may want to find out why and maybe lightly lubricate the
shaft(only).

The shaft also runs through the housing of the vfo and clearance may
be a problem there,have a look at the back of the vfo and check for
signs on the shaft and clearance.

Do'nt just spray oil everywhere,just apply a little and give it time
to enter the shaft and housing.

max
| 98|98|2001-11-19 05:53:42|maxrotax@yahoo.com|CIRCUIT DIAGRAMS|
If you are looking for circuit diagrams check out the "files"section
sharyl spent quite some time scanning the atlas manual for another
complete set of diagrams which may apply to your particular atlas.

max
| 99|93|2001-11-19 06:25:13|kr0y@arrl.net|Re: bandswitch-vfo|
I also bent the springs back a bit that hold the little metal balls in
place. In fact, I removed one of the balls, and that also helped. However,
now the frequency shift is more noticable when the bandswitch is 'rocked'
back and forth a little bit.

Oh, and I already tried lubrication. Removing one of the metal balls and
bending the spring back on the remaining one, did more good than anything
else in terms of the 'tightness' of the switch. Now, if I can only get the
'frequency slop' out of the switch.

John

-----Original Message-----
From: maxrotax@... [mailto:maxrotax@...]
Sent: Sunday, November 18, 2001 9:49 PM
To: atlas210x-215x@yahoogroups.com
Subject: [atlas210x-215x] Re: bandswitch-vfo


| 100|98|2001-11-19 20:55:11|uwsievers@web.de|Re: CIRCUIT DIAGRAMS|
--- In atlas210x-215x@y..., maxrotax@y... wrote:
the "files"section
take also a look to
www.qsl.net/on6ab
there you have another copy of the manual, the chassis wiring and
all pc-cards..

Uwe DJ9XG
| 101|101|2001-11-19 21:08:45|uwsievers@web.de|Photos from MAX|
Again Max, you are doing a great job for the group... with your new
photos it,s much more easy to adjust the filters for transmitting.
Before, I had no idea which of the trim-capacitors is responsible for
which band now you,ve put all the several styles into this file...
I have even found space on the filter board for one more bandpass
(the place where the 160m can be placed) so if extending the Atlas
to one more band, the space on the tx-side is already there...
Meanwhile I,ve found out that for the preamplifier MAR-6 you can also
use as a direct replacement MSA-0685 or MSA-0686 these are more
available f.e. in Germany then the MAR-6.
These amplifiers can also be used as hy-gain pre-driver for Power-
Amplifiers... costs each about US$ 3 in Germany.
Uwe
| 102|102|2001-11-21 04:47:18|TLNixon@home.com|Just another Atlas 210 Fan|
Hi, Terry here in Davenport,IA. (WB0VQP)

I am as thrilled as a kid with a new toy with finding this group!

I have a 210 X with the Crystal Box, Console etc.

I am going to try to decipher all the mods. Especially the RX Preamp,
and Power control.

My 210-X is Virgin-unmodified and I will have to take some really
deep breaths before attempting to modify it.

Terry-WB0VQP
| 103|103|2001-11-22 00:36:03|maxrotax@yahoo.com|MMIC DATA |
Some of you may want to do the pre-amp addition,and i came across a
list of spec's for the more familiar mmic's so i gave them a place in
the "files"section.

Have a look if you're interested and see which one you want or can
get hold off.

MAX
| 104|104|2001-11-22 02:01:27|Terry Nixon|Re: MMIC DATA|
Thank You for posting that Max. I think I am going to have to read up on these devices a little bit first before I do the modification.
 
                              Terry-WB0VQP-Iowa
| 105|102|2001-11-22 05:02:09|maxrotax@yahoo.com|Re: Just another Atlas 210 Fan|
--- In atlas210x-215x@y..., TLNixon@h... wrote:
Preamp,
Terry,we're pleased to have you here,like yourself we all noticed
that this old design has some nice features.
One of which is that you can actually work on it rather than on some
surfacemount rigs.

My aim is to not overmodify it but bring it to a practical standard
where it becomes easy to operate it with good success and output and
receiver sensitivity are on top of the list as beiing lifted to
acceptable levels.

What would be really nice is that we build up a database in order to
compare the possibilities and see what is practical to achieve and
how to go about it.
One of the ways to do this is to create your own little list of spec's
and present it to the group.
be it in the data base or a message,i could then try to bring it in
the same format as in the database so we can compare stuff.

It seems a bit stuffy to do it that way,but it makes comparing very
clear and once its in the database that's it!

I had not ever done anything like working a database and played
around a bit and found it easy to fill in the fields.

It is really nice to know what's out there and see what needs to be
done to bring yours up to spec(which seems to be the most prominent
problem with these transceivers)

So,don't be shy,you're among friends;

MAX
| 106|102|2001-11-22 06:00:06|kr0y@arrl.net|Re: Atlas 180 VFO problems|
I'm still trying to figure out how to 'stabilize' the VFO in my old 180.
Comparing the 210x/215x and the 180, it appears that the VFO's are almost
identical, except that the 180 used compression-type trimmers for setting
each band and the 210x/215x used piston-type capacitors.

I've already cleaned the contacts on the bandswitch 'wafer' that switches
these compression capacitors in/out of circuit, but still, when the switch
contacts slide across each other, I get quite a bit of frequency shift of
the VFO, especially on 40,80, and 160 meters (20 meters isn't quite as much,
but still a lot more than I would expect).

Has anyone else run into this with a 210x/215x?

John
| 107|102|2001-11-22 11:12:29|Terry Nixon|Re: Atlas 180 VFO problems|
I may be speaking out of turn here, but I have found in most other equipment that when an oscillator starts drifting it is usually one of two factors. First hang a voltmeter on the  supplied voltage to the VFO, that is probably the culprit. It ould be a bad cap in the voltage regulator, or just a bad voltage regulator.
 
Second and harder to find is a cap that is changing value.
I have to be honest here, piston trimmers are much more stable than compression ones. I do not know if changing those out is a posibility or not, but it is something you might want to investivate.
| 108|102|2001-11-22 17:43:21|John Rayfield, Jr. - KR0Y|Re: Atlas 180 VFO problems|
The problem isn't 'drift', but is 'shift', apparently caused by changing capacitance through the bandswitch contacts, as the contacts 'slide' across each other.
 
I'm just wondering if anyone else has seen this specific problem in a 210x/215x.
 
   John
| 109|102|2001-11-22 23:17:48|Dave|Re: Atlas 180 VFO problems|
Hi John, and guys.

I would think the only solution to the vfo problems is to replace it with a
dds vfo. Simply extract it all, and fit the dds vfo with a digital readout.
Whilst the spectral purity of the vfo is okay, I don't believe anyone would
accept it's stability problems for long :-).

I agree with earlier comments regarding this rig. It was basically a good
theoretical design, but as a production transceiver it really never became
transposed from development to production, and the fitting of an mmic whilst
it may seem a good idea, would not enhance the rigs strong signal handling
capabilities at all.


Best Regards,

Dave G3VFP

| 110|110|2001-11-22 23:31:55|maxrotax@yahoo.com|bandswitch frequency shift|
John(and others)in order to help you better i would like some more
information from you,like a better description of how your particular
vfo looks like.

The way i get graphic images is to simply put my transceiver on top of
my flatbed scanner and select the appropriate scan-resolution,once i
am happy with it i save it as a jpeg file.
Surprisingly the scanner gives plenty of detail and sharpness at that
range up to 40 mm. away from the glass top.

At a guess i would say that yours is a fore runner of the 210 and
some refinements may be done to improve it.

As you probably found out the slightest change in capacity will shift
your vfo frequency around and the trick is to look for something that
may influence that shift.

in mine some of the wiring was actually touching the shaft and of
course influenced the capacity of the vfo.

Interestingly mine present the greatest shift in the higher bands as
opposed to yours.......

The waferswitches have tabs that contact the respective switch
contacts and therefore inherently change capacity in that way because
they are close to the screws that mount the switch to ground.

Having said all that there are a lot of 210's and the like out there
that function very nicely despite the fact that they shift a bit and
if you leave the switch alone during operation it may not influence
the qso at all.

The atlas is not a precision instrument and should not be expected to
behave like one,its rudimentary in build and void of refinements
i.m.h.o.,my ts520 has a much more stable vfo design as i am sure some
other transceivers have.

So,you would have to ask yourself to what extend does it influence
your frequency when you have a qso,because i don't think there is an
easy fix for this one.

Another thing worth mentioning is that my older vfo does not have
proper voltage stabilisation on the vfo board and instead relies on
the 8 v. stabiliser in the transceiver.
The later models have a zenerdiode on the actual vfo board,this does
not relate to your frequency shift,but i would just like to point it
out at this time,John.

MAX
| 111|111|2001-11-23 04:47:50|TLNixon@home.com|Where are those MAR-6 chips available?|
Just wondering where one could obtain those darned little things,
and how expensive are they?
| 112|112|2001-11-23 07:41:01|patalvarez@yahoo.com|Polls|
How do I cast my vote?
Each time the moderator creates a poll, an email invitation is sent
out to all members describing the question and answers. Just click on
the link provided to cast your vote. If you are already at the Yahoo!
Groups web site, go to the Polls area of your groups and follow the
instructions.

Open Polls

Poll question Votes Polling ends Vote Conclude Edit
Delete
Give a general score for Atlas 210x, in a scale of 1 to 10
11/18/2001 7 Vote Conclude Edit Delete
How did you get you Atlas 210x?
11/18/2001 5 Vote Conclude Edit Delete
In your point of view,Which is the weak point of Atlas 210-x? (you
can choose one or more item)
11/18/2001 9 Vote Conclude Edit Delete
How many years have you owned your Atlas?
11/18/2001
| 113|113|2001-11-23 14:19:01|michael.richter@team.telstra.com|Service Bulletins & Alignment Instructions|
Here are some rough scan-and-OCRs of the Service Bulletins and
Alignment Instructions I have kept since I bought my Atlas 210X on
March 21st, 1976.

My wife says I hoard useless stuff for decades - I believe I keep
irreplaceable items. Whether I spent more nights scanning more
material that I have depends on whether you tell me whether I'm right
or she's right !!!

Mike VK2BMM
| 114|113|2001-11-24 02:24:14|Gerhard.F.Wagner@t-online.de|Re: Service Bulletins & Alignment Instructions|
Dear Mike,
Your ATLAS Service Bulletins are very interesting, but somewhat difficult to
reaqd due to the OCR processing. Is it possible to get them as they come out
of the scanner? I have an ATLAS 210x of a friend which I will try to bring
back to life.
73 de Gerhard DF1DA

| 115|115|2001-11-24 08:24:29|michael.richter@team.telstra.com|Atlas Owners Survey based on 100 reader questionnaire|
In the Files section, I have loaded a scan-and-OCR of this survey
publishe din HRH magazine of March 1980.

The opening paragraph made an ominous announcement "Atlas was closing
its Amateur Equipment Manufacturing plant doors"

The best and worst features table was too dark to scan - not
surprisingly the best features were size, broadband (no tuning on
freq change for the first time) and ease of operation. The worst
features were Dial Mechanism, VFO drift and No Sidetone. The problems
were Final Transistor Failure, VFO drift, Will not load to antenna.

The in the second Fig 1 also did not scan in.

I will tidy up the Service Bulletins and Alignment File as I find the
time.

Mike VK2BMM
| 116|116|2001-11-24 14:08:38|michael.richter@team.telstra.com|Limited Edition difference|
Quoting from an Atlas document -

"The Limited Edition model is rated at 250 Watts PEP Input. 10 meters
is rated at 150 Watts PEP input. This power increase over the
standard 210x/215X has been accomplished by changing the final
amplifier design."

Mike VK2BMM
| 117|113|2001-11-24 15:31:34|Rick McKee|Re: Service Bulletins & Alignment Instructions|
You're right - she's wrong, it's a wife thing ! They all do it...

Rick, KC8AON

________________________________________________________________
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Juno offers FREE or PREMIUM Internet access for less!
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| 118|116|2001-11-24 16:52:11|Terry Nixon|Re: Limited Edition difference|
Anyone know what the differences are between the final circuits?? I am chomping at the bit!!
 
                                  Terry-WB0VQP
| 119|119|2001-11-27 00:01:41|maxrotax@yahoo.com|Alignment documents readability|
Thanks,Michael,again you have some interesting input for the group.

Initially i had trouble reading the alignment procedures,but after
"save target as;" and reading it with ms word and setting it 100% zoom
everything went really well.

There are some "fuzzy"area's but can be interpreted quite well if you
take the time.

Also on the part of the final transistors i have heard someone say
that he managed to increase power output to approx.150 watts by
substituting the finals for 2sc10.. (i forgot the exact number,sorry)
This may be of interest to someone with enough knowledge and
inclination to implement the mod(not me).

cheers MAX
| 120|120|2001-12-06 01:34:07|vk2bmm|Chassis Wiring Diagram 26 January 1977 posted|
I have saved to the Files section the latest Chassis Wiring Diagram
that I know of.

Mike VK2BMM
| 121|121|2001-12-06 03:55:14|vk2bmm|Reducing Distortion and FMing on Batteries|
Distortion and FMing when running on Batteries will occur if the 10
volt regulator loses regulation. The original 78L06 (Q1 on the
Chassis Wiring)will lose regulation when the input drops below 12.0
volts on current peaks.

I have replaced the 78L06 with a Low-dropout 5 volt regulator and the
3.9 volt Zener (D2) with a 5.1 volt zener.

The 10 volt supply is now stable when the input drops to 10.5 volt on
current peaks.

Mike VK2BMM
| 122|122|2001-12-06 03:59:54|vk2bmm|Reducing Receive Current|
The Atlas is ideal for continuous HF monitoring in low-power
situations because it has a fantastic low-current design taht no
modern transceiver can match. Not even the FT-817 - digital
synthesisers do draw serious current.

From memory almost half the standby current goes into the dial lamps.
I suggest replacing these with high-brightness LEDS- pick your
favourite color. Or emulate the latest transceivers and use the Dim
Switch to change between Blue and Orange LEDs.

Mike VK2BMM
| 123|121|2001-12-06 18:07:05|Dave|Re: Reducing Distortion and FMing on Batteries|
Hi Mike and guys.

Interesting your mod because I did a similar thing to my IC706MKII which
suffered fm ing when the battery level drops. All due to the regulator
feeding the pll board, or the lack off when the volts drop hi.

Regards,

Dave G3VFP


| 124|124|2001-12-07 07:07:01|donald ireland|atlas 210|
This is N8DI Donald Ireland i am restoring an Atlas 210 , i need to know if i can get a few parts. I need a tunning dial,the plastic round circle that gives the frequinceys. also a bottom cover for the radio. Please email if you know where i can get these items. Thanks 73's Don



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Send your FREE holiday greetings online at Yahoo! Greetings.
| 125|124|2001-12-07 16:56:03|charles_mackinnon@3com.com|Re: atlas 210|
Attachments :
Donald,
I also have an Atlas 210 (not a 210x) and was curious if you knew what the
major differences were? My 210 doesn't seem to be that far off the 210x
(but I may be missing a lot). Thanks for the consideration & 73!
Charlie (K9MAC)




donald ireland <iradiotree@yahoo.com
Please respond to atlas210x-215x@yahoogroups.com

Sent by: donald ireland <iradiotree@yahoo.com

To: atlas210x-215x@yahoogroups.com
cc:
Subject: [atlas210x-215x] atlas 210


This is N8DI Donald Ireland i am restoring an Atlas 210 , i need to know if
i can get a few parts. I need a tunning dial,the plastic round circle that
gives the frequinceys. also a bottom cover for the radio. Please email if
you know where i can get these items. Thanks 73's Don


---------------------------------
Do You Yahoo!?
Send your FREE holiday greetings online at Yahoo! Greetings.
(See attached file: C.htm)
| 126|124|2001-12-07 18:13:26|Dave|Re: atlas 210|
Hi guys.
 
I appear to have an attachment to Charles's mail to the group. Can the group owner please investigate this, and I hope remove attachments from the group's setup.
 
Regards,

Dave G3VFP
 
| 127|124|2001-12-07 18:33:37|Patricio Alvarez|Re: atlas 210|
Hi Dave the attachment that Charles sent is an html file that says:
 
This is N8DI Donald Ireland i am restoring an Atlas 210 , i need to know if i can get a few parts. I need a tunning dial,the plastic round circle that gives the frequinceys. also a bottom cover for the radio. Please email if you know where i can get these items. Thanks 73's Don

that´s all

73 & Dx from Argentina

Patricio LU5AKF

| 128|124|2001-12-07 18:48:35|Dave|Re: atlas 210|
Hello Patrick.
 
It really makes little difference what the attachment is, it should not be available within the group if for no other reason than to stop the spreading of viruses. I think it is very bad practice to allow attachments to reflector group emails.
 
Not sure how many more of you guys feel this way, but I hope everyone !
 
Regards,
 
Dave G3VFP
 
| 129|124|2001-12-08 05:18:45|Patricio Alvarez|Re: atlas 210|
Due to Dave request I´ve set up the group like this:
Posting Discussion is for members
Moderation Unmoderated
Attachments Email attachments are not permitted
Reply-to Replies go to all members of the group
Subject tag Atlas210x--
If someone wants to send a file , it can be uploaded al files section
regards
Patricio
LU5AKF



-----Mensaje original-----
De: Dave [mailto:g3vfp@...]
Enviado el: Viernes, 07 de Diciembre de 2001 01:47 p.m.
Para: atlas210x-215x@yahoogroups.com
Asunto: Re: [atlas210x-215x] atlas 210


Hello Patrick.

It really makes little difference what the attachment is, it should not be
available within the group if for no other reason than to stop the spreading
of viruses. I think it is very bad practice to allow attachments to
reflector group emails.

Not sure how many more of you guys feel this way, but I hope everyone !

Regards,

Dave G3VFP

| 130|124|2001-12-08 05:48:28|sasi nayar|Re: Atlas210x--> RE: [atlas210x-215x] atlas 210|
Hi Patrick and all on this list
Thanking Patrick and all others for the wonderful
resource on Atlas radios!
Boy, there are lots of those nasty bugs floating
around in all the discussion lists!
73's
Sasi
9V1SM / VU3SNM


=====
Amateur Radio For Global Peace and Fraternity
----------------------------------------------
Sasi Nayar, 9V1SM / VU3SNM,
Reef Ecology Lab, Department of Biological Sciences
National University of Singapore,10 Kent Ridge Crescent
Singapore 110 260. Tel : (65) 778 7112; Fax : (65) 774 9654;
URL:http://www.dbs.nus.edu.sg/lab/reef/SasiNayar.htm

__________________________________________________
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| 131|131|2001-12-08 12:37:37|Dave|Thanks Patricio|
Hi Patricio

I endorse wholehartedly the thoughts which Sasi raised, and my thoughts on
attachments were based upon experiences which other reflectors have had, and
of course non of us would wish for anything to be spread by our group
unintentionally.

Many thanks Patricio. This group is one of those which is of great help to
it's members, and long may it continue.

Best Regards,

Dave G3VFP

| 132|132|2001-12-15 00:26:31|Ian Lyckholm|Atlas-210x|
Hi everyone

I recently purchased a 210x from the US. I knew that it had something wrong with the transmitter but I thought it would be interesting to try and repair it. On 80m the output is only 4 watts and 30w for the other bands except 10m where you get 10w. I know that the problem is not in the PA section rather a lack of drive coming out of the PC200 board. How do I know? Well I injected a signal from a homebrew rig which is using a similar concept and I can get over 100watts out. Is there any information available as to different signal levels within the rig? A service manual perhaps.
Thanks
Ian Lyckholm
VK5MA Adelaide South Australia


[Non-text portions of this message have been removed]
| 133|133|2001-12-15 07:18:11|atlas210x-215x@yahoogroups.com|Poll results for atlas210x-215x |
The following atlas210x-215x poll is now closed. Here are the
final results:


POLL QUESTION: Give a general score for Atlas 210x, in
a
scale of 1 to 10

CHOICES AND RESULTS
- 1, 0 votes, 0.00%
- 2, 0 votes, 0.00%
- 3, 0 votes, 0.00%
- 4, 0 votes, 0.00%
- 5, 0 votes, 0.00%
- 6, 2 votes, 22.22%
- 7, 0 votes, 0.00%
- 8, 3 votes, 33.33%
- 9, 2 votes, 22.22%
- 10, 2 votes, 22.22%

INDIVIDUAL VOTES
- 1
- 2
- 3
- 4
- 5
- 6
- maxrotax@...
- wd9ghk@...
- 7
- 8
- uwsievers@...
- f6ebb@...
- patricio@...
- 9
- petef@...
- w3vet@...
- 10
- kc8aon@...
- iradiotree@...


For more information about this group, please visit
http://groups.yahoo.com/group/atlas210x-215x

For help with Yahoo! Groups, please visit
http://help.yahoo.com/help/us/groups/
| 134|134|2001-12-15 07:33:02|Patricio Alvarez|Herbert G. Johnson, W6QKI - Founder of Swan Electronics and ATLAS R|
TAKEN FROM http://www.qsl.net/on6ab/
ON6AB's ATLAS 210X / 215X Homepage

History

----------------------------------------------------------------------------
----

Herbert G. Johnson, W6QKI - Founder of Swan Electronics and ATLAS Radio Co

Herb Johnson was born November 10, 1920, in Pittsburgh, PA. The son of Swan
and Ruth Johnson, he spent his childhood in Astabula, OH. A lifelong amateur
radio enthusiast, he designed his first radio at age 14, and at age 15
earned his amateur radio operator's license.

After moving to Benson, AZ, he founded Swan Engineering (later, Swan
Electronics) in 1961. Originally working by himself out of his garage, Herb
created a line of radios that became a favorite of amateurs around the
world. Herb chose the brand name "Swan" in memory of his father, whose name
in his native land of Sweden, was "Sven". Upon arrival in the USA, his name
was Americanized to "Swan".

Swan Engineering grew rapidly, and its growth continued after Herb relocated
the company to Oceanside, CA, in 1962. At its peak Swan produced as many as
400 radios per month.

Needing more capital and engineering resources for Swan's rapid expansion,
the company merged with Cubic Corporation in 1967 and Herb continued
managing the Swan subsidiary until 1973. The Swan line of equipment was
mostly tube type design, and through the years more than 80,000 transceivers
alone where sold. Many Swan radios remain in service today, a tribute to the
quality that went into their design and construction.

Herb founded his second company, Atlas, in 1974. Atlas produced a line of
compact, rugged radios that became very popular for mobile communications
from cars and boats. Herb was particularly proud of the many explorers and
adventurers who used Atlas radios to stay in touch with the outside world
during their expeditions.

Herb was an avid sailor, skippering a series of boats (all named Vector) in
numerous long-distance races along the coast of California and Mexico. A
longtime member of the Oceanside and San Diego Yacht Clubs, he remained
active, continuing his pursuits in amateur radio and sailing, well into his
seventies.

After a period of declining health, Herb died of heart failure on January
31, 2000. He is survived by his wife, Mimi Johnson; his children Sven
Johnson, Tina Svalina, Les Johnson, Eric Johnson, and David Johnson; his
step-children Dave Callender, M'Liz McJones, and John Callender; twelve
grandchildren; three sisters and two brothers in Ohio; and one brother in
Maryland.




Patricio
-----
patricio@...
patalvarez@...


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| 135|132|2001-12-15 12:35:19|uwsievers|Re: Atlas-210x|
Hi Ian,
take a closer look to the Filter boards (the most important one is
the Pc-900 board located direct behind the PC100 board... may be a
toroid is broken, the swich plane is maladjusted, corrosion... in my
unit was a coupling loose of the rod running thru all switch planes..
the PC borads are common for all bands.. the vfo output is also the
same on all bands... (around 2,8-3,2 V PP on pin 13 of PC 100 board)
so if the PA-circuits are running ok it must be a circuit between the
PC-boards and the PA-stage... so once more have a look to the filters
mainly to the filters on the PC 900 board..
73 de Uwe DJ9XG


| 136|136|2001-12-17 12:37:23|Ian Lyckholm|Re: Atlas210x--> Re: Atlas-210x|
Hi Uwe
I have found the problem with the low Tx output. The If coils needed a little tweeking. That made all the difference. There is still a problem with the AGC but that is another story. Thanks for the reply..
Ian VK5MA
| 137|137|2001-12-17 15:27:15|oh2ev@sral.fi|Side-tone|
Hello you all. I have a 210x which I use without the console as a
mobile/portable rig. I would like to have a CW side-tone and a small
555-circuit would do the job I guess. Has any of you added this and
if so how did you connect it? I did build a cw-keyer inside the rig
and it's side-tone output I connected straight parallel to
loudspeaker and it works well. However, I would like to be able to
use my other keyers also, mainly memory keyer, so I need a separate
side-tone circuit inside the rig.

Esa, oh2ev


[Non-text portions of this message have been removed]
| 138|136|2001-12-17 19:35:53|RUDOLPH KING|Re: Atlas210x--> Re: Atlas-210x|
Hellp Ian:- try the following web site _ http://www.qsl.net/ON6AB/Index.html - where you will get a multitude of information concerning the Atlas 210X & 215X including the schematics, interconnection wiring diagram, and photographs
Glad to be of help
Rudy King
Rudyking@...

| 139|139|2001-12-18 04:03:26|customanalog|Hello All|
Just joined. Have a 210x with mobile mount and console. Seems to work
fine. Added a narrowband filter for CW work. I haven't even turned
the unit on in a couple of years. (Bad, I know.) Not very active
these days, but it's a cool unit. I fool with other stuff. Electric
cars,alternative energy...

Interesting note, for any adventurous types. I spoke in 1994 with the
gentleman who designed the unit. He has since passed on, but was very
helpful, and sent me an owner's manual. He pointed out the the unit
can be run on voltages as high as 28VDC with no problems since the
output transistors can take the voltage. If you are careful not to
key down or do other foolish things, you can get 400W PEP from the
210x with no problem. That's straight from the horse's mouth, no
disrespect intended. Just remember to keep the duty cycle low. He
also mentioned that some people who do this put forced-air cooling on
the heat sink, just to be safe. (Try it at your own risk. Your
mileage may vary.)
| 140|140|2001-12-18 04:22:11|customanalog|210X Tuneup|
Any 210x gurus out there? I've fooled with the internals of mine a
bit, but haven't had the inspiration or time to do a complete
alignment and tuneup. The unit works fine, but if anyone on the list
has the gear and experience to provide expert TLC, I'd be happy to
pay. Adjust the valves, oil change, rotate the tires, whatever it
needs to be in tip-top shape. :-)

Thanks! N1RWL
| 141|141|2001-12-18 04:30:37|mgaluvr@aol.com|Re: Atlas210x--> 210X Tuneup|
In a message dated 12/17/2001 8:23:17 PM Central Standard Time,
davidt@... writes:


As the old wise saying goes "if its not broke, don't fix it !"...you may
be opening up a can of worms.........Happy Holidays..........Bill in Missouri


[Non-text portions of this message have been removed]
| 142|141|2001-12-18 04:47:40|customanalog|210X Tuneup|
True, but I'm not looking to hotrod the radio, just check if anything
in the stock circuitry has drifted with age. Someone with the right
gear and 210x experience would know what to tweak and what to leave
alone. (OK, I'm an optimist.)

a
list
to
| 143|141|2001-12-18 06:49:57|RUDOLPH KING|Re: Atlas210x--> 210X Tuneup|
N1RWL:- If you are serious about having your Atlas serviced kindly contact the undersigned at tel #305-2346683 in Miami Florida or e-mail me at rudyking@...
Sincerely
Rudy King
Rudyking@...

| 144|144|2001-12-18 06:52:31|Stuart Liss|Re: Atlas210x|
I have 100 watts on all bands except 10m. On 10, Only 5 watts. Is this the same problem
described in the previous emails?

73s,

Stuart, WA2PQE
liss@...

Ian Lyckholm wrote:

| 145|145|2001-12-18 06:59:52|RUDOLPH KING|Re: Atlas210x--> Hello All|
To customanalog:- the information provided in your e-mail is not very accurate. While the PA Final power transistors may take a higher voltage than 13.8 volts the rest of the circuitry is designed for voltage input not exceeding the nominal 13.8 volts, especially the receiver stages some of which are common to both the receive and transmit circuits and the application of 28volts as suggested would definitely be harmful to the circuitry. This should not be attempted unless done by someone that knows how to acheive this.
Sincerely
Rudy King
Rudyking@...

| 146|146|2001-12-18 07:27:48|RUDOLPH KING|Re: Atlas210x--> Re: Atlas210x|
Hello Stuart(WA2PQE):- while various faults may have what seems to be the same symptoms this is not the case with your rig. Since you are obtaining 100 watts on all of the other bands the low power output experienced on the 10 meter band indicates a problem especially on that band and not in your IF stage.
The IF on these radios is operational on 5520, and is functional in both the receive and transmit circuit I would therefore suspect that you have other problems directly related to the 10meter band only. Give me a call at 3052346683 or e-mail me to discuss the problem
Sincerely
Rudy King
Rudyking@...

| 147|146|2001-12-18 10:02:13|Ian Lyckholm|Re: Atlas210x--> Re: Atlas210x|
G'day Stuart
The problem with my 210 was low power on all bands. In your case the problem is confined to just one band. This eliminates all common areas such as the IF and the pc200 board. I would look at the tx output on pin 9 on the pc200 board with an oscilloscope and compare the out put at full power with the other bands that are working. Logically they should be same because up to this point the circuitry is used for all bands. I would take a close look at the pc-900c tx input tuning, turn the band switch to 10m and work out which coils and caps are used on that band. Don't forget the pcb that lives behind the pa. Look for dry joints and any broken toroids. It wouldn't hurt to get some servisol spray and clean the ganged bandswitches.Give that a go. Would like a progress report.
Ian VK5MA Adelaide
| 148|145|2001-12-18 16:56:38|customanalog|Atlas210x and 28VDC|
Point is well taken! I was only relaying my conversation with the
designer. It is possible that he omitted that you should regulate
voltages for the other circuits. In any case, I agree that this mod
is for people SURE of what they are doing. I'm happy running my 210x
on 13.8 volts! Thanks again for the advice.



While the PA Final power transistors may take a higher voltage than
13.8 volts the rest of the circuitry is designed for voltage input
not exceeding the nominal 13.8 volts, especially the receiver stages
some of which are common to both the receive and transmit circuits
and the application of 28volts as suggested would definitely be
harmful to the circuitry. This should not be attempted unless done by
someone that knows how to acheive this.
work
the
very
on
http://docs.yahoo.com/info/terms/
| 149|146|2001-12-18 23:23:35|RUDOLPH KING|Re: Atlas210x--> Re: Atlas210x|
Hello Stuart:- Ian has given you some good advice, however that is assuming that all else associated with the rig is okay, by that I mean that your antenna for 10 meters is properly assembled and that the VSWR is acceptable.
The Atlas transceivers have a very efficient SWR protection circuit that when a high VSWR is detected it attenuates the RF power hence protecting the transistors in the finals in fact the protection circuit is so efficient that the manufacturer boasted that you could not damage the final transistors if you had a short circuit across the output.
I would advise that you first check the RF output using a reliable RF output meter coupled into a 50 ohm non inductive dummy load (not the antenna) to truly determine what the RF output is before venturing to play with the innards of the transceiver. Should you get an acceptable RF output reading then it would indicate that you have an 10 meter antenna problem. Incidentally be reminded that the RF output on 10 meters for these rigs is a bit reduced and would not indicate 100watts. This is listed in the manufacturer's specifications and is limited by the characteristics of the transistors used in the finals.All tests being made relative to a voltage input of 13.8volts D.C.
Best Regards
Rudy King
Rudyking@...
| 150|146|2001-12-18 23:53:36|Stuart Liss|Re: Atlas210x|
Hi Rudy,

I'll see whether I can borrow a dummy load.

The antenna and tuner I am using should work on all bands. It is a
210' long wire terminated into a 600 ohm 100 watt resistor. The other
end of the resistor goes into a ground rod with 10 radials. It loads
up as a SWR of 1.0-1.2:1 on 80 thru 15. On 10m, it seems to load
around 1.2:1.

What do you think of the other items on my 'list'?

Thanks,

Stuart, wa2pqe

--- RUDOLPH KING <rudyking@... __________________________________________________
Do You Yahoo!?
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| 151|146|2001-12-19 00:27:23|RUDOLPH KING|Re: Atlas210x--> Re: Atlas210x|
Hello Stuart:- your e-mail came in as I was replying to your first reply. I am now posting you the manufacturer's specifications on the calibration specifications for attenuation on the VSWR protection circuit

SWR Approximate Output NOTE
1.0 100watts High VSWR will not damage the
1.1 98 watts transceiver. Only Power Input and
1.2 95 watts Power output will suffer. Reflected
1.3 90 watts voltage will not damage the transceiver
1.5 80 watts
2.0 50 watts
3.0 20 watts

from the above if after checking the transceiver on a 50 ohm dummy load and determining whether on not it is to specifications you can then determine if the fault is in the transceiver or in the antenna and go from there.Please note that the above specs are based on the transceiver being matched into 50 ohms impedance
Sincerely
Rudy King
rudyking@...
| 152|152|2001-12-24 20:13:26|RUDOLPH KING|Digital Frequency Display|
For all ATLAS 210(210X) / 215 (215X) and similar transceiver owners

We can now replace your old vernier type dial readout with a DIGITAL FREQUENCY DISPLAY which fits within the transceiver and will display accurately the frequencies on all amateur radio HF spectrum bands

The new look will be very complimentary to your transceiver and the Digital Frequency Display, which fits within the bezel of the existing analog readout, gives your transceiver a very modern look.

By having this Digital Frequency Display installed, and because of its accuracy, you will know exactly what frequency you are operating on since it is better than the old analog readout and also does not require you to frequency and dial calibrate every time yoiu switch bands, as is needed with the analog readout. It also helps you to determine if your transceiver is subject to instability and frequency drifting.

For any queries or interest contact by e-mail - rudyking@...

Best Regards
Rudolph N. King


[Non-text portions of this message have been removed]
| 153|153|2002-01-03 16:21:57|Tilman D. Thulesius|Difference 210 210X ?|
Hi there

Have heard that teh 210 is not as good as the 210X.

So I schould get my hands off a 210 and go for a X.

Cannot the "non-X" me modified ???

/ Tilman
| 154|154|2002-01-04 00:42:33|RUDOLPH KING|Re: Atlas210x--> Difference 210 210X ?|
Hello Tilman:- you have heard correctly the 210 was the earlier version and did not provide the noise blanker option, in general the 210X was an improvement in circuit design, however to improve the 210 to the 210X standard it would require, if at all possible, you getting your hands on the "C" version of the 100 (First Mixer) and 200 (second Mixer) printed circuit boards, and also the coils for the 10 meter band (the 210X tunes a wider range of frequencies on this band).
These PC boards would plug in directly into the same slots and provide the 210X performance when installed in the 210 model radio.
For greater details you can contact the undersigned
Rudolph N. King
Rudyking@...


| 155|154|2002-01-04 09:15:50|Tilman D. Thulesius|Re: Atlas210x--> Difference 210 210X ?|
All

So bottom line must be. Keep fingers away from the "non-X".

With the Non-X you also have to do some severe mods to the PC100C.

I have not found any docs on these mods on the I-net.
Are there any out there ??

/ Tilman

RUDOLPH KING wrote:

| 156|154|2002-01-04 12:16:15|uwsievers|Re: Atlas210x--> Difference 210 210X ?|
Hello Tilman,
the 210 can me upgraded to 210X... all the PC-Boards can be modified
to the latest Version which is D (example the first Version were PC 100-A
the latest I have found is PC-100 D for the 1st MIxer and IF Amp)..
so what you have to do compare the Version which you have with latest
one which is D)... another item is that Atlas has changed the IF
Frequency and so the xtal filter... the older models have 5520 khz as
IF the newer one have 5645 khz... and of course the VFO frequencies
are also changed to the new IF...
another item are the ranges of the bands... the 210 has only 350 khz from
80-15m and 700khz on 10m... the 210x has 500 khz from 80-15 and 1 Mhz on
10 m... so if can get one which is cheap below US$ 2oo tthen it would
ber ok...
circiut diagramms should be all available on the Atlas page from the ON
ham.
By the way during the last 8 weeks I had the opportunity to buy 3
complete Atlas and 3 with missing parts.. so in total I have now 7
Atlas here 6 time 210x and one 215 X... I have just started to
complete the 3 part units... on these I will try several changes...
new PC 100(I have already one with a SRA-3H Mixer), PSK capapabilty
and additional bands ... I keep the group informed
73 de Uwe DJ9XG
| 157|154|2002-01-04 12:48:21|Tilman D. Thulesius|Re: Atlas210x--> Difference 210 210X ?|
Uwe

That sounds interesting.

I have 2 x 210 that I can get for a fair price. I do not know right now if
they are
non -X:es right now.

The PC100-mod ( SRA-3H ) looks quite interesting. Is that the Rohde DL7IY mod
mentioned
in cq-DL 2/80 ??
Is it worht the effort really ??
How about a preamp for 80 - 40 meters ?

I have a bad copy of the Article by DL1BT cq_DL 10/85.

Would be great if both of these articles could be scanned and put on PDF:s.

Have they used DRAKE-filters ( 5645 ) in the newer rigs ??

/ Tilman SM0JZT

uwsievers wrote:

| 158|154|2002-01-04 13:10:51|uwsievers|Re: Atlas210x--> Difference 210 210X ?|
Hallo Tilman,
the new xtal-filter has no indications that,s manufactured by Drake...
the size and the case of old and new style filter are the same... I
think they are from the same company..(Consulting Engeneers,
Phoenix,AZ)...
yes the PC 100 is the version from Detlev Rhode DL7iY... as I promised
I will scan the article from CQ-DL and put it here to the files part...
I didn,t so up to now, because I just got an empty Board and will it
put too onto this server... so if someone interested he can make his
own new PC-100 board... I have changed the circuit from DL7IY because
in the original description he has include a noise blanker so the
whole circuit became very complex... I never needed a NB so I removed
all parts and modified the diagram to my needs...
a new board will have a IE500 Mixer, a 2N5109 1st IF Amplifier and either
(not finally decided yet) a MAR8 Amp (solution from Max) or an 2N5109
amp with 50 ohms input/output impedance...
my today experiences with the DL7IY board compared to the original PC-100
board shows me a much better reception on 40m (very clear, no overload
symptoms by strong broadcast stations) and only a very little improvement
with the preamp on 10m... so normally I see no need for the additional
preamp... the original PC-100 from DL7IY has also not any more available
semiconductor types installed from TI p8002 which are high current FET
Types which are not more avaolable... as a substitution, if you want
to stay on FET Technology would be up to 4 J310 Fet,s in parallel...
the reason is the high current application (ID solution is to use instead the FET the mentioned 2n5109 which is
available without problems and will give you similar results..
73 de Uwe DJ9XG
| 159|154|2002-01-04 19:53:53|Tilman D. Thulesius|Re: Atlas210x--> Difference 210 210X ?|
Uwe

Wieder mahl sehr intressant.
Ja also wie gesagt. Der artikel von Detlev vuerde mich sehr intresseieren.
Ich hab grad noch ein paar P8000 so ich möchte es mit den versuchen.

Gibts es den da deine alternativen vie z.b der VN66AFD ??
Ja leider brauch ich ein NB hier auf 80 meter. Aber die ATLAS wuerde
ich in erster linie auf reise haben . Dann is meistens kein brauch fuer NB.

Schreib mir dann bitte wenn du die artikel eingelesen hast.

Alles gute von Tilman ( SM0JZT )

uwsievers wrote:

| 160|154|2002-01-04 21:48:54|Tilman D. Thulesius|Re: Atlas210x--> Difference 210 210X ?|
Rudy

Thank you for reply

It looks like Iám able to get hold of 2 x 210:s.

Looks like there are some interesting mods where you swap the whole
100-board for a completely different design

What is there on the 200C that is wrong on the 200A ??
Can you provide me with schematics for the 200A ??
Is that a fix that can be done without changing the whole card ??

I have seen som mods for the PC300 that looks fair.

Ok with the VFO limitations, I-am only interested in SSB-bart of bands
with this rig.

So what about the rest then in the 210 without X ??
Looks like I coudl be fine with the 210 then.

/ Tilman

RUDOLPH KING wrote:

| 161|154|2002-01-05 01:31:17|RUDOLPH KING|Re: Atlas210x--> Difference 210 210X ?|
Hello Tilman:- your e-mail received. I will reply to same on Monday(01/07/2002) as I am about to leave for Disney World with my grandson whom I had promised a few months back but could only spare the time now...
Until Later
Rudy King
| 162|154|2002-01-05 02:22:48|Erik Westgard|Re: Atlas210x--> Difference 210 210X ?|
Hi:
I could sure use a final amplifier board. I have a working 210x that is
just missing that part. I bought a pre-noise blanker board for my 210b on
e-bay that is now working.

Erik

-----Original Message-----
From: uwsievers [mailto:uwsievers@...]
Sent: Friday, January 04, 2002 4:16 AM
To: atlas210x-215x@yahoogroups.com
Subject: Re: Atlas210x--

Hello Tilman,
the 210 can me upgraded to 210X... all the PC-Boards can be modified
to the latest Version which is D (example the first Version were PC 100-A
the latest I have found is PC-100 D for the 1st MIxer and IF Amp)..
so what you have to do compare the Version which you have with latest
one which is D)... another item is that Atlas has changed the IF
Frequency and so the xtal filter... the older models have 5520 khz as
IF the newer one have 5645 khz... and of course the VFO frequencies
are also changed to the new IF...
another item are the ranges of the bands... the 210 has only 350 khz from
80-15m and 700khz on 10m... the 210x has 500 khz from 80-15 and 1 Mhz on
10 m... so if can get one which is cheap below US$ 2oo tthen it would
ber ok...
circiut diagramms should be all available on the Atlas page from the ON
ham.
By the way during the last 8 weeks I had the opportunity to buy 3
complete Atlas and 3 with missing parts.. so in total I have now 7
Atlas here 6 time 210x and one 215 X... I have just started to
complete the 3 part units... on these I will try several changes...
new PC 100(I have already one with a SRA-3H Mixer), PSK capapabilty
and additional bands ... I keep the group informed
73 de Uwe DJ9XG




To unsubscribe from this group, send an email to:
atlas210x-215x-unsubscribe@egroups.com



Your use of Yahoo! Groups is subject to http://docs.yahoo.com/info/terms/
| 163|163|2002-01-05 05:58:49|TLNixon|Digital Display for 210 X using normal frequency counter|
Is it possible to use a regular counter to read the Recieve and
Transmit Frequency. Has anyone done this. Is it necessary to build a
5645 khz oscillator, or can one tap into the one in the rig. How
about a mixer?

Terry-WB0VQP
| 164|164|2002-01-05 23:44:00|zl1ujg|Hi all|
Name is Kevin
Call is ZL1UJG
I have made a number of modifications to 1 of my 2 Atlas 210x's.

I have converted one for a transverter driver and I think I sold the
PA unit to Max ZL1BK.

Some of the modifications were to the 1st and 2nd mixers:
I made some measurements of the TX output spectrums and after
consulting some MINICIRCUITS application notes I believed that both
mixers were incorrectly configured. I did some simple re-engineering
and got LO rejection improvements of 15 to 35 dB
I did a similar mod to the 1st RX mixer with similar gains. On TX the
carrier rejection worsened though. Replacing the 5520 MHz or so
carrier oscillator with a sig gen confirmed that this was the
problem.This misterminates the mixer and also supplies ~ a square
wave.A modification has been worked out for this but not yet tried.

I have also done some work on the AGC detector.

Will document everything seperately and add to the file section
(sometime)

Kevin
| 165|164|2002-01-06 00:18:14|uwsievers|Re: Hi all|
Hi Kevin and welcome,
I,m very interested in your Modifications to the mixers... I have one
210X where I have installed a complete new PC-100 now with a high
level mixer SRA-3H ... it works excellent... but this mixer needs a
lot of RF-Power for the LO input... +17dbm !! so you have to install
a little transmitter, hi, to amplify the output of the VFO... on my
board it,s achieved by a broadband amplifier with an BF246C FET
Transistor ... so I have enough power for the high level mixer... I
will put the circuit diagram with the description (in German Language
because it was published in 1980 in the German Ham radio Magazine CQ-
DL) onto this server... it includes also both sides of the new PCB
Board.
So have look to this group the next days...
Uwe DJ9XG
| 166|166|2002-01-06 00:27:06|uwsievers|AGC Problem with the PC 300 board|
With one of my new Atlas Transceivers I have a problem with the AGC..
after switching from TX to RX it takes up to 2 minutes until the RX
begin to work again... the S-Meter is during this period on full scale
the problem is on the PC 300 board, because after swapping with
another one the problem is resolved... meanwhile I have made a lot of
measurements with the installed PC-300 and on the table with an
ohmmeter comparing the measurements with a good one.. no findings up
to now... when shorting the AGC Pin on the socket to ground for a
moment the receiver comes back immediately... so something is
loading up the AGC-Line to a level which is not within the designed
specs... the resistor on the Q301B 5,6Kohm which runs to ground is
ok...
so my question to group...
have anyone some helpful ideas?
the last thing I may have to change is the CA3086 IC because the
Q301B Transistor may have a problem...
Uwe DJ9XG
| 167|163|2002-01-06 01:25:43|Richter, Mike W|Re: Digital Display for 210 X using normal frequency counter|
Terry

You can't use a Standard Freq Counter because it will show the VFO Freq -
i.e the Operating Frequency +/- the IF Frequency.

I built a Frequency Display into my 210X by using an Up/Down Counter which
adds/subtracts the VFO and IF Freqs.

The Mixer approach is nuisance because you have to have switched filters to
pick the desired sideband.

Mike VK2BMM


-----Original Message-----
Is it possible to use a regular counter to read the Receive and
Transmit Frequency. Has anyone done this. Is it necessary to build a
5645 khz oscillator, or can one tap into the one in the rig. How
about a mixer?

Terry-WB0VQP
| 168|168|2002-01-06 01:55:02|Terry Nixon|Re: Atlas210x--> RE: Digital Display for 210 X using normal frequen|
Okay Mike next question is where did you get the kit or the display that you installed in your rig? Price and availability might help.

I was looking at a disigtal display kit that I think A&A was making, but was not sure if that would work or not.

Tery-WB0VQP


[Non-text portions of this message have been removed]
| 169|168|2002-01-06 02:10:16|Dave|Re: Atlas210x--> RE: Digital Display for 210 X using normal frequen|
Hi guys.

There have been a few ideas around on freq display counters using a pic
processor with A/D inputs. Using analogue voltages as offsets for IF's etc.
Not sure where I have seen these projects, but it sounds like an interesting
solution to direct freq readout on rigs with non standard IF
frequencies....like the Atlas :-).

Any thoughts on this guys ?.

de Dave G3VFP

www.g3vfp.com
| 170|168|2002-01-06 02:59:41|Terry Nixon|Re: Atlas210x--> RE: Digital Display for 210 X using normal frequen|
I have a device that MFJ built a number of years ago. It contained a crystal oscillator and mixer. The device does not have exactly the right crystal in it right now, but could be easily changed. It connected to the VFO and a counter connected to it. I was rather wary of connecting it to the VFo though fearing loading would rawy the oscillator down, but I am sure it probably has a high impedance input to keep that from happening.

To be honest, The little Atlas has not been out of use long enough to fool with it!!! I am getting ready to remount it in my mini-van now.

Terry-WB0VQP


[Non-text portions of this message have been removed]
| 171|171|2002-01-06 04:35:44|zl1ujg|Freq counters and agc|
Try AADE for frequency counters for atlas
And I think I had a problem with the AGC on one of my 210x.Check the
meter zero offset on the rig. It may back bias Q301B. Measure the
value of R313 to be 1 M ohm
Part of my AGC mod was to change R313 for 100 K ohms and put the cold
end (what was the earthy end) to the anode of D302.
The 100K and the 15 uF give a time constant of ~ 1 sec.
Part of the mod was to re engineer Q301A so that the output was a
emitter follower and gives a sinewave to the detector (not a
limited square wave as is the case)
Kevin
| 172|172|2002-01-06 05:17:15|Terry Nixon|Re: Atlas210x--> Freq counters and agc|
Okay is AADE a company? Where can I find out more about them?

Thanks
Terry-WB0VQP


[Non-text portions of this message have been removed]
| 173|173|2002-01-06 05:29:33|zl1ujg|aade|
Try www.aade.com

Kevin
ZL1UJG
| 174|174|2002-01-06 16:42:58|Rick McKee|10 METER RETUNE ?|
Group,

Has anyone tried retuning the 10 meter band to cover the CW & lower SSB
portion of the band ? Can it be done ? If so, what does it take to do
it ?

Thanks,
Rick McKee,KC8AON
Willow Wood, Ohio

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| 175|174|2002-01-06 16:48:26|sasi nayar|Microphone|
Hey folks,
I just got my 210X without the hand mic. Did yours
come with a mic? Is there anyway I can get one-second
hand?

If I decide to homebrew one myself, could someone send
me the specs and details like impedence, pinlay out,
and other relevan info.

I shall greatly appreciate hearing from this great
group.

73'
Sasi
9V1SM / VU3SNM

=====
Amateur Radio For Global Peace and Fraternity
----------------------------------------------
Sasi Nayar, 9V1SM / VU3SNM,
Reef Ecology Lab, Department of Biological Sciences
National University of Singapore,10 Kent Ridge Crescent
Singapore 110 260. Tel : (65) 778 7112; Fax : (65) 774 9654;
URL:http://www.dbs.nus.edu.sg/lab/reef/SasiNayar.htm

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| 176|176|2002-01-06 17:03:22|uwsievers|New files uploaded to the file area|
I have just uploaded 4 files (Atlas1.jpg to Atlas4.jpg) which are a
copy of an report from German Ham-Radio Magazine CQ-DL showing a
replacement for the PC 100 Board ....
the whole report is in German... so if you are interested only in the
circuit diagram download only atlas3.jpg..
the FET,s which are used are P8000 which are from Texas Instruments
today they are not any more available...
substitutes can be up to 4 J310 in parallel (necessary because of the
high current... total current of each P8000 must be adjusted to 30mA
via the source resistor... in my caes it,s an 33 Ohm instead the 150
ohm rsistors used in the circuit diagramm.. the differebces occur
because of the individual specs of these FET,s...
another alternative is to use the 2N5109 which is an excellent
substitution, but this one needs a voltage divider on the Base
because it,s not a FET...
If you don,t want to install the Noiseblanker (small Circuit diagram
on Atlas1.jpg) then you can simplify the circuit... the parts
surrounded with the dotted line are not vecessary... so go direct
from the drain of the P8000 right of the SRA-3H mixer to the toroid
TR 3...
the used toroids are from Siemens Germany.. but you can use those
from Amidon.
If you have questions please let me know....
the performance of this circuit is outstanding here in Europe...
you will have the calmest receiver... no other one of my many
transceivers have this performance on receive.
Uwe DJ9XG
| 177|174|2002-01-06 17:46:51|uwsievers|Re: 10 METER RETUNE ?|
no problem Rick,
you must adjust only one trimmer on the top of the VFO Box.. the hole
is marked 28,5Mhz... no other coils must be adjusted... the best way
is to switch on the calibrator, go to 28,8 Mhz (there is a hole in
the scale drum through which you will have access to the adjusting
point in the VFO-Box... then find the right direction in turning the
screw of the trimmer and then move the frequency down until you are
on 28.4 Mhz... then remove the screwdriver and check the frequency..
now the transceiver should work from 28-29 Mhz...
good luck
Uwe DJ9XG
| 178|174|2002-01-06 17:56:14|uwsievers|Re: Microphone|
| 179|176|2002-01-06 18:00:24|uwsievers|Re: New files uploaded to the file area..CORRECTION!!!!!!!!!!|
| 180|180|2002-01-06 18:12:21|Terry Nixon|Re: Atlas210x--> aade|
Thanks Kevin!

Do you have a digital display in yours?

I've been thinking about this for a long time. Is it really as simple as they make it out to be..2 connections to the external oscillator control, a ground and one capacitor through which to feed the VFO signal?

Terry-WB0VQP




[Non-text portions of this message have been removed]
| 181|181|2002-01-06 19:37:41|zl1ujg|10 M retune|
With my modified 210X I had to also tune the TX Bandpass filter for
optimum power (Its behind the 1st mixer PC100/ PC120 card).Very hard
without adapter card. Does anyone have any ideas on that? I Think the
RX filters also need alignment on my unit as the Rx sensitivity is
also down 4 dB. The change of tuning could also be due to aging of
course, so if your unit does not give this problem . Leave well alone?
The sensitivity of my modified unit is -118 dBm for 10 dB s+n/n on 10M
or 0.28uV and on 20M is -122 dBm for 10 dB s+n/n.(0.18 uV)
My second 210x (untouched) was -113dBm for 20M and -101 dBm for 10M so
that unit will need realignment.
Has any one else done sensitivity checks on their units?
Kevin
| 182|174|2002-01-06 19:50:00|Rick McKee|Re: 10 METER RETUNE ?|
Thanks Uwe ! Retuned the 210x to the lower portion of the band and it
works great ! I even took the dial drum out and relabled it to read
right by printing the numbers on peel and stick labels with the computer.
I then cut them out with a razor knife and attached them to the drum
right above the original 10 meter scale. This leaves both scales visible
just in case I want to retune it to the original configuration in the
future. The only problem I see is that the new numbers don't light up
like the originals do which might create a problem when operating in low
light conditions. Also, you have to elevate the front to real good to be
able to see the new numbers. These a slight problems considering what
you get in return !

Thanks again & best 73,
Rick McKee,KC8AON
Willow Wood,Ohio

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| 183|183|2002-01-06 23:09:05|Terry Nixon|Re: Atlas210x--> Re: Microphone|
I use a commercial GE microphone from the Master Exec or Progress line. They are made by Shure and work fantastic. I get just reave reviews on the audio, and they have a high level of output.

Terry-WB0VQP


[Non-text portions of this message have been removed]
| 184|183|2002-01-06 23:17:32|uwsievers|Atlas210x--> Re: Microphone|
you can also use an elecret mike... for this you should install 2 or
3 diodes (f.e. 1N4148) between the ground and the ground connection
of the mike connector in the radio... with these diodes you will
generate about 1,5-2,1 V to run the elecret mike... other mikes
(dynamic. etc) can still be used...
Uwe
| 185|174|2002-01-06 23:31:00|uwsievers|Re: 10 METER RETUNE ?|
Rick, to make a new scale with an additional marking for the new 10m
band you can do the following:
1. Remove carfully the current plastic-scale from the drum
2. Make a copy of on a copier
3. Modify the copy for your needs (add f.e. a 3rd line for the new 10m
band).
4.Make another copy from this modified scale on an so called "overhead
projector foil).. it,s transparent plastic before copying and after
copying the new scale. The light can shine through the numbers like
before...
then cut the platic copy to a new stripe and stick it again on the
drum by using sticking transparent plastic tape (sticking tape with
glue on both sides... you can get it even in the dollar-tree stores..
with htis mod the new scale looks like original with a 3rd. line
for the new 10m band...
if you want to switch backward to the old range vou can install a
little switch between the dial set and the mic gain knob on the front
panel ... with this swicht you put a trim-capacitor parallel to the
dial set capacitor..
switch open = old range
switch closed = new range (trim-capacitor adjusted to the new range)
with a little decrease of performance you can go down to 12 meters..
Uwe
| 186|181|2002-01-06 23:43:37|uwsievers|Re: 10 M retune|
Kevin I have several 210X and one 215X here these transceivers have
also different PC 800 and PC 900 boards... the modern ones have trimm
capcitors installed in an 90 degree angle to the board.. so you can
adjust them from the top without any problems...
if you really have a problem with your tx-board replace the current
trim-capacitors by new types and install them so on the board that
they are facing to the top..
the receiver board have also 2 different version...
one version is with standard coils (2 for each band on one core with 2
slugs) to adjust the lower one you need a special tool... Max shows
one on his files..
with these version you should not have any problem to adjust on each
band for maximum performance... adjust on coil to maximum 100khz from
the lower band edge, the other one 100khz to the upper band edge for
maximum...
the other version has for 80 and 40 m toroids with no adjustment
possibilties .. for 20,15 and 10m the procedure is the same as for
version 1.
Orientation for the receiver part: Behind the VFO-Box
for the transmitter part: Right of the VFO-Box
Uwe
| 187|187|2002-01-10 12:23:33|zl1ujg|Dial drum for 210x|
I am looking for a perspex frequency dial drum. The drum on my 2nd
unit is split side to side and had been glued together. Has anyone got
a spare dial drum from a parts only unit.
I have 2 pdf files with artwork for 2 new dials for 28.0 to 29.0 or 0
-1000 on the upper scale. If there is sufficient interest I will post
to files

Thanks

Kevin

ZL1UJG
| 188|152|2002-01-10 19:36:05|RUDOLPH KING|Digital Frequency Display|
Hello Atlas Owners:- sometime ago we posted that we can provide and install a Digital Frequency Display
which can either be installed internally, or if preferred external on the ATLAS210(210X) / 215 (215X) transceivers
replacing the analog dial readout.
Due to the many response we have had on this item and queries as to how it can be installed internally we are now posting jpeg photos which show the internal installation of the PIC Display with driver and preamp board.
The Digital Frequency Display will give accurate readout of frequencies up to 40MHz.
For further information contact rudyking@...
Best Regards
Rudy King


[Non-text portions of this message have been removed]
| 189|189|2002-01-11 01:41:01|Rick McKee|Re: Atlas210x--> Dial drum for 210x|
I would very much like to see the files for the new dial scales !


Rick McKee,KC8AON
Willow Wood,Ohio

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| 190|190|2002-01-11 04:38:37|Terry Nixon|Re: Atlas210x--> Digital Frequency Display|
Rudy,
Where do we view your product, and its description, as well as how it is installed and what it costs.

I have to be honest with you. I would much prefer modifying my own radio, as I have seen some real butcher-type mods done by other people. I am sure you do great work, but I am just wary of letting someone else do this, and I would NEVER allow the inside to be modified enough to permit an installation on the interior of the radio.

Terry-WB0VQP


[Non-text portions of this message have been removed]
| 191|189|2002-01-11 07:50:49|zl1ujg|Re: Atlas210x--> Dial drum for 210x|
The two files are loaded up on files section of the website. Not big
files...
The scales are that way so that most printers can fit them inside the
margins.
I printed my scale on a clear sheet then added a paper backing to fit
on the drum.
The 210x accuracy changes when used at 28-29 MHz. Not a major
problem.
Perhaps a diode doubler and amplifier could be used with the
oscillator running at about 11 MHz

Kevin ZL1UJG
| 192|190|2002-01-11 20:01:03|RUDOLPH KING|Re: Atlas210x--> Digital Frequency Display|
Hello Terry:- the following jpg attachments were posted on the ATLAS web site, however I am sending you directly for your viewing. I do agree with you that there has been some "butchering" observed on mods made by people who should not have been allowed to work on the radio in the first place.
There would require some chassis rework to fit the Digital Frequency Display internally on the transceiver, as follows:-
MODIFICATIONS TO CHASSIS:-
(a) The analog dial readout must be removed
(b) The facia panel cutout (where the dial was read) must be enlarged to 2.7/8" x 1.1/16", the bezel is then mounted in this cutout.
(c) The dial lamps mount which is on top the VFO box must be removed leaving only the pulleys for the VFO capacitor tuning.
(d) A 1/16" hole is drilled on top of the VFO box to accomodate mounting of the driver board insulated spacer.
MODIFICATION TO PIC DISPLAY BOARD:-
(a) approximately 3/32" requires to be cut off the top of the PIC board as supplied.
INSTALLATION OF DISPLAY & ASSOCIATED CIRCUITS:-
(a) The PIC Display is installed on the rear of the face plate against the bezel
(b) The preamp circuit board is installed against the rear panel LPF box
(c) The PIC driver circuit is installed mounted on an insulated spacer on top of the VFO box.
(d) Screened wiring is used to connect the three circuits together as directed in the circuit diagram supplied with the Display.
CALIBRATION OF FREQUENCY DISPLAY:-
(a) The frequency display driver board requires to be calibrated dependent on the IF frequency being used on the radio (will accomodate IF frequencies up to 16MHz).
(1) The pinout information to obtain LO drive is pins 2&3 on the VFO socket for drive and pin 4 for ground.
(2) 12VDC is taken from any convenient point on the radio and is converted to 5VDC regulated to supply the Digital Frequency Display circuits
EXTERNAL INSTALLATION:-
The Digital Frequency Display is mounted in a black plastic enclosure and the leads connected to the rear panel mounted VFO socket, of the radio, pins 2/3 and 4, plus the 12VDC supply.
It is best when external mounted to install the preamp board in the radio to avoid capacitive loading of the VFO due to long leads.
I trust that the above information answers your questions, you can call me also at 305 2346683 or e-mail me should you have further questions.
Regards
Rudy King
| 193|190|2002-01-11 20:07:29|RUDOLPH KING|Re: Atlas210x--> Digital Frequency Display|
Hello Terry:- The costs for the Digital Frequency Display are as follows:-
Standard Display :- USA $58.00 (black alpha/numeric)
Backlit option:- add USA $7.50 (yellow backlit)
Preamp Driver:- add USA $15.00
Installation/calibration/testing :- USA $50.00
External option:- add USA $12.00 (includes enclosure)
Regards
Rudy King

| 194|189|2002-01-12 04:01:26|Rick McKee|Re: Atlas210x--> Dial drum for 210x|
I downloaded the dial scales and printed them out, but they are shorter
than my original ! Is there some way to stretch the images in the pdf
files ?


Rick McKee,KC8AON
Willow Wood,Ohio

________________________________________________________________
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| 195|190|2002-01-12 06:00:13|Terry Nixon|Re: Atlas210x--> Digital Frequency Display|
Thanks Rudy,
Sorry I hope no one thinks I was saying that you do anything other than top-of-the-line work, I just hate to in my opinion "hyster" a collectible rig.

If I install a digital display, it will be as simple and non-invasive as I can do it, external to the rig.

Actually, my analog display is really extremely accurate, ever since I tweaked all the bands right on frequency the last time I was inside the rig.

Thanks Again

Terry-WB0VQP


[Non-text portions of this message have been removed]
| 196|190|2002-01-12 06:40:23|RUDOLPH KING|Re: Atlas210x--> Digital Frequency Display|
Hello Terry:- no offence was taken, my income is earned from the professional sales and service of "tactical communications equipment and systems" to friendly nations and military establishment worldwide and as head of my business Amalgamated Exporters Inc.. Ham radio is just a hobby and the service I provide to Atlas owners and of other brands of ham radio equipment remain just that .... a hobby.
Regards
Rudy King

| 197|152|2002-01-13 18:00:30|rudynking|Digital Frequency Display|
To all Atlas Radio owners:-
For those of you who replied to my previous post indicating that they
could not view the attachments showing the Digital Frequency Display,
we have now posted the photographs of the Digital Frequency Display
installed internally on the Atlas 210 radio.
This post is to be found under the PHOTOS section of the Atlas web
site.
For further information contact rudyking@...
Best Regards
Rudy King
| 198|198|2002-01-16 23:42:07|toledohamradio|210X HELP - Where Do I Start?|
I bought a 210X from a less than honest seller, and for the most part
it doesn't work at all. Any Ideas on where to start looking for
problems and solutions?
Here's what does work: lights-up, relays actuate when switching T/R,
volume (hiss) goes up and down with volume control.
Doesn't work: no transmit power, no reception at all (except very,
very faint international broadcast station on the top of 40 meters)
and the CAL does nothing at all either.
Where do I start? .... . .-.. .--.
| 199|198|2002-01-17 02:09:16|maxrotax|Re: 210X HELP - Where Do I Start?|
--- In atlas210x-215x@y..., "toledohamradio" part
T/R,
Hmmm,well,first thing is to look if the power supply is going to
where it should go.
there is a 8,5volt stabilizer i.c. with some orange wires leading
away from it.
it supplies some parts in the radio and is worth a check.
Of course you need the diagrams,if you don't have them check the
files section for a complete set of them(depending on model)in pdf
format by "cottage 5360".

Familiarise yourself with the radio and where to find the different
boards.

Next thing is audio,again check for power and use the voltage
chart,it may point you in the right direction.

At least it seems you have all the bits,thats importand especially
when you only have one transceiver,let us know how you get on.

Max zl1bk
| 200|187|2002-01-17 02:18:22|maxrotax|Re: Dial drum for 210x|
--- In atlas210x-215x@y..., "zl1ujg" or 0
post
Hello Kevin,nice to see you have an atlas as well,no i have not
bought your final board,i would have liked that though!
My scale was broken as well and i fixed it with acetone,which crept
in the gap and it became almost invisible,like the ad on tv with the
windscreen repair job.
It may take some time to settle and "dry"mine took an hour or so but
is fine now.
I am following your modifications with interest;
MAX zl1bk
| 201|201|2002-01-20 06:35:58|kc8aon|Homebrew Power supply for Atlas 210X 215X|
Just finnished building a Homebrew power supply for my 210X and
thought I would share the project with the rest of the gang. Go to
the files section and view atlaspwrsup.jpg for the schematic, and
pwrsupparts.txt for the parts list that includes Radio Shack part
numbers for some of the parts. It's similar in design to the original
Atlas power supply in the console unit, but instead of a zener diode
and pass transistor for regulation, I used an LM317T adjustable
voltage regulator and a 2N3055 pass transistor as an emitter follower
to up the current capacity of the LM317T. My power supply has been in
operation for most of the day with no apparent problems so far! Hope
you all enjoy!

Best 73,
Rick McKee,KC8AON
Willow Wood,Ohio
| 202|202|2002-01-27 21:49:25|tthulesius|Pics of my ATLAS 210/210x|
Hi there

I have made som pics of my ATLAS 210 / 210x.

You will find them on this URL:

http://medlem.tripodnet.nu/tilman/RADIO/index.html

The rigs have gott hott carrier shottkys by HP in
the first mixer. I plan though to put in new
PC100 with a Preamp and High level DBM
PC200 with a speechprocessor
PC300 with some extra amplification of VFO-signal.

/ Tilman SM0JZT
| 203|203|2002-01-29 22:59:15|Johnny Electron|Relay Replacement / Voltage Regulator|
Greetings:
Has anyone replaced either of the two relays in the ATLAS 210X ? If
so, what manufacturer/part number did you use?
Also, have any of you replaced the 8.5 Volt DC voltage regulator, and
if so, what did you replace it with?
73's


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| 204|203|2002-01-30 11:30:43|uwsievers|Re: Relay Replacement / Voltage Regulator|
Hi Johnny,
yes I,ve replaced the relay on the PC-100 Board..
First you need a lot of heat to remove the old Realy...
be careful not to destroy the patterns..
one method to avoid this... cut mechanically with a littel saw
all mechnical stuff of the relay from the board and desolder then
piece by piece from the board..
as a replacement I have installed 2 DIP Realys with 2 contact groups
each... so you have 4 in total, you need only 3 .. I have put these 2
Relays on a small board (size 1 inch by 1 inch), and handwired
the 3 contact groups to the PC 100 board... the 2 Relay coils have 12
V operating voltage and are wired parallel. These DIP Relays are
available from many manufactures (like Omron, ITT).. you can put them
into normal 14 Pin IC-Sockets, so for future Service they can easily
replaced..

The 8.5 V Regulator is no problem... it a simple 78L06 Type a standard
Voltage Reg... the ground lug is connected to ground via a resistor
and Z-Diode to ground, so you get instead 6 V from the Regulator in
total 8.5V... you seen this in the diagramm.. (the wiring diagram!!)
Godd luck and 73 de Uwe DJ9XG

--- In atlas210x-215x@y..., Johnny Electron and
| 205|205|2002-01-31 22:30:32|uwsievers|Manual and circuit diagrams for the Atlas 350 XL|
Since today I, m the happy owner of another fine Atlas Radio..
I bought for 100$ an Atlas 350-XL with the digital readout, but not
with the 2nd VFO. The radio has a problem in the PA stage.. power is
coming up for a moment, but then immediately shut down.. looks like
a protection circuit is in action... up to now I,ve no Documentation..
I,m looking for the manual with the circuit diagrams..
Is someone in this group who can help me?
73 de Uwe DJ9XG
| 206|206|2002-01-31 22:46:28|Gerhard.F.Wagner@t-online.de|Re: Atlas210x--> Manual and circuit diagrams for the Atlas 350 XL|
Dr Uwe,
Ich habe einen ATLAS350XL mit Manual. Scanne ich die Tage mal ein und lege
es auf meine ATLAS-Seite www.home.t-online/home/gerhard.f.wagner.
Bin derzeit etwas im Stress. Mehr zur Atlas Story später.
73 de Gerhard, DF1DA

| 207|206|2002-01-31 23:39:21|Uwe Sievers|Re: Atlas210x--> Manual and circuit diagrams for the Atlas 350 XL|
Gerhard,
das ist ja Klasse... bin hellauf begeistert hier in DL schon Hilfe zu bekommen....
gehe gleich mal auf die homepage..
erst einmal vielen Dank.
73 de Uwe DJ9XG
| 208|206|2002-02-01 07:43:21|Tilman D. Thulesius|Re: Atlas210x--> Manual and circuit diagrams for the Atlas 350 XL|
Alle

Das hört sich ja sehr intressant an.

Die adresse ist nur:

http://home.t-online.de/home/gerhard.f.wagner/

/ Tilman SM0JZT


Gerhard.F.Wagner@... wrote:

| 209|206|2002-02-01 10:42:19|Uwe Sievers|Re: Atlas210x--> Manual and circuit diagrams for the Atlas 350 XL|
Ja ich habe die adresse auch schon korrigiert und als bookmark gespeichert
Uwe



To: atlas210x-215x@yahoogroups.com
From: "Tilman D. Thulesius" <tilman@... Date sent: Fri, 01 Feb 2002 06:30:24 +0100
Subject: Re: Atlas210x-- 350 XL
Send reply to: atlas210x-215x@yahoogroups.com

[ Double-click this line for list subscription options ]

Alle

Das hört sich ja sehr intressant an.

Die adresse ist nur:

http://home.t-online.de/home/gerhard.f.wagner/

/ Tilman SM0JZT


Gerhard.F.Wagner@... wrote:

To unsubscribe from this group, send an email to:
atlas210x-215x-unsubscribe@egroups.com



Your use of Yahoo! Groups is subject to http://docs.yahoo.com/info/terms/
| 210|10|2002-02-02 17:36:58|atlas210x-215x@yahoogroups.com|New file uploaded to atlas210x-215x |
Hello,

This email message is a notification to let you know that
a file has been uploaded to the Files area of the atlas210x-215x
group.

File : /pc-100-v2.jpg
Uploaded by : uwsievers <uwsievers@... Description : New PC-100 Version 2

You can access this file at the URL

http://groups.yahoo.com/group/atlas210x-215x/files/pc-100-v2.jpg

To learn more about file sharing for your group, please visit

http://help.yahoo.com/help/us/groups/files

Regards,

uwsievers <uwsievers@...| 211|10|2002-02-02 17:37:33|atlas210x-215x@yahoogroups.com|New file uploaded to atlas210x-215x |
Hello,

This email message is a notification to let you know that
a file has been uploaded to the Files area of the atlas210x-215x
group.

File : /pc-100-v3.jpg
Uploaded by : uwsievers <uwsievers@... Description : New PC-100 Version 3

You can access this file at the URL

http://groups.yahoo.com/group/atlas210x-215x/files/pc-100-v3.jpg

To learn more about file sharing for your group, please visit

http://help.yahoo.com/help/us/groups/files

Regards,

uwsievers <uwsievers@...| 212|212|2002-02-02 18:02:23|uwsievers|New Files for the PC-100 Board|
I,ve just uploaded 2 files into the files area. They show (handdrawn,
sorry, but it was the fastest way). The version 2 can be installed on
the PC board I,ve uploaded some weeks ago, the DL7iY 002 Board)..
the Version 3 is a complete new one simplifying the previous one with
also excellent results.. in Version 3 I have include Max,s ideas with
a MAR-6 preamplifier... the version 3 has no printed circuit board yet

In both drawings I,ve not included the realy-circuit, which is on the
original board... you have to add it to the circuit diagram.. instead
the original relay I,ve used in Version-3 2 DIP Relays in parallel
for 12 Volts and each of them has 2 full sets of contacts... you
need 3 sets of contacts, so 1 set is unused... this is also a cheap
substitution for the original relay.
If you have question please let me know
73 de Uwe DJ9XG
| 213|213|2002-02-03 13:24:00|uwsievers|PC-100 Version|
Tilman hast just forwarded me a redrawn version of my one...
he made it with a program and it looks wonderful.. I have asked him
to put it into the files session.. after this I will erase my version
Uwe
| 214|10|2002-02-03 22:06:59|atlas210x-215x@yahoogroups.com|New file uploaded to atlas210x-215x |
Hello,

This email message is a notification to let you know that
a file has been uploaded to the Files area of the atlas210x-215x
group.

File : /PC100 ver 3.pdf
Uploaded by : tthulesius <tilman@... Description : Redrawn schematics of New PC100 with 7dbm mixer and HF-amp

You can access this file at the URL

http://groups.yahoo.com/group/atlas210x-215x/files/PC100%20ver%203.pdf

To learn more about file sharing for your group, please visit

http://help.yahoo.com/help/us/groups/files

Regards,

tthulesius <tilman@...| 215|215|2002-02-03 22:12:24|Johnny Electron|Troubleshooting PC200C on 210X|
I can use another communications receiver tuned to 5522KHz and tie
that antenna input to Pin 3 of the PC200-C board (IF input), and the
tuning of the Atlas 210X will change the stations and tune ok on the
other receiver. However on the 210X, I have virtually zero Audio at
Pin 5 (AF out), and no audio to speak of out of the Atlas 210x
speaker. Any ideas? Problem with 2nd mixer diodes? How can I test
to see if the Osc Input (Pin 7 on PC200C) is working correctly?
Thanks much,
J

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| 216|215|2002-02-03 22:27:11|Uwe Sievers|Re: Atlas210x--> Troubleshooting PC200C on 210X|
Johnny,
you should use either a RF-Probe with a Voltmeter or better an oscilloscope for the
measurements..
on PIN 7 of the PC 200 there should be a RF-Voltage of about 0,5 Volt eff.. or 1.5 V
peak to peak with a scope... the more important fact is to have a RF Voltage there...
if you have the manual go to page 29 and measure the voltages as shown in the Voltage
Chart on this page.
To check if the mixer is working you should go to transmit in CW with a low carrier
and measure on PIN 9 of the PC 200.. there should be a RF-Voltage of about 0,27 V
eff. or about 1 V pp... if not the MC 1350 is may be defective...
I don,t think that the mixer is the problem because it,s a passive circuit...
the only active part for receive and transmit is the MC 1350...
but again the easiest way is to measure the Voltage as shown on the top of page 29 of
the manual...
good luck and don,t hesitate to ask more questions...
73 de Uwe DJ9XG


To: Yahoo Group Atlas 210X <atlas210x-215x@yahoogroups.com From: Johnny Electron <toledohamradio@... Date sent: Sun, 3 Feb 2002 12:12:23 -0800 (PST)
Subject: Atlas210x-- Send reply to: atlas210x-215x@yahoogroups.com

[ Double-click this line for list subscription options ]

I can use another communications receiver tuned to 5522KHz and tie
that antenna input to Pin 3 of the PC200-C board (IF input), and the
tuning of the Atlas 210X will change the stations and tune ok on the
other receiver. However on the 210X, I have virtually zero Audio at
Pin 5 (AF out), and no audio to speak of out of the Atlas 210x
speaker. Any ideas? Problem with 2nd mixer diodes? How can I test
to see if the Osc Input (Pin 7 on PC200C) is working correctly?
Thanks much,
J

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| 217|217|2002-02-05 07:29:08|Johnny Electron|PC300D Diode??|
Could anyone on the list tell me if there is a 'undocumented'
added-on diode on their PC300D cirucuit card for the Atlas 210X? On
the foil side of the board there is a 7th diode that was added
underneath the big yellow .47/ WVDC capacitor. It appears to be
connected between the + side of the 47uF capacitor and Pin 6 of the
CA3086 chip. Can anyone confirm if it needs to be there? Been
pullin' out my hair trying to get this 210X working, and any help is
appreciated.
Thanks,
Johnny

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| 218|217|2002-02-05 11:00:17|Uwe Sievers|Re: Atlas210x--> PC300D Diode??|
Johnny,
there is nothing undocumented.... in VersionC and D there are in total 8 Diodes on
the board... 2 of them are connected to Pin 6 of CA3086... they are marekd as D303 and
D304..... D303 is running from Pin6 of CA3086 to Pin 18 of the board (ALC Input) and
D304 is connecte to a 100Kohm resistor and then connected to Pin 13 of the board
(Trans Key Line)...
do you have a manual and which Version have the cards? The Version is on the PC-
Cards (f.e. PC-300C where C is the version).
Uwe DJ9XG

To: Yahoo Group Atlas 210X <atlas210x-215x@yahoogroups.com From: Johnny Electron <toledohamradio@... Date sent: Mon, 4 Feb 2002 21:29:07 -0800 (PST)
Subject: Atlas210x-- Send reply to: atlas210x-215x@yahoogroups.com

[ Double-click this line for list subscription options ]

Could anyone on the list tell me if there is a 'undocumented'
added-on diode on their PC300D cirucuit card for the Atlas 210X? On
the foil side of the board there is a 7th diode that was added
underneath the big yellow .47/ WVDC capacitor. It appears to be
connected between the + side of the 47uF capacitor and Pin 6 of the
CA3086 chip. Can anyone confirm if it needs to be there? Been
pullin' out my hair trying to get this 210X working, and any help is
appreciated.
Thanks,
Johnny

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| 219|219|2002-02-05 15:31:28|Johnny Electron|Re: PC300 D diode|
Yes, the board is a PC300 version D, and there are 8 diodes (6
switching and 2 black silicon) on the component side of the board,
PLUS the one mystery switching diode (in question) on the foil side.
I was wondering if this extra diode was added by Atlas, or by a
previous owner, as it looks original.

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| 220|219|2002-02-05 15:57:52|Uwe Sievers|Re: Atlas210x--> Re: PC300 D diode|
Johnny,
what are the points in the circuit diagram the Diode on the foil side is
attached to?... may be it,s for some reason parallel to another one..
I, ve 6 different Atlas here but no one has an additional diode...
so take a look where it,s connected to.... and remove it and see what is happening..
Uwe

To: Yahoo Group Atlas 210X <atlas210x-215x@yahoogroups.com From: Johnny Electron <toledohamradio@... Date sent: Tue, 5 Feb 2002 05:31:26 -0800 (PST)
Subject: Atlas210x-- Send reply to: atlas210x-215x@yahoogroups.com

[ Double-click this line for list subscription options ]

Yes, the board is a PC300 version D, and there are 8 diodes (6
switching and 2 black silicon) on the component side of the board,
PLUS the one mystery switching diode (in question) on the foil side.
I was wondering if this extra diode was added by Atlas, or by a
previous owner, as it looks original.

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| 221|219|2002-02-07 05:49:59|toledohamradio|Atlas210x--> Re: PC300 D diode|
side is attached to?...

The diode anode (+) is connected to Pin 6 of the CA3086, and the
diode cathode (-) is connected to the (+) positive side of C311 (47uF
Capacitor).
I will remove it and see what happens. I could send a photo too if
there is a spot to put it.
73's
J
| 222|10|2002-02-07 08:19:23|atlas210x-215x@yahoogroups.com|New file uploaded to atlas210x-215x |
Hello,

This email message is a notification to let you know that
a file has been uploaded to the Files area of the atlas210x-215x
group.

File : /PC100 ver 3.pdf
Uploaded by : tthulesius <tilman@... Description : Updated schematics of the PC100 with +7dbm mixer and RF-amp.

You can access this file at the URL

http://groups.yahoo.com/group/atlas210x-215x/files/PC100%20ver%203.pdf

To learn more about file sharing for your group, please visit

http://help.yahoo.com/help/us/groups/files

Regards,

tthulesius <tilman@...| 223|219|2002-02-07 10:59:44|Uwe Sievers|Re: Atlas210x--> Re: PC300 D diode|
Hi Johnny,
this mod is a voltage doubler for the agc generation.... may be someone
had the feeling the agc is not good enough and made this mod... if you redraw
the parts involved for the agc generation then you will find that the additional diode
is used to increase the agc....
if you remove it not much will happen... may be only with very strong signals nearby..
I would recommend you to bring the PC 300 back to iit,s original state...
73 de Uwe


To: atlas210x-215x@yahoogroups.com
From: "toledohamradio" <toledohamradio@... Date sent: Thu, 07 Feb 2002 03:49:04 -0000
Subject: Atlas210x-- Send reply to: atlas210x-215x@yahoogroups.com

[ Double-click this line for list subscription options ]

side is attached to?...

The diode anode (+) is connected to Pin 6 of the CA3086, and the
diode cathode (-) is connected to the (+) positive side of C311 (47uF
Capacitor).
I will remove it and see what happens. I could send a photo too if
there is a spot to put it.
73's
J



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| 224|224|2002-02-07 23:33:35|toledohamradio|Ready to give-up on the 210X|
I'm ready to throw-in the towel (or the radio into the dumpster!).
I've been working on this 210X for a month, and still, no reception.
Audio is nearly zero. So far I've replaced Q101, the MC1350P chip,
the CA3086 on PC300D, all 4 FET's on PC300D, the LM380N chip (makes a
lot of heat only), and a dozen electrolytics. What am I missing?
I'm just shooting for reception on the ham bands - haven't even
started on the Xmit. Any words of widsom?
| 225|224|2002-02-08 00:40:33|Uwe Sievers|Re: Atlas210x--> Ready to give-up on the 210X|
Hi Johnny.
this sound very crazy to me... the LM380 should never become hot..
is there may be a problem with the loudspeaker or the leads to it or the
earphone connector?
Measure with an ohmmeter and disconnected Loudspeaker from Pin 15 to ground...
there should be no resistance ...
check the loudspeaker, too there should be a zero indication and a "knack"
sound in it when you connect the ohmmeter probes to the lugs of the speaker..
another fault possibility are the capacitors C321, C322 and C320... the last one is a
large one... the heat of the chip is definetly wrong may be there is a short on one of the
LM380 pins to ground
pin 14, 6, 8 and 1 of the LM380 chip should have a resistance I will make a resistance check of all card pins to ground ..see below!!
put the PC300 card on the table and compare my measurements on a good card with
yours... example is:
Black lead of Ohmmeter always connected to pin 3 of the removed card and the red lead
of the ohmmeter to the non ground pins... write the measurements in ohm down and
compare them with my ones...
Pin 1 = 35 kohm
Pin 2 = 4,3 kohm
Pin 4 = 1,7kohm
Pin 6 = 1,7kohm
Pin 8 = 1,7kohm
Pin 10 = 1,7kohm
Pin 12 = no indication
Pin 13 = 33kohm
Pin 15 = running from some kohm to Pin 17 = 5,7kohm
Pin 18 = 5,8Megohm
Pin 19 = 460ohm
Pin 20 = no indication
Pin 22 = no indication

in 16 is not connected
all other are ground

good luck
73 de Uwe DJ9XG
| 226|224|2002-02-08 03:29:56|RUDOLPH KING|Re: Atlas210x--> Ready to give-up on the 210X|
I would suggest that you contact rudyking@... who would probably be in a position to help you on the Atlas210 problems, he was factory trained and currently does repairs on these radios, and many other types including tactical radio equipment
An adhoc approach, and having others "guess" at what is wrong would get you no where other than frustrated as you presently seem to be, not forgetting that you may end up causing more harm to the circuitry, and end up with an expenditure for parts being replaced and still no joy in having the radio functioning. .... you need professional help to get this radio operational and back to specifications. It can be done.
Regards

| 227|224|2002-02-09 01:15:08|Dave|Re: Atlas210x--> Ready to give-up on the 210X|
Why do we see this advertising from rudyking ? Surely it is easy to simply
reply to the guy like others have done without going to the extreme of
promoting a business on the reflector. Our friend will undoubtably receive
proffesional help from fellow members of the group, which after all is our
purpose. Certainly Uwe has shown the right way in his last mail. If you want
to advertise Rudy, goto QST they will put a picture in as well.

Sheesh!!

Regards,

Dave.
| 228|10|2002-02-10 13:30:29|atlas210x-215x@yahoogroups.com|New file uploaded to atlas210x-215x |
Hello,

This email message is a notification to let you know that
a file has been uploaded to the Files area of the atlas210x-215x
group.

File : /PC100 ver 2.pdf
Uploaded by : tthulesius <tilman@... Description : Updated schematics ver 2 of PC100 by DL7IY/DJ9XG

You can access this file at the URL

http://groups.yahoo.com/group/atlas210x-215x/files/PC100%20ver%202.pdf

To learn more about file sharing for your group, please visit

http://help.yahoo.com/help/us/groups/files

Regards,

tthulesius <tilman@...| 229|10|2002-02-10 19:58:22|atlas210x-215x@yahoogroups.com|New file uploaded to atlas210x-215x |
Hello,

This email message is a notification to let you know that
a file has been uploaded to the Files area of the atlas210x-215x
group.

File : /PC100 ver 2.pdf
Uploaded by : tthulesius <tilman@... Description : PC100 with +17dbm mixer and mmic RF-amp

You can access this file at the URL

http://groups.yahoo.com/group/atlas210x-215x/files/PC100%20ver%202.pdf

To learn more about file sharing for your group, please visit

http://help.yahoo.com/help/us/groups/files

Regards,

tthulesius <tilman@...| 230|230|2002-02-10 20:01:46|Tilman D. Thulesius|Re: Atlas210x--> New Files for the PC-100 Board|
Uwe

Hattest du boards gemacht fuer die version 2 och der 3 ??
Ich hab so keine möglichkeit boards zu machen.
Hättest du ein ( oder 2 ) fuer mich ueber ??

/ Tilman

uwsievers wrote:

| 231|230|2002-02-10 20:34:04|uwsievers|Re: Atlas210x--> New Files for the PC-100 Board|
Hallo Tilman,
mein normaler email provider funktioniert heute nicht..
habe eben per Zufall deine Message hier gelesen..
kann dir aber leider keine Platine geben... habe hier eine
Reserveplatine von DL7iY gehabt für die Version 2 und die Version 3
ist auf einer Lochrasterplatine handverdrahtet...
hatte schon mal nachgeschaut ob es hier die Rohlinge gibt.. leider
nicht... muss man halt selber ätzen, oder einen anderen Sockel
einbauen für den es Rohlinge gibt.
73 de Uwe
| 232|10|2002-02-16 19:32:18|atlas210x-215x@yahoogroups.com|New file uploaded to atlas210x-215x |
Hello,

This email message is a notification to let you know that
a file has been uploaded to the Files area of the atlas210x-215x
group.

File : /review-2.pdf
Uploaded by : uwsievers <uwsievers@... Description : HRH Review in PDF-Format

You can access this file at the URL

http://groups.yahoo.com/group/atlas210x-215x/files/review-2.pdf

To learn more about file sharing for your group, please visit

http://help.yahoo.com/help/us/groups/files

Regards,

uwsievers <uwsievers@...| 233|10|2002-02-16 19:34:42|atlas210x-215x@yahoogroups.com|New file uploaded to atlas210x-215x |
Hello,

This email message is a notification to let you know that
a file has been uploaded to the Files area of the atlas210x-215x
group.

File : /servec-2.pdf
Uploaded by : uwsievers <uwsievers@... Description : Service and Alignment in PDF

You can access this file at the URL

http://groups.yahoo.com/group/atlas210x-215x/files/servec-2.pdf

To learn more about file sharing for your group, please visit

http://help.yahoo.com/help/us/groups/files

Regards,

uwsievers <uwsievers@...| 234|234|2002-02-16 19:40:00|uwsievers|VK2BMM Files converted into PDF-Format|
I,ve just uploaded the 2 Word-Files from VK2BMM now converted into
the better readable PDF Format... there are still some unreadable
parts in the new files, but the most important ones are now good
readable...
the contents of the servec-2.pdf are very helpful... a lot of good
service infos are now available... most important for me are the
improvements for reception with additional traps and how to adjust
them...
I hope this is helpful for you, too... the other files were very
difficult to read.
73,s de Uwe DJ9XG
| 235|234|2002-02-16 19:55:12|sasi nayar|VK2BMM Files converted into PDF-Format|
Uwe,
Very interesting and a great resource. Thanks! The
first file has a couple of figures missing? Atleast it
didnt show up here. Was it missing in the original
file?
73
Sasi
9V1SM / VU3SNM




=====
Amateur Radio For Global Peace and Fraternity
----------------------------------------------
Sasi Nayar, 9V1SM / VU3SNM,
Reef Ecology Lab, Department of Biological Sciences
National University of Singapore,10 Kent Ridge Crescent
Singapore 110 260. Tel : (65) 778 7112; Fax : (65) 774 9654;
URL:http://www.dbs.nus.edu.sg/lab/reef/SasiNayar.htm

__________________________________________________
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| 236|234|2002-02-16 20:07:53|Uwe Sievers|Re: Atlas210x--> VK2BMM Files converted into PDF-Format|
I have no other source then the original files from VK2BMM... so please ask him I made
only a conversion run to create the pdf-files... because I can,t read the original ones...
Uwe

To: atlas210x-215x@yahoogroups.com
From: sasi nayar <vu3snm@... Date sent: Sat, 16 Feb 2002 09:55:10 -0800 (PST)
Subject: Atlas210x-- Send reply to: atlas210x-215x@yahoogroups.com

[ Double-click this line for list subscription options ]

Uwe,
Very interesting and a great resource. Thanks! The
first file has a couple of figures missing? Atleast it
didnt show up here. Was it missing in the original
file?
73
Sasi
9V1SM / VU3SNM




=====
Amateur Radio For Global Peace and Fraternity
----------------------------------------------
Sasi Nayar, 9V1SM / VU3SNM,
Reef Ecology Lab, Department of Biological Sciences
National University of Singapore,10 Kent Ridge Crescent
Singapore 110 260. Tel : (65) 778 7112; Fax : (65) 774 9654;
URL:http://www.dbs.nus.edu.sg/lab/reef/SasiNayar.htm

__________________________________________________
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| 237|234|2002-02-18 01:37:18|Richter, Mike W|VK2BMM Files converted into PDF-Format|
These OCRs were just a first/second pass to see what interest there is in
these docs.

If someone wants to do more work I can send the document scans as GIFs
without OCR conversion - it will just take up lots of storage space !!!

Mike VK2BMM
| 238|234|2002-02-18 08:15:30|sasi nayar|Re: Atlas210x--> VK2BMM Files converted into PDF-Format|
Mike,
These are pretty interesting info that, I am sure,
most Atlas users would want to hear about their most
treasured rigs. Would it be possible for you to have
them uploaded them to the files section? May we know
how large these files are?
Cheers and 73'
Sasi
9V1SM / VU3SNM

--- "Richter, Mike W"
<michael.richter@... =====
Amateur Radio For Global Peace and Fraternity
----------------------------------------------
Sasi Nayar, 9V1SM / VU3SNM,
Reef Ecology Lab, Department of Biological Sciences
National University of Singapore,10 Kent Ridge Crescent
Singapore 110 260. Tel : (65) 778 7112; Fax : (65) 774 9654;
URL:http://www.dbs.nus.edu.sg/lab/reef/SasiNayar.htm

__________________________________________________
Do You Yahoo!?
Yahoo! Sports - Coverage of the 2002 Olympic Games
http://sports.yahoo.com
| 239|234|2002-02-18 10:04:45|tthulesius|Re: VK2BMM Files converted into PDF-Format|
Mike

I would love to have a OCR-run on your GIF:s.
There is a lot of editing needed. But I think it
would be worth while the effort to get this material
properly done for all the ATLAS-friends.

I would the be puttng the material up properly as pdf:s.

I have "broadband-access" so I can cope with the filesize of the gifs.

/ Tilman SM0JZT tilman@...


is in
GIFs
space !!!
| 240|240|2002-02-18 14:21:31|Tilman D Thulesius|Re: Atlas210x--> Re: VK2BMM Files converted into PDF-Format|
I have aleady converted the files to proper
Word-documents with proper formatting.

Graphics need to be cut from the GIF:s ( Waiting for Mike here )

When all that is done I will convert to pdf and upload.

/ Tilman SM0JZT
| 241|240|2002-02-18 17:10:19|sasi nayar|Re: Atlas210x--> Re: VK2BMM Files converted into PDF-Format|
Thanks Tilman and Mike. We are looking forward to
seeing it! Its a great piece of info
73'
Sasi
9V1SM / VU3SNM


--- Tilman D Thulesius <tilman@... =====
Amateur Radio For Global Peace and Fraternity
----------------------------------------------
Sasi Nayar, 9V1SM / VU3SNM,
Reef Ecology Lab, Department of Biological Sciences
National University of Singapore,10 Kent Ridge Crescent
Singapore 110 260. Tel : (65) 778 7112; Fax : (65) 774 9654;
URL:http://www.dbs.nus.edu.sg/lab/reef/SasiNayar.htm

__________________________________________________
Do You Yahoo!?
Yahoo! Sports - Coverage of the 2002 Olympic Games
http://sports.yahoo.com
| 242|234|2002-02-20 09:47:20|Richter, Mike W|VK2BMM Files converted into PDF-Format|
On the weekend I will scan in the docs that did not work well as OCRs and
send them as GIFs to Tilman

Mike VK2BMM

| 243|234|2002-02-20 13:15:09|Tilman D. Thulesius|Re: Atlas210x--> VK2BMM Files converted into PDF-Format|
Mike

Great stuff !!

I have sorted most of the text but there is some outstanding on the once with

the graphics ( Service Bulletine 1, 4, 7 and 11 ).
The bulletin 10 is completely strange right now.

I have not done any on the conversion to CB . Whoever would do tha ;- )
......

So we are nearly there to publish the pdf:s

Iám also working on a proper OCR-reading on the Manuals for the
210/215 and 210/215x.. So stay tuned on those also in pdf.

/ Tilman SM0JZT



"Richter, Mike W" wrote:

| 244|244|2002-02-25 08:06:13|fd0u1680|Nothing but Static on 215X|
Hi,
I recently acquired a 215X, and found it only produces static, and
no txmit. I have the manual, and have been trying to figure out
the problem, but I am at a dead end. I'm no electronics tech, but I
made some measurements and observations which I am
including. I have spent the better part of 2 weeks on this thing,
and I have about had it. I hope someone can help me out.

Thanks much in advance, and 73.

-Karl (kg6adq)

All tests conducted using a small, 3A desk supply.

PC-100D:
Term Strip RX TX
1 0.00 0.00
4 0.00 1.43 #
7 0.01 0.01 #
10 13.74 13.59
11 13.74 13.59
13 10.72 10.15
14 9.09 9.40 #
15 3.40 3.20
16 3.40 3.40
17 13.75 13.64
18 13.75 13.64
19 3.40 13.64
20 12.92 0.00
21 3.40 13.64
22 0.00 13.58

Q101:
Base 5.02 5.33
Coll 10.75 10.96
Emit 4.31 4.77

Notes:
# denotes DC voltage read with RMS voltmeter and
homebuilt RF Probe (using germanium diode).

I measured a 5645 KHz signal off pin 13 with a spectrum
analyzer and a direct connection (no probe).

I tuned in the LO (VFO) signal from pin 4 of
PC100D with another receiver.

I tuned in the calibrator signal from pin 1
of PC100D on an external receiver.


PC200:
Term Strip RX TX
1 13.74 13.61
3 3.03 3.03
5 0.0 0.0
7 0.50 0.00 #
9 0.0 0.0 #
11 0.00 0.00
13 0.00 0.00
14 0.00 3.75 #
16 0.00 0.00 #
17 0.10 - 0.05 0.00 ++
19 4.23 3.99
20 3.40 3.62
21 9.73 9.73
22 3.40 3.40

Q201:
1,2,8 9.39 9.39
4 3.00 3.00
5 4.32 4.18
6 3.00 3.00

Q202:
1,5 0.00 3.87
2,4,14 0.00 2.50
3 0.00 1.76
6 0.00 1.50
7 0.00 0.97
8 0.00 3.87
9 3.80 3.57
10 3.20 2.94
11 9.73 9.73
12 0.00 0.90
14 0.01 2.50 (not 0.25)

Notes:
++ Voltage on RX started out at 0.1V and dropped
steadily to about 0.05V.

Replaced CA3086, no change.

Replaced diode ring.

Measured RF voltage at pin 9 and put into Txmit
on CW full carrier into dummy load, 0.0 Volts

Monitoring pin 7 or 9 with the spectrum analyzer
let's me see the VFO signal, and can move it around
using the tuning knob. Calibrator knob allows for
calibration.

I can see the IF signal at 5645 KHz by touching
pin 3. This only works with a direct connect to
the analyzer, the RF probe shows nothing. Also,
I can hear stations (not in the ham band) when I
do this, faintly.

PC300D:
Term Strip RX TX
1 0.00 13.00
2 13.00 13.00
4 0.00 1.45 #
6 0.57 1.84 #
8 0.55 0.00 #
10 0.00 0.00 #
12 0.00 0.00
13 12.92 0.00
15 0.00 0.00 VAC
17 4.26 3.99
18 0.00 varies with ALC
19 9.72 9.72
20 0.02 0.00
22 0.00 0.00

Q301:
1,5 7.32
2,4 1.88
3 1.16
6 4.65
7 3.94
8 9.73
12 1.89
13 1.16
14 4.27 +=

Q302:
1 6.93 0.69
6 0.00 0.00
8 5.84 1.83
14 13.75 13.75

Notes:

Replaced CA3086
Checked R315, R307, C313, C316 OK.
+= Voltage drops from about 11.75 to 4.27 V
across R307. Why????

Pin 4 has LO signal (from PC100).

Measurements with 150 MHz scope and 10X probe (not RF)
on pins 4, 6, 8, and 10 mimick the measured RF
voltages. I can see a strong waveform for those
pins that had nonzero voltage readings.


PC500:
TX
Q501:
Base 4.11
Coll 11.04
Emit 3.40

Q502:
Base 4.60
Coll 13.25
Emit 0.80

Q506:
Base 1.10
Coll 13.00
Emit 0.60

Q504, Q506 (I dont remember which is which)
Base 0.00
Coll 13.75
Emit 0.00

Base 0.60
Coll 13.75
Emit 0.00
| 245|245|2002-02-26 04:51:34|RUDOLPH KING|Re: Atlas210x--> Nothing but Static on 215X|
Hello Karl:- I have read with some concern your obvious frustration at not getting the Atlas 215 to function.
First off you state that the power supply you are using is a 3 Amp PSU this will not do at all for the transmit function since the Atlas 215 when properly working can draw between 10 to 16 amps on transmit dependent on the band selected. A properly regulated 3 Amp power supply can assist in servicing the receiver circuits only as the current draw in receive do not exceed 500mA when 13.6volts DC is applied - (nominal 12 VDC)
It would seem that most every one attempting to service their Atlas radios relies on voltage measurements primarily, while voltage measurements are good indicators for a working radio it is not the most reliable means of servicing these radios however.
You would be better off applying a signal from a "Signal Generator" and following the applied signal through the various circuit boards using your Oscilloscope., and analysing the wave forms, or loss of wave form which would tend to indicate where the fault lies.
Should you need help you can e-mail the undersigned or call me at 305 234 6683 in Miami
Best Regards
Rudy King
rudyking@...



| 246|244|2002-02-26 13:45:10|uwsievers|Re: Nothing but Static on 215X|
Hello Karl,
I went thru your Measurements... I,m sure the problem you have is
related to the VFO signal f.e. the Signal on Pin 4 during receive must
me around 0,5 V eff. or 1,5 V pp with a scope.. you have nothing there
..on the same Pin is during transmit the DSB signal combined from AF
(Mike) and the carrier oscillator..

PC 100D

PC 300 D

on this Card you must have the VFO-Signal on

Pin 10 about 0,5V eff.
Pin 4 also about 0,5V eff.

before you do anything else... measure on Pin 10 of the PC 300D
card for the VFO signal... if there measure Pin 4 on the same card
during receive... it must be the same signal as on Pin 10...
if it,s on Pin 4 available (I don,t believe it) then go to Pin 4 of
the PC 100D card that,s the Input VFO signal of the 1st mixer..

If you have no signal on Pin 10 of PC 300D then you have a problem
with the VFO... if you have no signal on Pin 4 of PC 300D then you
have a defective FET Q 303 0r Q304 on the PC 300D card.
Please let me know your measurement results on these 3 pins before
you do more.
73 de Uwe DJ9XG
| 247|244|2002-02-26 19:29:06|fd0u1680|Re: Nothing but Static on 215X|
Dear Uwe,
Thanks for the advice. I will check the things you say.
Today, I made some measurements with the radio off, and found
that every single tang on the bandswitch wafer (inside of
radio, near the back) is grounded. The antenna center
conductor is grounded, and many tangs on the bandswitch
wafer (inside of radio, near VFO tank) is grounded. I did this
with PC100, 200, and 300 out of the radio. I am going to
try to change the SO239 connector and see if it fixes it,
otherwise I can't understand why everything is grounding.
Also, where the antenna center conductor connects to the SWR
board, I can trace grounds through to the RF board. It seems
nuts!

Thanks again for looking at my data. I really appreciate the help.
-Karl

-- In atlas210x-215x@y..., "uwsievers" there
AF
| 248|245|2002-02-26 19:46:32|fd0u1680|Re: Atlas210x--> Nothing but Static on 215X|
Hi Rudy,
thanks for the advice. I have a signal generator that can produce
either AM, FM, or PM modulated signals with frequencies from
a few Hz to a couple MHz. It is an old Wavetek. So maybe I should
try to use it more effectively in my tesing.

Thanks,

-Karl

| 249|10|2002-02-26 21:44:41|atlas210x-215x@yahoogroups.com|New file uploaded to atlas210x-215x |
Hello,

This email message is a notification to let you know that
a file has been uploaded to the Files area of the atlas210x-215x
group.

File : /ATLAS 210 Service bulletins and papers.pdf
Uploaded by : tthulesius <tilman@... Description : ATLAS 210 Service bulletins ( from VK2BMM ) - OCR read with uncertains text in red.

You can access this file at the URL

http://groups.yahoo.com/group/atlas210x-215x/files/ATLAS%20210%20Service%20bulletins%20and%20papers.pdf

To learn more about file sharing for your group, please visit

http://help.yahoo.com/help/us/groups/files

Regards,

tthulesius <tilman@...| 250|245|2002-02-27 06:19:15|RUDOLPH KING|Re: Atlas210x--> Nothing but Static on 215X|
Hello Karl:- thanks for the reply.... these radios were designed for signal injection diagnosis rather than voltage diagnosis.... it is quite possible to have a defective radio showing the correct voltage measurements yet still not functioning. It is therefore best to use the pre requisite test instruments to effect repairs.
You should first off ensure that the audio circuit is functioning by injecting an audio tone ( a few micro volts at about 1 Khz) into the early stages(CA3086 - PC300) of the audio amplifier (make certain that the volume control is fully clockwise when doing this) If functioning you should hear the audio tone in the speaker and should be able to control its amplitude by varying the volume control. The LM380N (audio amplifier) is rated at 2 watts output. Do not progress to any other parts of the circuit until the audio amp is functioning correctly. (Note- the CA3086 is also the AGC amplifier)
Once you are satisfied that the audio circuit is okay then check out the IF amplifier by injecting a signal at the IF frequency which signal should be also heard out of the speaker.
This advise pertains to both the first and second IF circuits.
It would seem from your earlier comments that the VFO circuit is functioning. Provided the circuits previously discussed are functioning then you should be able to input a signal at the SO239 socket on any of the amateur band frequencies (selected by band switch) and tune it on the VFO.
If the receiver's tuned circuit have not been mis aligned the sensitivity of the bands should be in the vicinity of 1/2 microvolt, with 30 micro volts producing a S9 signal on the meter.(Note:- RF control fully clockwise)
The transmitter's performance is dependent on the receiver circuits functioning since they share certain common circuits.... get the receiver working first then we will talk about the transmitter
I do not know the brand of Signal Generator you have, but for the front end sensitivity checks you should be able to set it at any of the ham frequencies- unmodulated (CW) and be able to detect it if the radio is working.
If you can tune and hear the signal when injected at the front end of the receiver but cannot get a S meter reading it is likely that the AGC/ALC circuits are not functioning also.... remember that these radios are in excess of 20 years old and most likely the components in the stated circuitry are aged and not functioning as they should in which case it is best to replace them... especially the capacitors.
Let me know how things work for you.
Regards
Rudy King


| 251|244|2002-02-27 08:20:25|fd0u1680|Re: Nothing but Static on 215X, VFO measurements|
Hi Uwe,
Here is what I found on my search for a VFO signal.
First I tried the spectrum analyzer:
pin4 PC100 nothing
pin7 PC200 weak but observable peak
pin9 PC200 weak but observable peak
pin8 PC300 weak but observable peak
pin10 PC300 nothing
pin4 PC300 nothing

Now, it is likely that my instrument is not resolving such a small
amplitude signal, especially since I don't have a proper RF
probe (was just using a direct coax hookup). However, it
was more sensitive than trying my homemade RF probe with
my voltmeter, or the scope.

So next, I tried using a Drake communications receiver. Now
when I did this, I could hear, and tune VFO signals from all
of the pins mentioned above. I could not quantitate the
measurements, because all of them were below the sensitivity
of my S-meter. Nonetheless, qualitatively:

pin4(PC100) ~ pin10(PC300) ~ pin4(PC300) = very weak.
pin9(PC200) a bit louder.
pin7(PC200) the loudest.

Anyhow, I am confident that the VFO is working, but the signal
is not being amplified enough (since I don't get anywhere near
the signal strength that 0.5 V would produce). I think we're in
the microvolt range. I did open the VFo tank, and found some
corrosion on the stators of tha main tuning capacitor. This
radio was in a boat owned by the previous owner and shows no
other observable corrosion.

-Karl

300D
card
problem
you
pins before
| 252|244|2002-02-27 11:41:43|Uwe Sievers|Re: Atlas210x--> Re: Nothing but Static on 215X, VFO measurements|
Hi Karl,
it still looks to me that your VFO signal is the problem.. even your hear the signal with
your receiver you need some hundred mV to bring the diode mixers to work.. so if you
still have only µV it will not work... within the VFO are 3 stages you should try find out
which one doesn,t work properly.. may be you have a ground problem there.. on one of
my units I had such a problem... Atlas made a poor job with the grounding of the pcb
and the coil and the surrounding parts.... I removed the pcb from the unit (all wires
stayed connected.. it,s a little bit tricky) and with a large solder iron resolder the ground connections on the board... mainly those ones which are around
the brackets to hold the pcb to the chassis.. after that everything worked fine in my unit.
But may be there is a problem within the 2 stages with Q402 and Q403... try to get to the
base of each of these 2 transistors and compare the DC voltages there with the manual
(page 34) and then with a RF-Probe do the same or if this isn,t sensitive enough solder
a short piece of wire to the base of Q402 bring this wire to a short distance to your
receiver, recognize the s-meter and then do the same with the next stage (Q403)..
there must be a much stronger signal then with the first test.... if not you have to find out
what is wrong on the VFO-PCB...
my guess is you have a grounding problem within the vfo-box......
I,m still sure your major problem is either very low or no voltage from the VFO... and
you need, as I said it already several hundered mV for conducting the diode ring in the
mixer...
73 de Uwe
| 253|244|2002-03-06 10:07:00|fd0u1680|Nothing but Static on 215X, VFO surgery, and the solution.|
Well,
I did as Uwe suggested, and I removed PC400 from the unit, completely.
It takes fingers like a British car mechanic, but I have experience in
that department. I decided to just replace all the transistors, and
caps, and resolder the brackets to assure a good ground. I reinstalled
the VFO, and to my great surprise it didn't work!! How could such a
simple circuit not work? Well, I traced the VFO output to the
"External Oscillator" noval plug on the back of the unit. I measured
the output of the VFO there. Problem was, that it didn't go back into
the radio. Then I looked at the part of the manual that concerns
itself with adding an external oscillator (which I don't have). There,
it mentions jumpers on the noval socket. Jumpers? I looked back there
and all the writing was rubbed off, so you couldn't really see clearly
where such jumpers should be. Anyhow, I made a pair of jumpers, and
then things started working. I did notice, in monitoring my signal on
an external receiver, that there seems to be some tone associated with
a voice transmission, and simply putting the unit into CW mode I get
some carrier, so maybe the end of the story isn't written yet. Anyhow,
thanks for all your suggestions because without them I would still
have a dirty and broken radio.
| 254|244|2002-03-06 11:01:04|Uwe Sievers|Re: Atlas210x--> Nothing but Static on 215X, VFO surgery, and the s|
That,s great,
sorry I have forgotten to write something about the jumpers on the noval socket ..
normally there a 2 jumpers in the socket, difficult to see because they are made of bare
thin wire... but now you have the VFO signal and you should go forward to check all
stages of the unit for proper workein...
good luck
Uwe DJ9XG




To: atlas210x-215x@yahoogroups.com
From: "fd0u1680" <fd0u1680@... Date sent: Tue, 05 Mar 2002 20:23:56 -0000
Subject: Atlas210x-- solution.
Send reply to: atlas210x-215x@yahoogroups.com

| 255|244|2002-03-07 02:08:47|rickskione@aol.com|Re: Atlas210x--> Nothing but Static on 215X, VFO surgery, and the s|
When I operate my 210x and transmit in the CW mode, is there anything I can
do to hear a tone? All I hear is the buzz of a transformer.
Thanks,
Rick/K3EYJ
Los Angeles, Ca.
| 256|256|2002-03-08 01:17:34|Rick McKee|CW sidetone circuit|
Almost forgot, the file will be called: SIDETONE.jpg

KC8AON


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| 257|257|2002-03-08 02:28:54|Rick McKee|CW Sidetone for Atlas 210X|
I have drawn up a schematic of a simple sidetone circuit using an NE555
IC that can be added to the Atlas 210X / 215X and will upload it to the
site later this evening.

73,
Rick McKee, KC8AON
Willow Wood, Ohio


________________________________________________________________
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| 258|256|2002-03-08 04:06:10|Jim Glover|Re: Atlas210x--> CW sidetone circuit|
Could you email that puppy to me?

Thanks!

73,
Jim WB5UDE
| 259|256|2002-03-08 14:47:28|Rick McKee|Re: Atlas210x--> CW sidetone circuit|
You can download it yourself from the file section of the Atlas site, I
have allready uploaded it there. If you have trouble with that send me
your email address and I will send it to you.


Rick McKee,KC8AON
Willow Wood,Ohio

On Thu, 7 Mar 2002 19:41:13 -0600 (CST) Jim Glover <psykey@... writes:
________________________________________________________________
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| 260|256|2002-03-08 20:21:52|rickskione@aol.com|Re: Atlas210x--> CW sidetone circuit|
Hi Rick,
Sorry, couldn't find the sidetone circuit schematic.
Could you send it to me also?
Thanks,
Rick McCleaf/K3EYJ
Voice of America, Los Angeles, Ca.


[Non-text portions of this message have been removed]
| 261|256|2002-03-09 03:15:27|Rick McKee|Re: Atlas210x--> CW sidetone circuit|
Just checked, and the file is at the Atlas/Yahoo site. Go to the site,
click on "FILES" on the left side of the screen, when the files section
loads, look for the file "SIDETONE.jpg" then click on it and then save
it, it really is that easy !

On Fri, 8 Mar 2002 13:21:31 EST rickskione@... writes:
________________________________________________________________
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| 262|262|2002-03-09 03:15:46|Rick McKee|CW Sidetone circuit for Atlas 210X|
Here it is for all you chaps that cant find it on the site ! The numbers
next to the NE555 of course are the pin numbers of the IC. You can use
panel mount pots on the back panel of the Atlas if you can find some that
are small enough or just use the pc mount type on the circuit board and
set and forget them. The circuit is very small and can be tucked away in
the corner of the Atlas. I know this is crude, but if you study it, it
really is very simple.

Good Luck & 73

Rick McKee,KC8AON
Willow Wood,Ohio

10K ohm pot
- volume

------/\/\/\/\/\/\------------------------- |
bridge pin 18 pc 300 or
|
pin 4 of aux socket
|
|
|
4.7K ohm
|
___/\/\/\/\/\/\_______
| 8 |
4 |
=============
|
|
| |
Audio out to <------| |----------| |
|
phone jack 1uF + 3 | NE555
|-----------------------|
pin 15 pc300 | | 7
|
|
| Z
|
| Z 100K pot - tone
|
| Z
|
| Z
|
|-----------------------|
|____________| 2, 6
|
| 1
_|_
|
----- .1uF
_|_
_|_
/ / /
/ / /
Ground
Ground









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| 263|262|2002-03-10 20:52:29|Rick McKee|CW Sidetone circuit for Atlas 210X|
OK, my little diagram using text didn't quite work out so well so for the
folks that can't seem to find the schematic at the site I will give a
complete description of it here. And yes, if you follow the description
you can build it without a schematic - it is a VERY SIMPLE circuit !
Someone please confirm that the schematic is on the site for me, I can
find it but somefolks can't for some reason - ? The name is
"SIDETONE.jpg" - and thanks !

First you need a few parts listed below - all can be found at Radio
Shack.

Quantity Part
1 ----------------- NE555 timer IC

1 ----------------- 8 pin IC socket (not really needed, I just like to
use them)

1 ----------------- 1uF 16V electrolytic capacitor

1 ----------------- .1 uF ceramic disc capacitor

1 ----------------- 10K ohm potentiometer - a small panel mount or a
miniature pc mount.

1 ----------------- 100K ohm pot ditto ditto
ditto

1 ----------------- 4.7K ohm 1/4 watt resistor

1 ----------------- small general purpose circuit board


Now that you have all the parts gathered together, start by putting a
jumper on the IC socket (do this on the bottom side before you mount the
socket on the board - if not using the socket, put the jumper on the
bottom of the IC itself) between pins 2 and 6. The reason I like to use
the socket is that you are not applying heat directly to the IC, and you
can replace the IC very easily later if need be ! Now with pins 2 and 6
jumpered together, attach the positive side of the 1uF electrolytic
capacitor to pin 3 of the socket, and the negative side of the capacitor
goes to the headphone jack on the Atlas - (pin 15 on PC300). Next,
ground pin 1 of the socket. Now, put the 4.7K ohm resistor between pins
4 and 7 of the socket. Next, put the 100K ohm potentiometer between pins
7 and 2. Now, connect on side of the .1uF disc cap to pin 2, and the
other side of the cap to ground. Next, connect one side of the 10K pot
to pin 8, and connect the other side of the pot to a DC voltage source at
the swr bridge of the Atlas (pin 18 on PC300 or pin 4 of the auxiliary
socket). Finally, install the NE555 timer IC in the socket in the proper
position (index on IC aligned with the index on the socket), mount the
circuit in any conveinient spot in the Atlas, adjust the volume and tone
controls to your liking while keying while in the CW mode, and you are
done !

NE555 Pinout (if this works)

8 7 6 5
Index- 1 2 3 4

This really is an easy circuit to build without the help of a schematic
if you have any experience at all in building. If you don't, then get
someone who does to help you.

Good Luck !
Rick McKee,KC8AON
Willow Wood,Ohio


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| 264|264|2002-03-18 16:00:11|toledohamradio|215X Differences?|
What's the main differences (besides the green display) between an
Atlas 215X and an Atlas 215XL?
73's
| 265|265|2002-03-19 01:27:09|Rick McKee|Re: Atlas210x--> 215X Differences?|
the 210x has 10 thru 80 meters and the 215x has 15 thru 160 meters


Rick McKee,KC8AON
Willow Wood,Ohio

On Mon, 18 Mar 2002 13:59:49 -0000 "toledohamradio"
<toledohamradio@... ________________________________________________________________
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| 266|264|2002-03-19 08:43:40|toledohamradio|Re: 215X Differences? Correction|
I'm sorry, I meant to say, 'what is the difference between
the Atlas 215 (without the 'x') and the Atlas 215X?'
| 267|267|2002-03-19 16:37:48|JDAM|Re: Atlas210x--> Digest Number 83|
I just got a 180 with the AC console. Its really a fun little rig.
I don't know how it fits in with the 210X etc. Was it the first one
of the series. It works great.


WA6VML

John

| 268|268|2002-03-19 17:36:38|RUDOLPH KING|Re: Atlas210x--> Re: 215X Differences? Correction|
The Atlas 210/215 was the earlier run models of these transceivers. The Atlas 210X/215X being the later run models with certain changes and additions to the circuit design that increased its overall performance
Regards
Rudy King

| 269|269|2002-03-21 21:07:06|Johnny Electron|Make a 215 into a 210X ?|
Greetings all,
Your suggestions appreciated:

Could you take the parts from a working 215 and a broken 210X and
make one working 210X unit?

The VFO and filters appear to work fine on the 210X, but that's it,
so could the VFO + inductor-filters + dial from the 210X be added to
the 215 to give the full 500KHz band coverages, plus adding 10M and
deleting 160M ?
Or is it not worth wrecking the one radio that does work, and having
two bad units instead of one?
Ideas?
73's
Johnny











__________________________________________________
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| 270|269|2002-03-21 22:11:11|Uwe Sievers|Re: Atlas210x--> Make a 215 into a 210X ?|
Hi Johnny,
your assumption is ok... the most different parts in both units are the VFO and the
coils for the Receiver, Transmitter and the Low Pass Filter in the PA... as I understand
you have all parts from the 210X .. so my assumption is:
Move all 3 Boards from the running 215 into the broken 210X
PC 100, PC 200 and PC 300...
in both units they are compatible, even you may have different Versions
I know Versions A-D......
the only other difference can be you have a different IF...
the older units have 5520 khz the newer units have 5645 Khz
if you have different IF,s in your unit f.e in the 215 the 5520 khz, then you must also
move the crystal filter and the carrier oscillator board (PC600) into the 210X... if both
have the same IF it,s not necessary... the reason for this PC100 and PC200 boards
have IF-dependant coils on their boards.
If you have done this, the unit should work at minimum the reception... if the transmitter
isn,t working you have to move the whole PA-Asm. to the 210X as well (you have only
very few cables to desolder and solder... so make a little drawing before you do it).
After this you should have a full functioning 210X (of course if the parts from the 215 are
ok.
Please ask again or more if you want to.
73 and good luck
Uwe DJ9XG (I own 7 Atlas units in total, 215X and 210X)


To: Yahoo Group Atlas 210X <atlas210x-215x@yahoogroups.com From: Johnny Electron <toledohamradio@... Date sent: Thu, 21 Mar 2002 11:07:04 -0800 (PST)
Subject: Atlas210x-- Send reply to: atlas210x-215x@yahoogroups.com

| 271|269|2002-03-22 04:59:48|RUDOLPH KING|Re: Atlas210x--> Make a 215 into a 210X ?|
Hello Johnny:- Using the Atlas 215 components to resuscitate the 210X would only be possible if the IF frequency in both radios are the same. The earlier models of 210/215(note : no "X" suffix) radios used an IF frequency of 5520KHz and the later models denoted by the "X: suffix from a certain serial number used 5645KHz IF frequency.
I am assuming that when you said yours was a 215 that it is indeed that (no "X" suffix) and the 210X likewise is as stated.
In addition the radios without the "X" suffix did not have the additional traps and circuit improvements as did those with the "X" suffix. Before we proceed further kindly advise if your radios are as indeed as you state one with and the other without the "X" suffix.
However all is not lost as I may be in a position to help with the conversion
Best Regards
Rudy King.

| 272|269|2002-03-22 09:59:19|Uwe Sievers|Re: Atlas210x--> Make a 215 into a 210X ?|
Hello Rudy,
your info isn,t right... there is no relation between the IF and the suffix X...
I have 7 units here all are "X" units (210X and 215X) and they have both IF,s
and also in the manual is correctly stated that Atlas has changed the "X" version during
their production run. The only outside indication is an label on the backside of the unit
which indicates the new IF 5645khz... the older ones have of course no label..
but as I stated already in my message yesterday if Johnny has different IF,s
in his 2 units he has to move the crystal filter and the carrier oscillator board
(PC600) as well to the 210X unit.... in the the other case (both IF,s are the same)
he can use the components from the 210X.
So Johnny don,t become confused with the may be 2 IF,s.
73 de Uwe

To: <atlas210x-215x@yahoogroups.com From: "RUDOLPH KING" <rudyking@... Date sent: Thu, 21 Mar 2002 22:02:35 -0800
Subject: Re: Atlas210x-- Send reply to: atlas210x-215x@yahoogroups.com

serial number used 5645KHz IF frequency.
| 273|269|2002-03-22 10:01:51|Uwe Sievers|Re: Atlas210x--> Make a 215 into a 210X ?|
Johnny that depends what you want to have... the work to replace some parts isn,t too
difficult... may be you have only to change the 3 boards... that,s all...
73 de Uwe

To: <atlas210x-215x@yahoogroups.com From: "RUDOLPH KING" <rudyking@... Date sent: Thu, 21 Mar 2002 22:02:35 -0800
Subject: Re: Atlas210x-- Send reply to: atlas210x-215x@yahoogroups.com

serial number used 5645KHz IF frequency.
| 274|269|2002-03-22 17:21:19|RUDOLPH KING|Re: Atlas210x--> Make a 215 into a 210X ?|
Hello Uwe:- I maintain what I have said is accurate, if you took the time to read what was said you would observe that I said the units with suffix "X" from a certain serial number.
Best Regards
Rudy King

| 275|269|2002-03-22 17:34:53|Uwe Sievers|Re: Atlas210x--> Make a 215 into a 210X ?|
Okay Rudy,
I didn,t recognize this... in this way it,s right...
sorry for my misunderstanding
73 de Uwe


To: <atlas210x-215x@yahoogroups.com From: "RUDOLPH KING" <rudyking@... Date sent: Fri, 22 Mar 2002 10:24:05 -0800
Subject: Re: Atlas210x-- Send reply to: atlas210x-215x@yahoogroups.com

certain
| 276|276|2002-03-26 15:49:38|toledohamradio|210 Boards for sale?|
Does anybody have any 'surplus' plug-in boards for their 210 that
they would be willing to sell? (200B, 300C...) How much each?
73's
John
| 277|277|2002-03-27 11:02:48|toledohamradio|Another Atlas for the Garbage Can!|
I am going to give-up on these Atlas radios. I spent a month working
on a 210X - still DOA, so...
I scraped-together enough to get a 215 at a hamfest 2 weeks ago - and
tonight, it too went silent. AF Gain seems to work, but can't hear
even the international broadcasters on 40 Meters anymore! Nothing
but a click on transmit. Reception is gone.
What's with these Atlas radios, or is it just me?
Reception on the 215 WAS fine, and now, 9 days of use and POOF!
As Charlie Brown would say:" Uggggggggh"
| 278|277|2002-03-27 12:00:33|Uwe Sievers|Re: Atlas210x--> Another Atlas for the Garbage Can!|
That,s really curious... I never had a problem with these radios to fix them if they fail..
I have 7 of them and now them quite well... may be you have a power problem...
too high voltage for the low amp circuits.... the maximum is 16 volts because most of the
electrolytic capacitors have a maximum voltage of 16 volts... so if your supply has a
higher voltage all of them can become defective... the high amp voltage can be higher,
the capacitors in the pa-amp have higher voltages and the pa is the only part which is
separately fed with the hi amp voltage (the jack just below the plug for the ground lead)
So check your voltage to be shure it,s within the specs...
I wish you good luck.. and let me know your findings
73 de Uwe DJ9XG


To: atlas210x-215x@yahoogroups.com
From: "toledohamradio" <toledohamradio@... Date sent: Wed, 27 Mar 2002 05:35:47 -0000
Subject: Atlas210x-- Send reply to: atlas210x-215x@yahoogroups.com

| 279|279|2002-03-28 20:50:53|Johnny Electron|Voltage Regulator Voltages?|
Why do some radios have 8.5 VDC for the regulated voltage, and some
have 10 VDC for the regulated voltage?
Is one better than the other?
If you look on the chassis schematics, you will see that the older
ones show the 10 Volt regulator (1974) and the newer (1977) shows the
8 and a half volt regulated voltage?

__________________________________________________
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| 280|279|2002-03-29 15:56:42|uwsievers|Re: Voltage Regulator Voltages?|
--- In atlas210x-215x@y..., Johnny Electron Hi Johnny,
I think it,s only a design reason... in the later units they always
use the lower voltage... this can reduce warming of the components in
the VFO compartment to lower thermal drift..
but there is no answer which is better.
I will be in the US the coming month. Where is your qth?
Have you find new reasons for your different problems with your
3 Atlas?
73 de Uwe

the
| 281|281|2002-04-01 14:25:56|kc8aon|Atlas 350XL|
Just swapped my 210X for a 350XL and was wondering if anyone had a
spare manual or one they could upload to this site ? And why isn't
the 350 included in this site, seems to be a top notch rig !

KC8AON
| 282|282|2002-04-01 18:05:57|Gerhard.F.Wagner@t-online.de|Re: Atlas210x--> Atlas 350XL|
Dr OM ,
I also own an ATLAS350XL - For the manual, I have scanned my version because of some requests. So, pls
have a look under my pages:
http://home.t-online.de/home/gerhard.f.wagner/files/
http://home.t-online.de/home/gerhard.f.wagner/amateurf.htm
There is also another OM busy in this group with his ATLAS 350XL, it is
DJ9XG, Uwe. He has fixed his unit and thereby gained a lot of experience
with it!
73 de Gerhard, DF1DA
| 283|282|2002-04-02 00:56:41|Rick McKee|Re: Atlas210x--> Atlas 350XL|
Thanks Gerhard, I will take a look at your site.

73, Rick, KC8AON


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| 284|282|2002-04-02 01:05:05|Dave|Re: Atlas210x--> Atlas 350XL|
Lucky guy :-)

I have been looking for a 350XL for a while and they seem difficult to find
in the UK.

Cheers,

Dave G3VFP

| 285|285|2002-04-02 08:20:46|Johnny Electron|100 & 200 work - What to do next?|
I now have a working 100 board, and 200 board, BUT the 300 board
heats up the audio amp chip hot enough to fry eggs. I've replaced
both chips on the 300 board, and same hot result. Suggestions?

Also, if I hook-up and external audio amp to the AF input of the 300
board, I can only hear 500Megawatt international broadcasters at
best. Any ideas what stage of the radio to try next?

Thanks to all for your suggestions.

__________________________________________________
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| 286|285|2002-04-03 14:49:01|uwsievers|Re: 100 & 200 work - What to do next?|
Hi Johnny
for your question about my qth.. I,m actually in Florida in Indian
Harbour Beach...
now your problem with the 300 board... on the board is also the FET
Switch for both oscillators (VFO and Carrier oscillator).. if thrsr
do not function correctly the corresponding diode mixers on the 2
other boards will not work.. may be one or more of the 4 Fet,s has a
problem... to islolate it more you should do all the voltage
measurements for this board described in the manual.. the excessive
heat on the audio chip is the result of either a shorted component
(electrolytic capacitor) or false Voltage... so try to make your
voltage measurements first... there should be deviations to the manual
Uwe from sunny Florida

--- In atlas210x-215x@y..., Johnny Electron
| 287|282|2002-04-03 14:59:54|uwsievers|Re: Atlas210x--> Atlas 350XL|
Hi Rick,
I agree with you to use this group also for the 350XL and also the 180
as Gerhard has written already I own an Atlas350 as well and had
several problems when I bought it 3 month ago.. meanwhile I,ve fixed
it...
comparing the receiver with the Atlas 210X is has a poor performance..
the rf-amp is a joke in the 350... because it,s difficult to get to it
I haven,t tried up to now to replace it and/or make it switchable..
the Atlas make a lot rf power up to 200 watts if you have the right
power-supply (appr. 30 amps on 13V..)
So I would like to participate on the experiences from other 350
owners...
Uwe DJ9XG

| 288|282|2002-04-03 17:17:55|Tilman D. Thulesius|Re: Atlas210x--> Atlas 350XL|
I think that I have seen that www.rf-parts.com do have a manual for the
350XL.

Congrats for the rig b.t.w / Tilman

kc8aon wrote:

| 289|282|2002-04-03 17:31:15|sasi nayar|Re: Atlas210x--> Atlas 350XL|
13V..)

Uwe,
How much power can one get out of the 210X if you
power it up with a similar power source? Just curious.
73'
Sasi
9V1SM / VU3SNM



=====
Amateur Radio For Global Peace and Fraternity
----------------------------------------------
Sasi Nayar, 9V1SM / VU3SNM,
Reef Ecology Lab, Department of Biological Sciences
National University of Singapore,10 Kent Ridge Crescent
Singapore 110 260. Tel : (65) 778 7112; Fax : (65) 774 9654;
URL:http://www.dbs.nus.edu.sg/lab/reef/SasiNayar.htm

__________________________________________________
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| 290|282|2002-04-04 08:17:27|Uwe Sievers|Re: Atlas210x--> Atlas 350XL|
sasi,
the 350 has a complete different amplifier... in the 350 there 2
amplifiers in parallel each of them would deliver 100 watts output..
they are fed via splitter and put together via an combiner... splitter
and combiner are a special form of baluns
so the more power comes from the 2 amplifiers in the 350..
73 Uwe

| 291|282|2002-04-04 12:18:18|sasi nayar|Re: Atlas210x--> Atlas 350XL|
Thanks Uwe. I get the picture now. I remember checking
the power out from my friend's 210X and measured about
120 W at 13.5V and about 30 Amps. This radio has not
been modified at all. That left me wondering whether
all 210X put out more than 100W (ofcourse 20+ watts
wouldnt make much of a difference).
73'
Sasi
9V1SM / VU3SNM



=====
Amateur Radio For Global Peace and Fraternity
----------------------------------------------
Sasi Nayar, 9V1SM / VU3SNM,
Reef Ecology Lab, Department of Biological Sciences
National University of Singapore,10 Kent Ridge Crescent
Singapore 110 260. Tel : (65) 778 7112; Fax : (65) 774 9654;
URL:http://www.dbs.nus.edu.sg/lab/reef/SasiNayar.htm

__________________________________________________
Do You Yahoo!?
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| 292|292|2002-04-08 19:19:28|rickskione@aol.com|POWER!!!|
Hi All,
Trying to get a 210x running for a friend, and am wondering if I am putting
out all the power available. I know that the specs says it has 200 Watts
Input power, but when I load it into a Cushcraft Verticle I only get 20 Watts
Average power out (measured with a Yaesu power/swr meter on 15 meters. How
is the 200 Watts Input power measured, average, PEP, RMS ?
Thanks,
Rick, K3EYJ


[Non-text portions of this message have been removed]
| 293|293|2002-04-09 03:57:20|Paul Arnold|Re: Atlas210x--> POWER!!!|
I believe the "input" power is derived from P=IxE where P=200W and
E=13.8V, which leaves a current consumption of about 14.5 Amps. You
must have a hefty power supply or vehicle battery to get the most out of
the Atlas. The actual "output" power is what you would measure with
your watt meter and a 50 ohm dummy load. My 210X has registered a
little over 100 W peaks into a resistive dummy load using my old
Heathkit HM-200 watt meter while whistling into the microphone. Not too
scientific, but remember that the match between the Atlas and any
antenna is VERY critical and will determine the power delivered to the
load.

Paul - KØSEP
| 294|293|2002-04-09 08:01:15|rickskione@aol.com|Re: Atlas210x--> POWER!!!|
Hi Paul, Tnx much for your reply. You're absolutely right the impeadance
match between any transmitter final stage and the antenna is very critical.
I guess I really need to dig back into my old books to nail it down.
I'm not so sure that the simple P=IE is accurate to come up with the 200
Watts.
Just think about it...14.5 amps is nearly enough to trip any 15 amp breaker.
I don't think that power supply can handle that kind of current. However if
the specified 200 Watts is a PEP (peak envelope power) rating the current
would be much less. Picture your power sign wave...halve it and multiply by
.707 and you would have RMS, root means squared power, which would calculate
out to hummm about 70 watts RMS...and that will give you a current of let's
see 70 devided by 13.8 volts equals about 5 amps...certainly sounds more like
it.
Sorry, if I'm off base with this, I'm just winging it from old memories.
Please correct me if I'm wrong.
But again you are dead on with the antenna match being critical. The greater
the mismatch the higher the transmission line impeadance, the greater the
losses, the lower the efffeciency, the lower the power deliveried to the
antenna.
If I only had a dummy load, I could simplify the whole system and figure out
if this antique is up to snuff.
Again thanks for your reply, and forgive me if I bored you with too many
details.

Rick, K3EYJ
PS ugh...Let's not forget "average power", I think that's .638 of peak or
something like that.
| 295|293|2002-04-09 08:16:22|rickskione@aol.com|Re: Atlas210x--> POWER!!!|
Hey Paul, What frequency were you on when you got the 100 W peak into the
dummy load? And what kind of readings do you get when connected to an
antenna?
And what do you get when you close a cw key?
thanks again,
Rick
| 296|244|2002-04-19 08:26:43|kr0y@arrl.net|Re: Atlas 180/210/215 etc. --> Unstable VFO|
I have an Atlas 180 that has a somewhat 'unstable' VFO, when the bandswitch
is moved slightly. Just 'rocking' it a tiny bit, but not actually switching
it, will cause the VFO frequency to shift, as much as several hundred cycles
(or more, in some cases). Is this a common problem with these rigs, or do I
need to try to replace the band switch?

John - KR0Y
| 297|297|2002-04-20 02:10:09|RUDOLPH KING|Re: Atlas210x--> RE: Atlas 180/210/215 etc. --> Unstable VFO|
John:- there probably is nothing wrong with your band-switch, this is a somewhat inherent problem with the Atlas line rigs.
Within the VFO box there is a lot of stray capacitance existing between the leads, walls of the box and other components. Any action that causes the VFO box to slightly distort would produce this result that you described. Instability in the VFO has been one of the problems with the Atlas rigs, you may try adjusting the lead runs within the VFO box itself to eradicate the problem.
Regards
Rudy King

| 298|297|2002-04-20 03:04:01|kr0y@arrl.net|Re: Atlas210x--> RE: Atlas 180/210/215 etc. --> Unstable VFO|
Thanks Rudy. I appreciate the information. I'd noticed that the
210/210x/215/215x are all built very similarly to the 180, in the VFO
compartment, so I suspected that this might be a 'common' problem with all
of these rigs. There is some 'play' in the bandswitch on my 180, which
allows for the coils that are connected to it to move slightly when
'rocking' the bandswitch slightly. I've tried to 'stabalize' the movement
of the bandswitch, but I think it's just 'worn out' to some extent. I have
gotten the rig mounted in my car now, and it does seem to be stable enough,
if I don't mess with the bandswitch (which normally, I don't do when I'm
using the rig). So, it looks like it will be 'ok'.

I did think of a way that might work to better stabalize this though. If I
used several very small relays (6 relays, to be specific) mounted to a piece
of pc board or perf board and mounted in the VFO compartment to switch the
coils and coil taps, and used the 'A' section of the bandswitch to switch
the relays, instead of the bandswitch switching the coils and coil taps
directly, then the 'frequency sensitive' parts of the VFO would not be
directly connected to any part that could physically move (i.e. the
bandswitch).

Maybe when I get some extra time (hi hi), I might try my idea.

73...
John - KR0Y

-----Original Message-----
From: RUDOLPH KING [mailto:rudyking@...]
Sent: Friday, April 19, 2002 4:57 PM
To: atlas210x-215x@yahoogroups.com
Subject: Re: Atlas210x--

John:- there probably is nothing wrong with your band-switch, this is a
somewhat inherent problem with the Atlas line rigs.
Within the VFO box there is a lot of stray capacitance existing between the
leads, walls of the box and other components. Any action that causes the VFO
box to slightly distort would produce this result that you described.
Instability in the VFO has been one of the problems with the Atlas rigs, you
may try adjusting the lead runs within the VFO box itself to eradicate the
problem.
Regards
Rudy King
| 299|297|2002-04-20 05:17:02|Paul Arnold|Re: Atlas210x--> RE: Atlas 180/210/215 etc. --> Unstable VFO|
Hi John;

I'm no expert here, but I've found that my band switch is mechanically
binding - difficult to operate. I experienced the same frequency
shifting too. I used some WD-40 on the switch bearing surfaces and
exercised the switch many times and found quite an improvement. I think
the binding and difficult operation puts mechanical stress on the
components and causes this frequency shift.

Just my opinion, but my radio is better now after the WD-40 treatment.

Paul KØSEP
| 300|297|2002-04-20 05:45:48|kr0y@arrl.net|Re: Atlas210x--> RE: Atlas 180/210/215 etc. --> Unstable VFO|
The bandswitch on my 180 was also VERY 'tight'. In fact, it was so tight,
it hurt my fingers to turn the switch (the grooves in the knob nearly felt
like they were going to 'cut' my fingers or at least cause big blisters on
my fingers). I bent the spring metal pieces that put pressure against the
little 'ball bearings' in the switch, and this helped tremendously, in terms
of the amount of 'force' necesary to turn the switch. I also lubricated the
switch with a tuner cleaner/lubrication. However, the switch still 'rocks'
slightly, which appears to be causing causing the frequency shift. But,
using the rig is still much better than before.

Eventually, I'll figure out a good way to completely 're-build' the VFO,
eliminating all of these problems. :-)

John - KR0Y

-----Original Message-----
From: Paul Arnold [mailto:parnold@...]
Sent: Friday, April 19, 2002 10:17 PM
To: atlas210x-215x@yahoogroups.com
Subject: Re: Atlas210x--

Hi John;

I'm no expert here, but I've found that my band switch is mechanically
binding - difficult to operate. I experienced the same frequency
shifting too. I used some WD-40 on the switch bearing surfaces and
exercised the switch many times and found quite an improvement. I think
the binding and difficult operation puts mechanical stress on the
components and causes this frequency shift.

Just my opinion, but my radio is better now after the WD-40 treatment.

Paul KØSEP
| 301|297|2002-04-20 05:47:02|Terry Nixon|Re: Atlas210x--> RE: Atlas 180/210/215 etc. --> Unstable VFO|
Only the bearing and detents should probably be lubricated VERY sparingly with some lithium grease after you clean them and remove all the dried-up and hardened old grease and dirt the grease has attracted.. at least in my opinion.



[Non-text portions of this message have been removed]
| 302|244|2002-04-20 15:16:29|Rick McKee|Re: Atlas 180/210/215 etc. --> Unstable VFO|
CAUTION - DO NOT USE WD-40 ON THE CONTACTS OF THE SWITCH, AS IT CONTAINS
A SMALL AMOUNT OF VARNISH TO ACT AS A CORROSION INHIBITOR AND YOU SURE
DONT WANT VARNISH ON THE CONTACTS - "IT'S NON CONDUCTIVE !"

KC8AON

On Fri, 19 Apr 2002 22:16:36 -0500 Paul Arnold <parnold@... writes:
________________________________________________________________
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| 303|303|2002-04-20 15:35:50|Dave|Re: Atlas210x--> Re: Atlas 180/210/215 etc. --> Unstable VFO|
? :-)
| 304|297|2002-04-21 00:14:40|rickskione@aol.com|Re: Atlas210x--> RE: Atlas 180/210/215 etc. --> Unstable VFO|
I think you are on the right track with your WD-40 treatment Paul. Contact
switches have a tendency to become corroded over time and the mechanical
stress (metal fatigue) loosens the tension of the contacts. Years ago, when
I repaired TVs with the old mechanical rotary tuners I would spray them
heavyly with Contact tuner spray and briskly rotate the switch to clean the
corrosion from the switch. Works most of the time, unless the switch is
severely corroded or weakened.
Good luck,
Rick, K3EYJ
| 305|297|2002-04-21 01:21:01|Terry Nixon|Re: Atlas210x--> RE: Atlas 180/210/215 etc. --> Unstable VFO|
Isopropyl alcohol or trichlorethane work much better for cleaning contacts, and do not leave behind a oil or grease residue.

Years ago while working on some Drake equipment, the Drake factory techs told me to absolutely not use anything with any oil or silicone in their switches, but to use only isopropyl alcohol and a pencil eraser. A[pparently RF and silicone/oil do not get along well together.

Terry-WB0VQP


[Non-text portions of this message have been removed]
| 306|297|2002-04-21 01:21:36|RUDOLPH KING|Re: Atlas210x--> RE: Atlas 180/210/215 etc. --> Unstable VFO|
Hello John:- In your first post you had omitted to indicate the switch binding problem.If the band switch requires that amount of torque to turn it there are two things that can cause this problem, The first is naturally rust, but for it to be that hard to turn, the rust would be visible.
The second is one generally overlooked my most owners but from my years of servicing these radios easily identified, and that is the shaft that passes through the switch wafers. This shaft is made of a fibrous material and over the years of use tend to develop a bend in its axial symetery. When this happens it requires more pressure than normal to turn the switch.
The only way to observe this axial distortion of the switch shaft is that you will have to remove the shaft from the switch and either eyeball it or try placing it on a flat surface when the distortion would plainly be seen.
If it is distorted as suspected, the only answer is replacement of the shaft or worse case the entire switch, however be warned it is not an easy job and should only be undertaken by someone sufficiently knowledgeable in this process.
Best Regards
Rudy King

| 307|297|2002-04-21 01:32:29|RUDOLPH KING|Re: Atlas210x--> RE: Atlas 180/210/215 etc. --> Unstable VFO|
In the earlier days these two chemicals as mentioned were thought to be good for cleaning switches however it has since been found that the Isopropyl alcohol attracts moisture resulting in rusting also the trichlorethane has proven dangerous to the health of some people when inhaled.
There are a numner of patented "switch cleaners" solvents available on the market which does the job without leaving any residue, a visit to your friendly "Radio Shack" or neighbourhood radio store should prove rewarding.
Rudolph King

| 308|297|2002-04-21 08:26:44|sasi nayar|Re: Atlas210x--> RE: Atlas 180/210/215 etc. --> Unstable VFO|
Absolutely right Terry. Isopropyl alcohol is the best.
I was told to use this even to clean antenna contacts.
Works perfect and no worries on leaving behind greasy
residues.
73
Sasi
9V1SM/ VU3SNM

--- Terry Nixon <TLNixon@... =====
Amateur Radio For Global Peace and Fraternity
----------------------------------------------
Sasi Nayar, 9V1SM / VU3SNM,
Reef Ecology Lab, Department of Biological Sciences
National University of Singapore,10 Kent Ridge Crescent
Singapore 110 260. Tel : (65) 778 7112; Fax : (65) 774 9654;
URL:http://www.dbs.nus.edu.sg/lab/reef/SasiNayar.htm

__________________________________________________
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| 309|297|2002-04-22 01:18:29|kr0y@arrl.net|Re: Atlas210x--> RE: Atlas 180/210/215 etc. --> Unstable VFO|
While the switch was very 'tight' to turn, I did not think about it
'binding'. But, I see what you mean when you explain this as a possible
problem. Right now, it seems to be ok. The only thing I don't like is the
frequency shift when 'rocking' the switch, but since that seems to be a
'common' problem, I'll live with it for now and try to get some time later
to see if I can 'rework' the VFO to 'fix' this problem. :-) Thanks.

73...
John

-----Original Message-----
From: RUDOLPH KING [mailto:rudyking@...]
Sent: Saturday, April 20, 2002 9:24 PM
To: atlas210x-215x@yahoogroups.com
Subject: Re: Atlas210x--

Hello John:- In your first post you had omitted to indicate the switch
binding problem.If the band switch requires that amount of torque to turn it
there are two things that can cause this problem, The first is naturally
rust, but for it to be that hard to turn, the rust would be visible.
The second is one generally overlooked my most owners but from my years of
servicing these radios easily identified, and that is the shaft that passes
through the switch wafers. This shaft is made of a fibrous material and over
the years of use tend to develop a bend in its axial symetery. When this
happens it requires more pressure than normal to turn the switch.
The only way to observe this axial distortion of the switch shaft is that
you will have to remove the shaft from the switch and either eyeball it or
try placing it on a flat surface when the distortion would plainly be seen.
If it is distorted as suspected, the only answer is replacement of the shaft
or worse case the entire switch, however be warned it is not an easy job and
should only be undertaken by someone sufficiently knowledgeable in this
process.
Best Regards
Rudy King
| 310|310|2002-04-22 22:58:07|Kevin Murphy|Re: Atlas210x switch contacts|
Hi,
I use Caig Deoxit on the switch contacts.
Kevin
ZL1UJG

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| 311|310|2002-04-25 15:36:23|John Rayfield, Jr. - KR0Y|Re: Atlas210x--> Re: Atlas 180 PC100 & PC200 PC Boards|
I have an Atlas 180. It appears that the PC200 circuit board (2nd mixer)
also has the circuitry that was found on the PC100 board (according to all
of the schematics that I've been able to find. So, this radio doesn't seem
to have a PC100 circuit board. I haven't been able to find any schematic of
a PC200 board that has the circuitry on it that is on my PC200 board.

Can anyone shed any light on this?

John - KR0Y
| 312|310|2002-04-25 19:26:05|John Rayfield, Jr. - KR0Y|Re: Atlas210x--> Re: Atlas 180 PC100, PC200, & PC120 PC Boards|
I found out that the PC board that's in my Atlas 180 is a PC120, not a PC100
or PC200.

Has anyone seen one of these boards? I can't find any reference to it
anywhere.

John - KR0Y
| 313|310|2002-04-25 21:31:08|John Rayfield, Jr. - KR0Y|Re: Atlas210x--> Re: Atlas 180 PC100, PC200, & PC120 PC Boards|
I finally found a schematic of a PC120. It's the "Noise Blanker" board. It
also includes the First Mixer and First I.F. Amp on the same board (the same
circuit as the PC100).

What was throwing me off here was the fact that this PC120 board has an IF
Amp IC circuit that is very similar to the 2nd IF Amp, so I thought that the
PC100 and PC200 circuits had been put on one board. Wrong. :-) It's only
the PC100 circuit that is on this PC120 board, plus the noise blanker
circuit.

Now, another question....Obviously, someone replaced the PC100 board in my
Atlas 180 with this PC120 board. But, was this a 'field mod', or did the
factory provide this as an option for the Atlas 180?

John - KR0Y
| 314|310|2002-04-25 21:52:52|John Rayfield, Jr. - KR0Y|Re: Atlas210x--> Re: Atlas 180 Power Output|
Got another question...

On my Atlas 180, I'm only able to get about 75 watts output on 20 meters
(maybe a bit more, with 13.8 volts at the power connector - I measured about
13.16 at the connector for about 70 watts output on 20 meters). On 40
meters, I can get out a minimum of about 100 watts, on 75 & 80 meters about
80 to 90 watts, and on 160 meters about 50 watts or bit more.

Is the above 'normal' for these rigs, or is the power output a bit low on 20
meters on mine?

John - KR0Y
| 315|310|2002-04-26 02:54:34|Uwe Sievers|Re: Atlas210x--> Re: Atlas 180 PC100 & PC200 PC Boards|
Hi John,
I do not understand your problem... what you are looking for?
I have a manual of the Atlas 180 in front of me..
the mixer alone is the same on both boards PC100 and PC200
you should know that the early version of the Atlas 180 have a much smaller PC100 board then
the later ones... instead 22 pins on the connector it has only 15 and the Relay is not on the
board.. they have used a complete different Relay combining the PC100 Relay with the
antenna relay... but that is the only difference the circuits itself are nearly the same on the old
and on the new version of PC100... so please explain what is the specific problem you have
with your 180.
73 de Uwe DJ9XG currently in Florida
| 316|310|2002-04-26 03:21:29|Erik Westgard|Re: Atlas210x--> Re: Atlas 180 PC100 & PC200 PC Boards|
My Atlas 210a is reported to have "distorted" SSB audio. The receive is
fine. Any ideas what could be causing this?

Erik, NY9D


-----Original Message-----
From: Uwe Sievers [mailto:uwsievers@...]
Sent: Thursday, April 25, 2002 10:14 AM
To: atlas210x-215x@yahoogroups.com
Subject: RE: Atlas210x--

Hi John,
I do not understand your problem... what you are looking for?
I have a manual of the Atlas 180 in front of me..
the mixer alone is the same on both boards PC100 and PC200
you should know that the early version of the Atlas 180 have a much smaller
PC100 board then
the later ones... instead 22 pins on the connector it has only 15 and the
Relay is not on the
board.. they have used a complete different Relay combining the PC100 Relay
with the
antenna relay... but that is the only difference the circuits itself are
nearly the same on the old
and on the new version of PC100... so please explain what is the specific
problem you have
with your 180.
73 de Uwe DJ9XG currently in Florida
| 317|310|2002-04-28 02:59:28|Uwe Sievers|Re: Atlas210x--> Re: Atlas 180 PC100 & PC200 PC Boards|
Erik,
first step measure the idle current of the PA... should show an indication on the built in S-
Meter of about 0,5-1A... (without modulation).. in many cases the idle current is too low,
that means the PA in running in C-Mode instead AB to B-Mode... so check this first and if no
or not enough idle current is there increase ist with the pot in the PA (thru a hole accessible
in the heatsink)
second step replace all electrolytic capacitors in the mic-amp stages on PC300.. in many
cases these capacitors become dry and do not work any more because of the age of them
if possible use tantalum capacitors they are more reliable then the electrolytic ones)
73 de Uwe
| 318|310|2002-04-29 03:27:36|Erik Westgard|Re: Atlas210x--> Re: Atlas 180 PC100 & PC200 PC Boards|
Uwe,
Thanks. Great advice.
Erik

-----Original Message-----
From: Uwe Sievers [mailto:uwsievers@...]
Sent: Thursday, April 25, 2002 9:46 PM
To: atlas210x-215x@yahoogroups.com
Subject: RE: Atlas210x--

Erik,
first step measure the idle current of the PA... should show an indication
on the built in S-
Meter of about 0,5-1A... (without modulation).. in many cases the idle
current is too low,
that means the PA in running in C-Mode instead AB to B-Mode... so check this
first and if no
or not enough idle current is there increase ist with the pot in the PA
(thru a hole accessible
in the heatsink)
second step replace all electrolytic capacitors in the mic-amp stages on
PC300.. in many
cases these capacitors become dry and do not work any more because of the
age of them
if possible use tantalum capacitors they are more reliable then the
electrolytic ones)
73 de Uwe
| 319|319|2002-05-22 17:04:08|Johnny Electron|Dayton?|
Did anybody find any good Atlas equipment at the Dayton Hamfest /
Hamvention last weekend?


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| 320|320|2002-05-23 04:42:55|peter oesterle|Re: Atlas210x--> Dayton?|
Yes I did. Got 2 210xs. Saw one that was set up with almost a factory
display on the dial drum that covered 11metres with channels marked.
I am selling a DD6 and an AC console with the vox unit in it. I will be
at Howard County fairgrounds on Sunday.
73 Pete.
Ps Atlas 210x beat the ft100 and ft817 on field day last year. It
could hear and work em where the DDS in the FTs bothered each other.
Compound phase noise problem.


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| 321|320|2002-05-23 06:46:42|Ben Kadish K8DIT|Re: Atlas210x--> Dayton?|
Does anyone know if there are alternatives that will work in place of mrf
454 as finals for the 210 215x? Ben K8DIT
| 322|320|2002-05-23 12:38:34|sasi nayar|Atlas210x going split?|
Hi folks
Is there anyway I can operate split QRG's with my
210X? Eventhough I own one, I am yet to see it! ;-(
Its still lying in the states and would be picking it
up in June! ;-)
73
Sasi
9V1SM / VU3SNM



=====
Amateur Radio For Global Peace and Fraternity
----------------------------------------------
Sasi Nayar, 9V1SM / VU3SNM,
Reef Ecology Lab, Department of Biological Sciences
National University of Singapore,10 Kent Ridge Crescent
Singapore 110 260. Tel : (65) 778 7112; Fax : (65) 774 9654;
URL:http://www.dbs.nus.edu.sg/lab/reef/SasiNayar.htm

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| 323|319|2002-05-23 13:59:07|Erik Westgard|Re: Atlas210x--> Dayton?|
A single 210x ($175) and a base power supply and readout. I was looking for
a final amp board still for my 210x.
Erik

-----Original Message-----
From: Johnny Electron [mailto:toledohamradio@...]
Sent: Wednesday, May 22, 2002 10:04 AM
To: Yahoo Group Atlas 210X
Subject: Atlas210x--

Did anybody find any good Atlas equipment at the Dayton Hamfest /
Hamvention last weekend?


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| 324|320|2002-05-23 23:20:35|ve3pyg@rac.ca|Re: Atlas210x--> Dayton?|
On 22 May 2002, at 21:47, Ben Kadish K8DIT wrote:

I am using a matched pair of MRF455's. $27 the pair from R.F.
Parts

Dr. David G. Stephenson, VE3PYG,
Merrickville, On. Canada: dstphnsn@....

"Happy the humble state of the scholar who retires from this malicious
world, and in the pleasant countryside, with modest table and board,
governs his life with God alone, and passes his days by himself,
neither envied nor envying." de Leon (under process by the Inquisition)
| 325|320|2002-05-24 04:49:45|Paul Arnold|Re: Atlas210x--> Dayton?|
I went to Dayton again (trip #12) and made most of the flea market and
only saw one fairly unkept and modified 210X. I guess people are
holding on to these little jewels - I sure am. Dayton is great, even
though we had a pretty wet Friday, it was worth the trip.

KØSEP
| 326|326|2002-05-26 06:38:11|Ben Kadish K8DIT|Carrier Oscillator Crystals 5520, 5523.3 khz|
I need both of these crystals to resore two seperate 215x s. They are the sb
xtals
x601, 602 on pc600 on either the 210x or 215x, maybe even the 210/215.
Please state condx. and price. ben k8dit
| 327|326|2002-05-26 10:08:49|sasi nayar|Going split|
Hi all
Sometime back I posted this question and got no
replies. I am reposting it again.

It might sound a bit dumb, but can one operate split
on a 210X? My radio has not reached my hands yet,
hence I have little idea.

If not, is there a way it can be done?

Considering the fact that most Dx peditions operate
split I wonder whether this can be configured like any
modern radios?
73
Sasi
9V1SM / VU3SNM


=====
Amateur Radio For Global Peace and Fraternity
----------------------------------------------
Sasi Nayar, 9V1SM / VU3SNM,
Reef Ecology Lab, Department of Biological Sciences
National University of Singapore,10 Kent Ridge Crescent
Singapore 110 260. Tel : (65) 778 7112; Fax : (65) 774 9654;
URL:http://www.dbs.nus.edu.sg/lab/reef/SasiNayar.htm

__________________________________________________
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| 328|328|2002-05-26 15:28:01|Ben Kadish K8DIT|Re: Atlas210x--> Going split|
Since there is no outboard vfo available for the 210/215x, then no split
operation is possible. There is not even an RIT on either. So, you would
need a separate reciever than would mute when the 210/215x is in transmit.
The outboard rcvr would be tuned to the dx station, while the 210/215x is
tuned to the xmit frequency. You could mute an ext. rcvr by using the lin.
amp. line on the aux. plug. The Atlas 350xl had an aux vfo available as an
option, but non was made, that I know of for the earlier xcvrs.
| 329|329|2002-05-26 16:01:57|RUDOLPH KING|Re: Atlas210x--> Carrier Oscillator Crystals 5520, 5523.3 khz|
Ben:- try contacting the following crystal manufacturer ;- Jan Crystals in Ft Myers Florida, their website is www.jancrystals.com
I do believe the xtals you nedd would run about $23.00 each
Rudy King
rudyking@...

| 330|329|2002-05-27 05:54:34|Paul Arnold|Re: Atlas210x--> Carrier Oscillator Crystals 5520, 5523.3 khz|
I think I would just buy new crystals from either JAN Crystal or
International Crystal. Why take a chance on used ones unless the new
ones are too over priced?

KØSEP
| 331|328|2002-05-27 05:58:07|Paul Arnold|Re: Atlas210x--> Going split|
I don't think split operation is a normally available function or easy
modification to the Atlas radios. Atlas made an outboard oscillator
that holds several crystals, but you'd have to switch it on and off at
each transmission - not very practical. This unit was made for "net"
operations, etc. I believe you'd probably have to do some serious
modifications to operate split with this radio.

KØSEP
| 332|332|2002-05-28 10:18:12|wa6rsv|Atlas 210X approved service anywhere (reputable :-)|
Hi and thank you for reading this

I own an ATLAS 210X with the Console and it works OK , In fact I
fired it up for the first time today (after 5 years of letting it
rest :-) and worked Vk's from LAX ...It's rock solid great modulation
and no hum...But...on 20 and up it ONLY puts out 50 watts or less and
the reception although good needs to be fined tuned I think.

Can anybody recommend an reasonable, reputable Outfit (preferably in
So-Cal)where I can get the rig in top shape since I intend to keep
the little tyke until I can get $1000000 on Ebay or die of old age
whichever comes first :-).

And would you be so kind as to email me the response since I seldom
get on the net anymore.

Thank you most kindly

Pablo Lewin
WA6RSV
pablotwa@...
QRZ.com OK....
| 333|332|2002-05-28 10:38:32|Uwe Sievers|Re: Atlas210x--> Atlas 210X approved service anywhere (reputable :-)|
Hi Pablo,
I know via email a ham who had been working in former times for Atlas Radio and is now
part time working for RF-Parts... his name is Robert Craik... his email address is
wa6gyg@... and he lives in in San Marco area in southern CA
to your problem... before you do anything try to check the SWR on 20,15 and 10m...
may be you have an higher SWR and the internal protection circuit of the Atlas is
avoiding...
max. output because of that... on 10m you will not get more then 50-70 watts output
that,s normal...
best 73,s from Germany
Uwe DJ9XG

To: atlas210x-215x@yahoogroups.com
From: "wa6rsv" <pablotwa@... Date sent: Tue, 28 May 2002 08:18:09 -0000
Subject: Atlas210x-- )
Send reply to: atlas210x-215x@yahoogroups.com

| 334|332|2002-05-28 16:39:41|Ben Kadish K8DIT|Re: Atlas210x--> Atlas 210X approved service anywhere (reputable :-)|
The man who repairs Atlas of all ilk is Glenn Boodey K8EYU who has
advertised in World Radio magazine for decades. gcf@... gets you
started. He's brought back 3 of mine that were in various states of
disrepair having bought them on ebay or found at flea markets. He undoes the
mods and puts them back in spec. as if Herb Johnson himself were doing it in
his prime. Maybe better IMHO. If it's a basket case he'll tell you up front,
if he has your email address, or phone number, before he digs in for
repairing, in case you didnt want to spend a lot on it. He has certified
equipment and does a professional job at current fair market. In my first
venture with Glenn, he fixed a 350xl that had 4 mods in it that a subsequent
tech had taken it so far out of alignment it had no chance of working
properly, until the mods were undone and then realigned. Now it adorns the
shack as the late 350xl MarkII with VFO and works just wonderfully. I have
since fit it with a 17 meter crystal and it works nicely there. Glenn
realingned it for 17m, as at first I was getting only 100 watts out. now
150. Glenn is in N.W. Washington state.
| 335|332|2002-06-01 05:37:14|wa6rsv|Re: Atlas210x--> Atlas 210X approved service anywhere (reputable :-)|
Uwe

thank you for the response...I am getting less than 50 Watts even
when using a dummy load...my TH6DXX has virtually now SWR ;-)...

thanks for the advise.

73's es DX

De

WA6RSV
Pablo Lewin

| 336|336|2002-06-14 17:15:14|Johnny Electron|Any Atlas at Hamfests?|
Anybody had any luck finding any pieces/parts for the Atlas rigs from
any recent Hamfests? I haven't seen a thing.

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| 337|337|2002-06-14 18:05:33|Ben Kadish K8DIT|Re: Atlas210x--> Any Atlas at Hamfests?|
I wrote a review on the subject of Atlas 21x at eham.net relating to getting
help repairing our little radios. www.eham.net/reviews under the hf radio
category.
I discovered the rough and reddy nature of this radio at glenn's shop.
I otherwise wouldnt have had much to do with such a hard to find and deal
with radio, unless its finer points had been pointed out to me by someone.
who knew? A couple of years ago I discovered a used Omni 6 plus after having
had only import radios, I bought it and began selling off my imports in
favor of discovering and enjoying American made radios. What followed is a
random series of older rigs that have been restored and are now qrv in the
shack. Drake, Atlas, Heathkit and Ten tec, old and new now are my focus in
the hobby. Im up to eight rigs and holding. I do have the new TT Jupiter and
so I'm not just into the old stuff. Man, what a radio!
| 338|337|2002-06-15 20:14:34|Paul Arnold|Re: Atlas210x--> Any Atlas at Hamfests?|
Greetings;

I've seen several Atlas rigs at various hamfests. Most recently at
Dayton (a very ugly 210X for $75.00 and a beautiful like new 180 model
for $250.00). I had bought a fairly rough and unknown 210X for spare
parts several years ago, but found it worked pretty good so I haven't
parted it out yet. These are great little radios and most people don't
realize how good they are. They follow the KISS principle (keeping it
simple....).

KØSEP
| 339|337|2002-06-15 21:46:48|Dave|Re: Atlas210x--> Any Atlas at Hamfests?|
Well guys I have been looking for an Atlas 350 for quite a while. Every time
I think I have tracked one down, it has either been sold, or the person says
it is a 350 when it isn't. If anyone knows of an Atlas 350 for sale then
please mail me directly. g3vfp@...

Thanks,

Dave G3VFP
| 340|340|2002-06-28 05:55:30|toledohamradio|What's a decent small antenna for an Atlas?|
What's anybody's suggestion for a small compact antenna (possibly
even in an attic) that will work half-way decent with an Atlas 215?
Would like to be able to at least transmit half-way across the state.
| 341|341|2002-06-28 07:34:28|Ben Kadish K8DIT|Re: Atlas210x--> What's a decent small antenna for an Atlas?|
My choice would be a carolina windom for 20 meters. Its 65' long and off
center fed. It's good for 20-15 with a tuner. String it up anywhere near
what the directions tell you and youll do lots better than half way accorss
the state.
For 160-40, if you cant do wire, loaded verticals will just make you angry,
especially if you live in an urban or suburban area. That leaves you with
those geeky loaded antennas youll find in the catalogues for apt. dwellers
and anti antenna developements. Forgetaboutit. Get good with long wires,
read about them, try them and dont be afraid of using them. No coax needed.
Random wire antennas rule-with practise. With the right gauge wire, noone
will know you have one up. I live on a city lot that I am large and in
charge upon. That means Im not married and there are no antenna
restrictions. So, I put a 52'crankup in the center of the backyard. Ive got
a 2 element lightningbolt quad on it. I use a 80 meter carolina windom, 130'
long and a random wire with a Unique Wire Tuner, no longer made, that tunes
it on 160. With that setup, Ive maximized effective radiated power without
getting too radical. Drill through the wall and suspend a wire in whatever
latex goop you like to use for a transmission line lead. So what if someone
touches it, you probably arent transmitting throught it at that moment
anyway!
| 342|341|2002-06-28 12:44:49|Ben Kadish K8DIT|Re: Atlas210x--> What's a decent small antenna for an Atlas?|
correction: 20m carolina windom is 35' long, not 65'.
| 343|343|2002-06-28 18:31:27|vu3snm|Excellent deal on QRZ|
Hi Atlas lovers
There is a 210X on QRZ going for US 150/-. Sounds like an excellent deal
Check it out at
http://www.qrz.com/cgi-bin/ikonboard.cgi?act=ST&f=1&t=14158
73
Sasi
9V1SM / VU3SNM
| 344|341|2002-06-29 03:39:22|Rick McKee|Re: Atlas210x--> What's a decent small antenna for an Atlas?|
What about a Magnetic loop that is remote tuned via a small DC motor - do
a search on Magnetic loops at: www.google.com

You'll definitely talk farther than across the state ! had mine about 5
feet of the ground the other day and talked to Boulder,Colorado and I
live in Southern Ohio ! My Mag loop is built out of 5/8'' copper tubing
and is only 32'' in diameter ! Oh yeah, the Colorado contact was on 20
meters.


Rick McKee, KC8AON
Willow Wood, Ohio
QRP - Do more with less !


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| 345|340|2002-07-01 04:46:53|sasi nayar|Re: Atlas210x--> What's a decent small antenna for an Atlas?|
Try
1.the buddipole at
www.qsl.net/w3ff
www.buddipole.com
OR a coax trap dipole
http://www.nerc.com/~jdegood/coaxtrap/

I have both of these and they are
wonderful..particularly the first one!
73
Sasi

9V1SM / VU3SNM




--- toledohamradio <toledohamradio@... =====
Amateur Radio For Global Peace and Fraternity
----------------------------------------------
Sasi Nayar, 9V1SM / VU3SNM,
Reef Ecology Lab, Department of Biological Sciences
National University of Singapore,10 Kent Ridge Crescent
Singapore 110 260. Tel : (65) 778 7112; Fax : (65) 774 9654;
URL:http://www.dbs.nus.edu.sg/lab/reef/SasiNayar.htm

__________________________________________________
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| 346|346|2002-07-17 14:22:00|n5xxx|Atlas 215X Dail Broken|
Hello Group,

The name here is Bob and the call is N5XXX and I was wondering if
anyone knows where I can pick up a frequency dial for a Atlas 215X.
It was broken once before and was glued back together and now the
glue and plastic is breaking down and its starting to slip!

I am working on my general ticket and was wondering if anyone uses
this radio mobile?

Thanks in advance and look forward to hearing from each of you!

Bob
N5XXX
Brandon, MS
| 347|347|2002-07-17 14:32:23|wrsekul@aol.com|Re: Welcome to atlas210x-215x |
In a message dated 7/17/2002 7:18:54 AM Central Standard Time,
atlas210x-215x-owner@yahoogroups.com writes:


Wm. Robert Sekul
365 Durham Court
Brandon, MS 39047-8038
Phone 601-992-1981 Home
Phone 601-939-0420 x 304 Work
wrsekul@..." 6019291491@..."

[Non-text portions of this message have been removed]
| 348|348|2002-07-27 18:28:09|Rick McKee|Hamfest, In case anyone is interested !|
In case anyone on the list is interested, and this is a nice hamfest and
a fairly big one at that. I will be there with a table and will have the
2M HT along on 146.46 simplex. If anyone decides to come by, give me a
shout so we can have an eyeball QSO.

Hope to see you there,
Rick, KC8AON

Huntington, WV Hamfest and Computer Show 2002

Saturday August 10 Veterans Memorial Field House
8:30 am to 2:00 pm 2590 5th Avenue
VE Testing Huntington, WV 25701
At 10:30 am

Sponsored By: Tri-state Amateur Radio Association (TARA)

Free parking at Kroger Store across street from Hamfest

Grand prize: $700 gift certificate from Ham Radio Outlet
Also to be given away: 50 watt 2M Mobile
2M HT
2 mag mount 2M antennas

Entrance tickets $5
Flea Market tables (if payment is received by July 31) $8
Flea Market tables (after August 1 or later) $12
Electricity at table or display (per plug) $10

Talk in frequency is 146.760 (minus offset) PL tone: 131.8 or send DTMF
11 to open Squelch

To reserve tables: VE Testing
contact:
Philip Beckett, AB8ME Garry Ritchie,W8OI
AB8ME@... (304) 733-1300
(304) 429-6114 19 Pinecrest
Drive
29 Valley View Drive Huntington,WV
25705
Huntington,WV 25704 Testing starts at
10:30 am

E-mail: tarahams@...
TARA website: http://www.qsl.net/tara ARRL Approved Hamfest


________________________________________________________________
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| 349|349|2002-08-23 17:32:02|k8kqd|Atlas 210X with SG-237|
I made the mistake of buying the SG-237 instead of the SG-239 antenna
tuner for my Atlas 210X xcvr (circa 1974) without reading the manual
first. The SG-237 is rated at 100 watts and the SG-239 is 200 watts.
The Atlas manual says that the Atlas produces 200 watts input and 80
watts minimum output. The word "minimum" bothers me.

The retailer says that he thinks it's OK to use the Atlas with this
tuner. I also wrote to SGC and their reply indicated that they
think that an Atlas 210X is a KW linear amplifier.

Has anyone had any experience with the Atlas with these tuners to
know what kind of actual output I might expect to produce into the
tuner or antenna? I don't want to fry a new tuner here. The table
below looks like it might work OK. If not, the tuner won't do me
much good because I don't have any HF gear with less power.

The Atlas 210X manual has this table:

SWR VERSUS OUTPUT
SWR APPROXIMATE OUTPUT NOTE
1.0 100 watts High SWR will not damage the
1.1 98 watts Atlas transceiver. You may feel
1.2 95 watts free to operate regardless of the
1.3 90 watts SWR. Only power input and
1.5 80 watts output will suffer. Reflected
2.0 50 watts voltage will not cause damage.
3.0 20 watts

I want to use the Atlas and tuner into a "CB" antenna on my truck.
What kind of SWR might I expect to see with that kind of installation?

73,
Lorne, K8KQD
Eustis, FL
| 350|350|2002-08-24 05:20:58|Paul Arnold|Re: Atlas210x--> Atlas 210X with SG-237|
Lorne;

I also recently purchased the SG-237 and use the Atlas 210X. I'm not
sure about the true output power of my Atlas, but it works fine with the
237 and a random long wire. I haven't tried it yet with a whip, but
plan on this soon. I had been trying an old MFJ-901 tuner with a
similar long wire and had a terrible time trying to tune it. The 237
tunes in a flash! I discussed power with SGC before ordering the 237
and they only cautioned about using it with continuous carrier modes
like AM and FM, there they recommended keeping the power down to about
40 watts.

KØSEP
| 351|349|2002-08-24 06:42:26|sasi nayar|Re: Atlas210x--> Atlas 210X with SG-237|
If I am not mistaken a 210X (the one I played) around
with does not produce more than 120W. Certain radios
put out 120W and certain others 100W only. I dont
forsee a problem using the presently rated tuner.
73
Sasi
9V1SM / VU3SNM


=====
Amateur Radio For Global Peace and Fraternity
----------------------------------------------
Sasi Nayar, 9V1SM / VU3SNM,
Reef Ecology Lab, Department of Biological Sciences
National University of Singapore,14 Science Drive 4
Singapore 117 543. Tel : (65) 6778 7112 URL:http://www.dbs.nus.edu.sg/lab/reef/SasiNayar.htm

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| 352|352|2002-08-27 06:39:22|Johnny Electron|In Need of a 210X?|
Fellow Amateurs,
Anybody looking for an Atlas 210X to repair or to use for parts? I can't
afford to pull-out any more of my hair trying to repair the 210X, so please
contact me directly off-list if interested.
73's
John K8DAD

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| 353|350|2002-08-27 07:09:00|Tilman D. Thulesius|Re: Atlas210x--> Atlas 210X with SG-237|
I would not push the 210 for mor then about 80 w ouput.

Do not forget that the output-transistors are of the more fragile sort.
If you swap them for Motorola ( think it is MRF454 I have ) you
can do about 100 - 120 without blowing them.

/ Tilman SM0JZT

sasi nayar wrote:

[Image]
[Non-text portions of this message have been removed]
| 354|350|2002-08-27 07:47:41|sasi nayar|Re: Atlas210x--> Atlas 210X with SG-237|
Tilman
You are probably right. The one I played with was
probably modified with the power mosfets changed. It
wasnt mine. I was told that one can get about 100W on
20 and 15 and less on 10 (provided one has a well
tuned antenna). My 201X is still stuck in the states
and cant really test it out until I get it later this
year! ;-(
73
Sasi
9V1SM



=====
Amateur Radio For Global Peace and Fraternity
----------------------------------------------
Sasi Nayar, 9V1SM / VU3SNM,
Reef Ecology Lab, Department of Biological Sciences
National University of Singapore,14 Science Drive 4
Singapore 117 543. Tel : (65) 6778 7112 URL:http://www.dbs.nus.edu.sg/lab/reef/SasiNayar.htm

__________________________________________________
Do You Yahoo!?
Yahoo! Finance - Get real-time stock quotes
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| 355|355|2002-08-29 09:05:58|sparks06524|Need VOX schematic for 220-CS/vox|
Hi,
Does anyone have a schematic for the VX-1, the optional unit that was
typically installed in the 220-CS power supply?
I bought a supply complete with the VOX but it's been disconnected
and discombobulated.

tnx,
Doug/WA1TUT
| 356|356|2002-09-02 10:27:25|sparks06524|Need front panel for a 210X|
Does anyone have available a decent front panel for a 210X?
I'd consider a whole junk chassis if necessary.

tnx,

Doug/WA1TUT
| 357|356|2002-09-02 12:05:11|Patricio F. Alvarez|Re: Atlas210x--> Need front panel for a 210X|
Hi! I´m also interested on a front panel for a 210x

Thanks!

Patricio
-----
patalvarez@...
icq#:16559341
MSM: p_a_t_r_i_c_i_o@...


- - - - - - - - - - - - - - - - - - - - - - - - - - -| 358|358|2002-09-17 03:23:45|jcjarv|cs220|
I got a cs220 today and checking the dc volts out found it is running
17 to 18 vdc with no load. Is this normal or does it have a problem?
Since this is the first time for a cs220, I don't know.
| 359|359|2002-10-06 17:20:20|wb6rlg|Former Employes of Atlas??|
Well just checkin to see if there are any Atlas former employee's on
here. Best job I ever had was working for Herb Johnson. Just a point
was not that tecnical so don't ask questions of that sort, I may not
have your answer. I am now just replacing all my Atlas gear, I sold
it all to raise kids so will finally get stuff back. So anyway great
to find a site for Atlas.
73 DE WB6RLG
Larry
Williams, Az
www.bwmrc.com
| 360|360|2002-10-06 17:26:35|Tilman D. Thulesius|Re: Atlas210x--> Former Employes of Atlas??|
Larry

So what was your position within Atlas.

I have 2 x 210 X and non X here and love them.

It is great to have this equipment knowing that Herb (ert) was a
coming from a Swedish family.

With his father having a very common Swedish first name.

SVEN ( SWAN ) being as common as John in the US.
Also the name Johnson is still a common surname. Like Smith......

Never mind.

I hear the the assembly of the equipment was not always done inhouse
but being housewifes sitting at the kitchentable putting them
together...... ;-)

Please shed som light on how things was in these times.

/ Tilman SM0JZT ( living outside Stockholm ( Capital city of
Sweden ))

wb6rlg wrote:

--
Tilman D. Thulesius
Kungsängen / Sweden
tt@...
+46 8 584 50045



[Non-text portions of this message have been removed]
| 361|360|2002-10-06 18:12:05|Ben K8DIT|Re: Atlas210x--> Former Employes of Atlas??|
Any stories you would have pertaining to rigs, their assembly, or just
interesting stuff would be fun to read.
I own a 215x and an 350xl mkII w/vfo.
These rigs represent the successful
replacement of solid state from tubes, both in transmit and recieve. Solid
state finals and drivers were still lacking some performance issues, but
that didnt inhibit progress. Both my rigs have mrf 454s replacing original
devices. The driver in the 215x had to be replaced as well. The driver in
the 350 fortunately is pretty reliable, it is impossible to replace w/o
modifications.
| 362|360|2002-10-06 21:10:26|peter oesterle|Re: Atlas210x--> Former Employes of Atlas??|
Hi Ben. Nice to see an interest in the Atlas . My first wxperience with
an Atlas 210x was from a buddy of mine who passed away last year Harry L
Sands III Wa4BGM. He introduced it to me in 1976. He was running it in
his VW station wagon I believe. I had moved down here to pennsylvania with
my parents then. Met him aon the local 2 metre repetaer and he described the
Atlas to me. I was always intrigued with mobile radio operation so I invited
him over. We have been friends ever since then, up until he passed away last
year. Of all the radios I have owned the Atlas 210x ranks among the
highest number of them. To this day I own at least 9 of them. All in various
states of repair and disrepair.
I was still a poor student when I got into ham radio in 1973. It was
not until 1978 that I got my first Atlas 210x. Its selectivity and
portability won out over the Kenwood TS520s transceiver i owned previously.
Well I ordered it from one of the dealers, and it arrived one afternoon as
i got home from the local branch campus of Penn State University. I couldn't
wait to try it. Well as I opened it up , I was dissappointed to see that it
had been droppped during shipping and the Pa section was hifted almost 3/4
in to one side. Well I was heartbroken, but I tried it anyway. It worked
wonderfully. The antenna I used was a 15 M vertical ground plane with 100
feet of 60% shielded Radio Shack RG8 coax. Any reflected power never showed
up back at the rig, it was radiated back into space through the leaky
cable. So the system was a good match for 15 M and 10m too.
I happened to catch antarctica on 15 m , gave them one call on phone and
they came right back to me in the midst of a pile up. They gave me a
wonderful report. I was impressed that such a small black box could work
Antarctica. On another occasion I happened across VE8 RCS in Alert
Northwest Territories Canada. The top of the world this time! Same setup.
Impressive.
Another time caught Ulrich Rhode DJ2LR of world reknowned Rhode and
Schwarz on 40 m phone . i asked his opinion on the Atlas. He was very
impressed with the direct mixer design, and broad band circuitry. He liked
it a lot. This of course fed my ego even more. A brief encounter with a
radio guru, and a good one too.
I eventually got the radio replaced under warranty. It was a painless
effort. The replacement radio arrived and immediately I couldn't wait to
getback on the air. I owned ( yes ) a 1976 AMC Gremlin at the time. The
fancy X version. Black interior with no air conditioning ( mistake) and a
a 3 speed stick shift with electric overdrive. The car was built in my
hometown of Brampton Ontario by my former neighbours in Canada. It was
bought and delivered to Pennsylvania. Anyway, I got the mobile mounting
bracket for the Atlas and needed some room to install it in the car.Well it
fit nicely under the centre of the dashboard just in front of the shifter.
Matche dthe interior too. I ran a bumper mounted hygain hustler on 75 m
phone to talk with my buddies back home in Brampton. It was a blast. I ran
15m phone for quite a while and 10m phone very often.
I got to looking at Qst magazine and noticed an ad for preamps from
hamtronics. They were reasonably priced so I ordered one for the 10 m band.
It had a dual purpose in that I would also use it for the OSCAR satellites
on receive. I installed it inside the radio and had a toggle switch on the
front panel to take it in and out of circuit. It was wired after the band
pass filter. The radio heard like the dickens on 10m. I remember setting the
radio up in the apartment at college and hearing Oscar 7 I believe
sending erratic beacon messages and never hearing it again. Oscar 7 has re
appeared recently after 20 some years.
I wanted a matching power supply, so i looked athe schematic for theirs
and saw it was a very economical design. The PA used an unregulated 12 volts
from a full wave centre tapped rectification scheme. That alone provided
some regulation which was fine for the PA. It was current hungry that was
all. I ripped apart an old Zenith TV set that had tubes and a wonderful
power transformer that was about 1/4 inch shorter than the height of the
Atlas 210X. Well I chiseled away the epoxy and stripped down the tranformer
to its primary winding after removing the Es and Is of the core. I rewound
the secondary by hand with No 10 guage enameled transformer wire. I also
centre tapped it. I got about 14 volts dc after I wired a par of rectifiers
and a filter cap to it. Now all I needed was a nice cabinet. I wrote to
Atlas Corp. requesting a cabinet cover top and bottom and described my
intentions. They charged me 12 dollars for the 2 items and threw in a
subchassis
for free. I was tickled. The power supply turned out beautiful with a
brushed aluminum front panel and a pass transistor on a heatsink mounted on
the back. It was beautiful and worked like a champ.
Well the digital frequency counter on the TS130s from Kenwood intrigued me
and a friend had the radio. I like it a lot. I have to say the extra bands
and the digital display seduced me to the pont where i sold the Atlas 210X
in favor of the ts 130s.
Mny yrs later I picked up another atlas 210x. I installed a broadband
preamp and attenuator so I was able to play with the receiver a little
more. Also installed an audio notch filter and audio bandpass filter using
some boards from Selectone. It made 40m contacts at night very nice. I
picked up another 3 after that one. Then the TS50 came out from Kenwood.
That was a fun radio. Those radios have come and gone .
More recently I have owned an FT100from Yaesu and an FT817. These`were
used on field day in close proximity to another FT817, synthesized
transceiver. Well you guessed it , noisy local oscillators and synthesizers
made the 2 field day stations battle difficult to live with each other. I
pulled out the 210X and the interference was minimal from the FT817 cw
station next door. We were able to work everyone we could hear on phone. The
selectivity was amazing. The monkey chatter was hardly bothersome like it
was with the synthesized radios. It was great. It was like a moving a slot
across the band with the receiver. Fantastic. And all done with single
conversion and no DSP. Amazing.
I have since learned about local oscillator phase noise and other nasty
things that are not conducive to good receivers. Also learned that the
ELECRAFT K2 HF transceiver is also single conversion and boasts an extremely
low receiver noise floor. I have spoken with a few fellows about the Atlas
210x and the ones that knew radio and receivers suggested that i change the
mixer diodes to some HP5082 schottky diodes. One fellow that told me this
said the receiver was scary. It was dead quiet until you tuned across a
signal , then the audio jumped out at you. I must try this yet. I understand
there was a DL7 or a DJ7 that rebuilt the mixer circuit in the radio.
All in all it is an awesome line of radios, lots of room for some
improvements, and a lot of fun. I have owned the 350 XL also. It heard very
well. Quite a value on the used market too I might add. they had a
reputation of blowing out PAs I understand. The power supply could have used
some ac spike suppression . What a receiver though.
I laugh when I remember hearing a fellow on 20m talking on his Yaesu
ft980, his audio was mushy had no presence and was muffled. Then he got on
his "crappy old little Atlas 210X" and his signal was stronger, the audio
was improved 200%. Just goes to show you simple is sometimes better.
Well Ben thats some of my experiences with the Atlas. A fun little radio
no matter how you slice it. Always made me smile that little radio.
73 Pete Oesterle VE3HOH/W3 ve3hoh@...
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| 363|360|2002-10-06 22:12:50|Ben K8DIT|Re: Atlas210x--> Former Employes of Atlas??|
Wow! That was very interesting Peter. I never imagined such stories existed.
Your experiences, with others ought to find a way into a collection of
stories.
My introduction to the radio came with getting to know one of the local hams
here in this part of the world. He actually repairs Atlas' of all models and
has done so since the mid 80s. He's now retired from being an RF engineer,
and has always had alot of praise and respect for the design and
execution of these radios. I have learned to appreciate them through him. I
am not technically savvy enough to really know what's what, but I have
enjoyed using my radios from time to time. I also use Ten Tec, Heathkit, and
Drake radios. I have had experience with many import radios and prefer the
domestic product. I was first licensed in 1961 at the age of 13, but left it
after passing the general at 14, having reached a respectable code speed of
about 30wpm. I returned to ham radio in 1985, just before turning 40. Im 55
now and operate daily in either my mobile setup or the rig at home. I have
collected the following radios: Ten Tec, Omni 6+, Scout, Jupiter,
2 Omni Ds, Heathkit, 303/401, Marauder, Drake TR-7, Hallicrafter SX101A. I
use the scout mobile with a Metron Amp. I use a Ten Tec Centurion in the
shack. I have a 52'
crank up tower with a Lightning bolt 2 element quad, a Radioworks Carolina
Windom, and a Random wire antenna for 160. That'll buy me alot of ham radio
fun.
| 364|360|2002-10-07 00:00:33|peter oesterle|Re: Atlas210x--> Former Employes of Atlas??|
Hi Ben . Ifailed to mention , I also had a pair of Tr7s from Drake, which I
really liked a lot. Also owned a couple of Drake C lines and a Bline too.
they are still in boxes here somewhere. I believe the Atlas 350XL could
have been the forerunner to the Drake TR7. I don't know how quiet the LO was
in the TR7 being that it was synthesized.
I'd love to find the old power supply that I built for the 210X. I keep
looking hoping I find it again.
I would love to hear other stories myself. I am sure there are plenty
about the first all solid state 100watt mobile HF transceiver!
73 Pete VE3HOH/W3


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| 365|365|2002-10-07 14:11:35|TLNixon|Wow|
Wow Peter, what a fantastic post!

I have a pristine Atlas 210X with the concole Ps, NB, , mobile mount,
and Crystal Oscillator.

The Atlas was my first attempt at HF mobile. Wow the thing worked
like a fine Swiss watch in my Chevrolet Celebrity with a bumper
mounted Texas Bugcatcher antenna.

I bought mine from my old friend and now silent key KA0GVU. Someday I
plan to do the mod installing the MAR device to make the reciever
really light-up. Everyone I ever talked to on mine while mobile just
raved about the audio and the signal. Even when band conditions were
not real good, I was told my signal was not the strongest, but was
very easily heard because of the superb audio quality. One thing I
liked about the 210X was it was simple. It was just about as much
radio as I could manage while driving the car at the same time!

It seems sort of ironic that reading some posts that many of us also
own Drakes (myself an R4B-T4XC and a TR4C) Heathkits etc. It seems
that those of us "in the know" so to speak know quality equipment and
have chosen some of the very best.

My mobile now has an Icom 706 MKIIG (with remote mounting kit)in it
due to space considerations in the minivan I drive. One never knows,
at some point the Atlas may go mobile again!

Terry-WB0VQP
Davenport,Iowa

Someday I'm going to begin using my 210X here in the shack again
daily, as soon as I clear out room for it.
| 366|366|2002-10-07 18:32:19|Tilman D. Thulesius|Re: Atlas210x--> Wow|
Terry

You mention the MAR-modification. Do you have a schematic or reference
to that anywhere that I can get hold of ??

I have swapped the 1N4148 diodes in the fist mixer for HP Schotty
diodes.
That did improve the reciever front end quite nicely.

/ Tilman

TLNixon wrote:

--
Tilman D. Thulesius
Kungsängen / Sweden
tt@...
+46 8 584 50045



[Non-text portions of this message have been removed]
| 367|366|2002-10-08 04:24:59|TLNixon|Re: Atlas210x--> Wow|
Yes I do. It was an outboard crystal oscillator box which plugs into
the accessory plug in the back. It has a trimmer on it for fine
tuning, and a rotary switch so that you can switch in the desired
crystal.

If you have a manual, the schematic is i nthe manual I think. I'll
have to dig out the manuals to find the schematic.

Terry-WB0VQP
| 368|366|2002-10-08 06:53:51|Tilman D. Thulesius|Re: Atlas210x--> Wow|
Terry

Ok thats fine.

I though you meant a HF-amp or post-mixer-amp-modification on the
HF/Mixer-board ( think
it is the PC-100 ) uring them MAR (mmic) amps.

This is a topic that has been discussed back and front here on this
reflector.

When I find the time I will be building myself a completely new PC100 to
update
the front-end of one of mine 210:s


/ Tilman

TLNixon wrote:

--
Tilman D. Thulesius
Kungsängen / Sweden
tt@...
+46 8 584 50045



[Non-text portions of this message have been removed]
| 369|369|2002-10-09 04:26:02|TLNixon|REF:MAR Mod.|
Look in the Files Secion of the Club and it is entitled PC-100 Ver. 3
and Ver.4. There is also a data sheet on the MMIC MAR device in the
Files Secion.

Sorry I misunderstood what you were asking. Think I was half asleep
when I responded to your posts.

Terry-WB0VQP
| 370|370|2002-10-09 07:20:28|Tilman D. Thulesius|Re: Atlas210x--> REF:MAR Mod.|
Terry

If you have a close look at these schematics ( the PDF versions ) you
will see
that I have actually made them drawings ;-)

/ Tilman

TLNixon wrote:

ADVERTISEMENT

[Image]

[Image]

--
Tilman D. Thulesius
Kungsängen / Sweden
tt@...
+46 8 584 50045



[Non-text portions of this message have been removed]
| 371|371|2002-10-09 08:19:25|amateur52us|WANTED DEAD OR ALIVE 210X/215X|
AM I DREAMING OR ARE THERE ANY ....TO PRY LOOSE

73 DAN W6PRL GRASS VALLEY CA
| 372|372|2002-10-09 18:14:19|w8gwi@arrl.net|Atlas210x--> WANTED DEAD OR ALIVE 210X/215X|
Dan,

I have a 210X parts radio complete with Mobile mounting bracket. I believe all is there except the tuning drum. Some wires disconnected and I have never powered it up. I had an excellent 215X and this one came with it for spares. I sold the 215, but the guy did not want the parts radio.

I would take $100.00 for everything. Let me know if you are interested.

73's
Dave
W8GWI
--------- "amateur52us" <foga@...
From: "amateur52us" <foga@... To: atlas210x-215x@yahoogroups.com
Subject: Atlas210x-- Date: Wed, 09 Oct 2002 06:17:30 -0000

AM I DREAMING OR ARE THERE ANY ....TO PRY LOOSE

73 DAN W6PRL GRASS VALLEY CA



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| 373|360|2002-10-10 00:10:25|k4bov|Re: Atlas210x--> Former Employee of Atlas??|
Fellows,

Have not viewed all the archives to see what has been said previously
about former Atlas Employees; but, do know that Bob Craik/WA6GYG is a
former Atlas employee and close long-time friend to Herb Johnson.

I had an opportunity to visit Bob three weeks ago following the Swan
Radio Jamboree 2002 held in Las Vegas.

Those of you subscribed to the Swan-Network Group or Swan-Net
reflector on Topica.com have no doubt seen the reports issued by
Jim/WA5BDR and myself on the success of the Jamboree.

Bob does service all models of Atlas. He gave me a tour of his shop
and storeroom where MANY Atlas units and parts were contained. He
even showed me (which I photographed) probably the only working Atlas
400X. Bob explained that Herb tried desperately to produce a
reliable low cost SSB transceiver to compete with the Oriental
imports; but, failed due to many extremely frustrating and
complicated situations.

Bob is located in Vista, CA just next door to Oceanside; so, made the
short jump to chat with Mimi Johnson (Herb's widow) and John Bruchey
(former Swan employee who started with Herb in Benson, AZ and
continued on with Cubic, giving him essentially 35 years or more with
the same organization).

All three, Mimi, John & Bob added much to our knowledge of Swan
History as well as allowing me to take possession of quite a bit of
memorabilia. Although mostly Swan related, some Atlas items were
included. For example, I have a full box (1000) of Herb's new
business cards with Atlas logo, never out of the box.

Since no stipulation was given as to how something like this should
be distributed, I presume some Atlas owners might like to have one
for display or such. Nothing we obtained is for sale nor will it be
sold. So, anyone wanting one of these business cards, can send an
SASE to me with a promise it won't show up on Ebay or the like.
You'll then have a card in the return mail. My easiest mailing
address is 609 Partridge Street, Elmira, NY 14904.

If you need to catch Bob Craik for anything Atlas, his home and e-
mail addresses are OK on QRZ.

Stu/K4BOV
| 374|360|2002-10-12 03:44:06|WB6RLG|Re: Atlas210x--> Former Employes of Atlas??|
Interesting stories well my mind will have to work a little but there was one, We shipped allot of Atlas gear to Arab countries to skieks and shakes the rich. Well we received one back for repair stating it just quit working, now think what grows well in desert country??? Roaches , we popped the lid and this thing and it was full of roaches and they took off all over we had to have the entire building exterminated. Women were freaking out. Lesson learned we never opened one up again inside when it came from that climate..
| 375|360|2002-10-12 04:57:24|Ben K8DIT|Re: Atlas210x--> Former Employes of Atlas??|
That is an excellant anecdote! I want to hear more of those kinds of
stories.
What other things went on during those days that have been forgotten, I
wonder?
| 376|376|2002-10-13 00:12:23|John Pavlica|mrf 454s ?|
What component(s) did the MRF 454's replace?

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| 377|377|2002-10-13 16:08:09|Tilman D. Thulesius|Re: Atlas210x--> mrf 454s ?|
John

The PA transistors / Tilman -JZT


John Pavlica wrote:

ADVERTISEMENT

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[Image]

--
Tilman D. Thulesius
Kungsängen / Sweden
tt@...
+46 8 584 50045



[Non-text portions of this message have been removed]
| 378|378|2002-10-24 00:40:31|jan lindstrom|210X repaired , nice quiet receive!|
I picked up this clean 210X at a hamfest in May and of course it wasn't working, recently sent it to Glenn Boodey (the Atlas exper)t and got it back a few days ago. He did a super job!
I have not wired up a mike for it yet but after trying the receiver , I must say I am impressed with how good it is. It wont match my 751A but it for it's era, it is superb. I have a couple of questions if anyone can answer. 1) The location for the NB adjustment on the panel has got a toggle switch only and I have not followed it's wiring yet. Anyone know of a mod that inserted a toggle switch in that position ? 2) Anyone using an EV 600E Hi-Z mike and if so is it good or bad?
Thanks
73 Jan, VE2JL

[Non-text portions of this message have been removed]
| 379|379|2002-10-27 14:15:55|n3bj|CW Filter for 210/210X ?|
Anyone ever rig a CW filter to a 210 or 210X ? Know there are 2
different IFs. Wonder if there are any avaiable CW filters that
coincide with either of these IFs. Understand the IF of the 350XL is
different than the 210/X.
| 380|379|2002-10-27 15:04:28|Uwe Sievers|Re: Atlas210x--> CW Filter for 210/210X ?|
Look for the Drake TR7 Filters.... the IF of the later 210,s should match ..
73 Uwe DJ9XG


| 381|381|2002-11-16 18:41:39|n3bj|210X Serial Number vs. IF|
Does anyone know the serial number break for the change from 5520 to
5645 IF freq. in the 210X and 215X ?
| 382|382|2002-11-17 20:00:21|jt|service help|
Does anyone on the list know of a electronics repairman that is knowlegeable about the Atlas 215 also what is the best way to ship it??I feel reluctant to trust any of the local -repairmen?? Any help will be appreciated--jt
J Thibadeaux
75FJ40-
NH7FJ
From the hill==

[Non-text portions of this message have been removed]
| 383|383|2002-11-18 01:14:47|Ben K8DIT|Re: Atlas210x--> service help|
Hi J. Yes, His name is Glenn Boodey, you can contact him by email at
gcf@... He is THE man to repair your Atlas. He's done two for
me. Double box it using wadded newspaper. It should do fb. Check out the
reviews of the Atlas gear at eham.net. cul Ben K8DIT
| 384|382|2002-11-18 19:55:35|k4bov|Re: service help|
In addition to the fellow that Ben mentioned, Bob Craik, former Atlas
employee, continues to service all models of Atlas. He is located in
Vista, CA and can be e-mailed at: wa6gyg@...

Stu/K4BOV

| 385|385|2002-12-13 03:50:37|vk5ma |transmit problem|
I have restored/repaired a 210x and it works quite well. The only problem is that when the ptt button is pressed the meter flicks up to about 4 amps momentarily. The result is that the receiving station hears a loud click. Does anyone know of a solution to this?

Thanks
Ian VK5MA
N.B.new email address atspl@...
| 386|386|2002-12-13 22:29:10|Douglas|Re: loud clicks|
Have you checked the obvious, such as an intermittent
or scratchy microphone PTT switch?
I had the exact same thing happening and it was simply
the switch.

Barring that, I'd look for some kind of delay in one
of the T/R switching circuits.

Doug/WA1TUT

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| 387|386|2002-12-14 03:38:05|ilyckholm|Re: Atlas210x--> Re: loud clicks|
Thanks for the reply
There is still a problem when using the switch on the front panel. Will lok
at the t/r timing.
Thanks
Ian

At 12:29 PM 13-12-02 -0800, you wrote:



[Non-text portions of this message have been removed]
| 388|388|2003-01-07 22:01:33|John P.|Non-Atlas Question|
Since the Atlas 215X doesn't have 10m, can anyone report how well the Radio
Shack #HTX-10 10meter (mobile) rig works?


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| 389|389|2003-01-08 03:13:04|wb6rlg_bwmrc.com|Re: Atlas210x--> Non-Atlas Question|
HTX-10 works fine but if you can find one the Ranger AR-3500 is a best buy 100 watts has FM Am it fine rig had one for years.. But then you could just by a 210X..

WB6RLG Larry
| 390|388|2003-01-08 15:28:25|ve3pyg@rac.ca|Re: Atlas210x--> Non-Atlas Question|
On 7 Jan 2003, at 12:01, John P. wrote:

It works very well. The cw is an after thought but provided 10 m is
open it can be a lot of fun. For mobile use it has up down on the
mic, but it has no FM so you can not use the repeaters above 29.5


VE3PYG

Dr. David G. Stephenson, VE3PYG,
Merrickville, On. Canada: dstphnsn@....

"Happy the humble state of the scholar who retires from this malicious
world, and in the pleasant countryside, with modest table and board,
governs his life with God alone, and passes his days by himself,
neither envied nor envying." de Leon (under process by the Inquisition)
| 391|391|2003-01-21 06:13:41|rhadley46 |210X Limited Edition for Sale|
I've got a gorgeous 210X Limited Edition, complete with original
manual and an original Atlas color brochure that I'm about ready to
list on e-Bay, but thought I'd post a for-sale here first. Beautiful
shape, as I said, and includes the slide-in portion of the mobile
mount. I don't think it's ever been used mobile though, as it's way
too clean to have seen that kind of use. I've owned it 5 or 6 years,
used it as a spare rig before I got my FT817, and made a few contacts
on it, but I'm primarily a CW op, so I've decided to let it go.
First $250 + shipping gets it.


Rick, W0FG
| 392|391|2003-01-21 21:02:42|rhadley46 |Re: 210X Limited Edition for Sale|
I see that one of my Yahoo e-mail addresses was bouncing, so if you
tried to respond and got a bounce try it again.

73,
Rick
--- In atlas210x-215x@yahoogroups.com, "rhadley46 way
years,
contacts
| 393|393|2003-02-10 07:02:19|chuck hawks |210x Problem, Won't transmit in SSB but will in CW|
I have a 210x that I bought about 8 years ago. I have been using it
for receive since that time and never tried to transmit all this
time. I now have the license to use it for what it was designed for.

I seem to have a problem. The gentleman that I purchased it from
used it to show me that it would tranmit and it did. I have installed
an 75-meter dipole and according to the Antenna Analyzer the SWR at
3.890 (checked with a freq meter in the shack) I have 1.3:1.

When I try to transmit SSB I don't get any indication of ALC on the
meter. Both the ALC and Mic Gain adjustments do nothing. This is both
with using a mic w/PTT and no mic using the TRANS position. No
indication, no output. I put an old Midland SWR meter in line for
indication.

But when I turn the function switch to the CW position and adjust
the Mic Gain I get an indication on the meter of about 8. The ALC
does nothing visible. I have the Midland SWR meter in line and I get
an indication of power out.

What am I doing wrong? Or what should I look for to fix it.

I have a copy of the manual and schematics for the rig. I have a
meter, a borrowd 10MHZ 'scope and I can borrow a wattmeter and dummy
load.

Thanks in advance.

73,
Chuck
KE4ETH/AE
West Tennessee
| 394|394|2003-02-10 07:31:47|Ben K8DIT|Re: Atlas210x--> 210x Problem, Won't transmit in SSB but will in CW|
Chuck, Congratulations on becoming a ham radio operator. The problem with
what you've been dealing with is that there could be a few things going on.
Is the mic working? You need to whistle softly into it for affect, but
you've probably thought of that.
How much power output do you get on cw? The radio is fairly simple to
operate but very challenging to work on. Atlases have been much misaligned
by having their innards tweaked by well meaning but uninformed technicians.
Tricky even for alot of professionals.
The deal with the Atlas Brand Radio is that is was the first solid state
xcvr on the market. As a result some of the transistors were prone to
failure and have since been discontinued and their replacements have been
renumbered or are not replaceable. Substitutions can be found most of the
time. The good news is that if there is a failure, its repalacement is much
more robust.
A ham tech with a history and knowledge of the Atlas line would be the ideal
way to get yours back to running as new. I recommend Glenn K8EYU whose email
is gcf@... has repaired a number of my Atlases and have been very
happy with the results. He resides in Washington state. He will have you
ship it to him for an estimate and inform you by either telephone or email
what the repairs will cost. Let him know what and how you want to proceed.
If you have doubts about the mic, for example, ship the mic with the rig.
| 395|393|2003-02-10 08:13:24|ian|Re: Atlas210x--> 210x Problem, Won't transmit in SSB but will in CW|
G'day Chuck
If the unit seems to work on cw you can narrow it down quite
considerably. First of all set the ALC control to 12o'clock. There is no
indication as such of ALC onset. The meter will only indicate pa current
during transmit. If the meter isn't indicating current with mic gain wound
up considerably then check the microphone .
If that's ok then I would take the covers off including the bottom one to
gain access to the wiring. I would put the oscilloscope on the mic input
point and determine if there is any signal when speaking into the mic. The
mic amps are on the PC-200C board. I had a similar problem to yours
although I had power it was only a few watts with mic gain on full. It
turned out to be something as simple as IF tuning on the PC-120 board. You
should be able to follw the path of the tx audio to try and determine loss
of signal.
Best of luck.
Ian Lyckholm VK5MA
Adelaide South Australia

At 05:02 AM 10/02/2003 +0000, you wrote:



----------


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| 396|393|2003-02-10 19:12:21|chuck hawks |Re: 210x Problem, Won't transmit in SSB but will in CW|
Now for the really dumb question. The mic that I have been using
for testing is a low impedence mic. In going over past messages it
mentions that the radio needs a high impedence mic. I think that may
be the problem.

Thanks for the answersand if that is the problem I will get a
different mic to try. If that doesn't solve it I will start looking
at the amp section.

As an aside, I have been licensed for about 10 years as a No Code
Tech. and just upgraded to Extra Saturday. I was given code credit
for having had a Novice license about 28 years ago. I was WN3UTR and
WN9OFB.

Thanks again.

Chuck
KE4ETH


--- In atlas210x-215x@yahoogroups.com, "chuck hawks
installed
the
both
get
dummy
| 397|397|2003-02-11 15:26:38|oh2ev@sral.fi|Re: Atlas210x--> Re: 210x Problem, Won't transmit in SSB but will i|
The low impedance mic certainly afftects even if there might be other
reasons. I have a Shure 404 C low impedance mic which doesn't work with
my Atlas without a separate mic amp which I made. Shure 404 B is high
imp and would do fine without separate amp (as any 30k-50k mic).

de Esa, OH2EV

-----Original Message-----
From: chuck.hawks [mailto:chuck_hawks@...]
Sent: 10. helmikuuta 2003 19:11
To: atlas210x-215x
Subject: Atlas210x-- will in CW

Now for the really dumb question. The mic that I have been using

for testing is a low impedence mic. In going over past messages it

mentions that the radio needs a high impedence mic. I think that
may
be the problem.

Thanks for the answersand if that is the problem I will get a
different mic to try. If that doesn't solve it I will start
looking
at the amp section.

As an aside, I have been licensed for about 10 years as a No Code
Tech. and just upgraded to Extra Saturday. I was given code credit

for having had a Novice license about 28 years ago. I was WN3UTR
and
WN9OFB.

Thanks again.

Chuck
KE4ETH


--- In atlas210x-215x@yahoogroups.com, "chuck hawks
it
for.
from
installed
at
on
the
both
for
adjust
ALC
get
a
dummy
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| 398|397|2003-02-11 15:52:45|chuck hawks |Atlas210x--> Re: 210x Problem, Won't transmit in SSB but will in CW|
Thank you. I am sure that I can borrow a high impedence mic to try.
If that doesn't fix it, I'll tear into the radio. I would like to get
it working as it would make a good rig for home and travel. I have a
Tempo One I am restoreing and want to use that one as a backup.

Thanks

Chuck
KE4ETH


| 399|397|2003-02-12 03:48:14|wb6rlg_bwmrc.com|Re: Atlas210x--> Re: 210x Problem, Won't transmit in SSB but will i|
Interesting the 404 -C was the recommended mic for the Atlas I shipped allot of them with the rigs when I was with Atlas.. Who knows although I have a 404-C that wont work with my 210-X It is a 5 wire I bought anew one and it works fine. Oh well electronics who knows..
WB6RLG Larry
| 400|397|2003-02-12 08:31:53|oh2ev@sral.fi|Re: Atlas210x--> Re: 210x Problem, Won't transmit in SSB but will i|
Yes, this sounds interesting. My 404-C might also be shipped originally
with the rig and still won't work without extra amp, at least when
connected right to the back of the rig. I also have the Atlas console
which I haven't yet modified to local voltages. Could it be so that
404-C works when it is connected through the console? Have to check what
kind of amp is in the console's VOX circuitry. I also tried Kenwood's
dynamic low imp hand mic with Atlas and it didn't work. With this small
amp I made and 404-C it works very fine.

Esa, OH2EV

-----Original Message-----
From: wb6rlg [mailto:wb6rlg@...]
Sent: 12. helmikuuta 2003 3:44
To: atlas210x-215x
Cc: wb6rlg
Subject: Re: Atlas210x-- but will in CW

Interesting the 404 -C was the recommended mic for the Atlas I
shipped allot of them with the rigs when I was with Atlas.. Who
knows although I have a 404-C that wont work with my 210-X It is a
5 wire I bought anew one and it works fine. Oh well electronics
who knows..
WB6RLG Larry
| 401|401|2003-02-12 16:12:20|John P.|600 board / 300 board on 210X|
Fellow Amateurs:
Anybody worked on the PC600 board in an Atlas 210X? Do the crystals ever go
bad, or is it more likely the transistors? Use of ECG/NTE replacement
transistors OK?

Also on the 300 board, I have replaced all of the FET's used for 'switching',
yet still no reception. Any ideas?

John


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| 402|401|2003-02-12 16:22:39|Marc|Re: Atlas210x--> 600 board / 300 board on 210X|
crystals do go bad. I have a 210 with a bad opp. xtal.

NTE or EGG are OK as well.

Marc WR2I
The Radio Clinic of NYC
High Performance radio sales/service
--- "John P." <toledohamradio@... __________________________________________________
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| 403|403|2003-02-12 16:32:40|Douglas|Vox schematic|
Does anyone on here have a schematic for the optional
VOX/CW sidetone unit as used in the Atlas 210 series
power supply console?

Mine has been modified with some chopped wiring. I may
be able to trace out the original wiring and functions
but it won't be easy.

tnx,

Doug/WA1TUT



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| 404|403|2003-02-12 16:45:27|Marc|Re: Atlas210x--> Vox schematic|
Hi Doug,

I didn't know you were into Atlas. I may have it and I
will have to look. No more cubics for now?
--- Douglas <sparks06524@... __________________________________________________
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| 405|403|2003-02-13 16:29:25|Douglas|Re: Vox schematic|
Thanks Marc,
If you do have that schematic, I'd appreciate it.
I suspect that it was supplied as a single sheet with
that VOX unit.
It's not a part of the 210 manual or the CS220's
manual.

Yep, I still have several Swan/Cubic rigs plus a
couple of 210X's and two 350XL's.
I like them all....

Doug/WA1TUT



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| 406|403|2003-02-13 16:34:20|Marc|Re: Atlas210x--> Re: Vox schematic|
I looked and did not find. Would it help if we were to
get on the phone with mine opened so we can say this
goes here that goes there?
--- Douglas <sparks06524@... __________________________________________________
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| 407|407|2003-02-18 23:24:33|beamshoot |Strong signal problem|
Hi to all !!
Any one has doid experience whit this kind of matter??
My atlas210x has a big problem of saturation on strong signal; i
think some one have solved with complete change of PC100.
The noise blanker, expecially on 40 meter work like an noise
amplifier; problem also with input mike gain.

Thank's for the attenntion and 73 to everybody.
Emy
| 408|407|2003-02-18 23:58:27|Uwe Sievers|Re: Atlas210x--> Strong signal problem|
Hi Emy,
I have made 2 version of a new PC100 board... both diagrams are in the files section,
but the reason wasn,t an overload problem it was donr to improve the totel figures on
reception better noise figures and more sensivity on the higher bands.... if you have
an overload problem by strong rf signals you should try to find out what the problem
is... install a pot in series to the antenna on reception and reduce the rf..
I think you may have a problem with the agc circuit on the PC300 board... I had several
problems with the CA3086 on it.. try 1st du replace it (I know it,s not so easy because
you have to unsolder 14 pins of the circuit).. then install a DIP socket and a new
CA3086 and look hat happens..
good luck
Uwe DJ9XG

| 409|407|2003-02-19 19:13:08|Kevin Murphy|Strong signal problem|
Hi all.
Technically the AGC on the 210x and its variants has a range of 60-70
dB via the MC1350 IC amp only. Overloading could possibly be severe
when the MC1350's range is exceeded.
Note that the MC1350 is used in the Elecraft K2 for a similar function,
however a xtal filter follows it so the more severe products are
filtered.
I have played a little with adding a pair of PIN attenuator diodes
across the primary of the output transformer of the MC1350. The centre
of the diodes (cathode) basically would lead to a very small circuit
(only about 6 components)activated by AGC. I only got to the point of
trying the diodes across the transformer.
If anyone is interested in furthering this idea let me know and I will
pass the schematic/idea on or post it on the site if there is
sufficient interest. (Its untried as yet but the diodes did work rather
well)

Kevin
ZL1UJG

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| 410|407|2003-02-20 22:49:00|hillerber
Hi Kevin,
with the pin diodes that ´s a very interesting thing. I would really
appreciaty if you would make your results available to the group.
Presently I am working on some mods on the 210x including the agc and
are very keen on new ideas ...
Later I will report on results.

Vy 73
Bernd
DK9EV



In atlas210x-215x@yahoogroups.com, Kevin Murphy 60-70
function,
centre
circuit
of
will
rather
mobile phone.
| 411|411|2003-02-21 07:36:01|zl1ujg |PIN diode circuit|
Hi all,
There is a new PDF relating to the PIN diode circuit as discussed in
this group. There is also some other comments relating to the AGC.
Please contact me for further information.

Kevin
ZL1UJG
| 412|412|2003-02-21 13:46:24|peter oesterle|Re: Atlas210x--> PIN diode circuit|
Hi Kevin I am certainly interested in the mods for the atlas. Pete
Ve3hoh/w3






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| 413|413|2003-02-21 14:03:20|Jim Potts |DFM for 210X ?|
Hi guys I'm very new around here but have owned a 210x for over 20
years. Just looking at the pix pages I noticed a 210x with a digital
readout ??
Also being in Australia one doesn't find many Atlas radios around,
even for bits, so renovating the old girl has become quite a job.

73's
Jim VK4BBG
| 414|414|2003-02-21 21:25:03|John P.|Digital Frequency Readout|
Hello J.P. in OZ:

Atlas made a stand-alone digital frequency readout with a switch to pick the
higher or lower bands for display.

Also, there are a few (some on the list) which offer a digital readout that you
can add to the 210/210X/215/215X.

73's
John


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| 415|415|2003-02-22 00:16:53|Jim|Re: Atlas210x--> Digital Frequency Readout|
Hi John. Many thanks for the info. I'd be interested in hearing from anyone on the list who can supply such a beastie.
Cheers
Jim
| 416|416|2003-02-22 21:34:04|Stuart Liss|Re: Atlas Digital display|
Hi Jim,

Rudy King in Miami, FL installed a digital display in my Atlas 210X replacing
the analog dial and it works great. His email address is: rudyking@...
I am able to tune/transmit across the whole 10m band.

Stuart
liss@...



| 417|417|2003-02-23 13:57:12|Jim Potts |Low drive|
I have a problem withlow drive levels in the Atlas 210x I'm
restoring. Rx appears ok but tx almost zilch. Looked at pc100 and
pc200 but without given levels I have no idea. Just from curiosity I
temp bypassed the xtal filter. Woah babee. Drive came right up,
checked on gc rx and there she was.
This suggests to me that pc200 is looking for lots more drive from
pc100 via the filter. Crook pc100 board or filter. I've no idea what
levels should be going into or out of the filter on tx.
The filter appears to be ok on rx so I'm suspecting the pc100. But
can one actually check the filter easily ?
Cheers
Jim
| 418|418|2003-02-23 15:46:44|Jim|Re: Atlas210x--> Low drive|
Ahh...found it I think. The carrier oscillator was slightly off. Amazing how a post will suddenly clarify things :)
Jim
| 419|419|2003-02-28 21:11:06|beamshoot |Atlas210X more and other's|
Hi all!!

Very hard to replace a full Atlas 210x power all band's.
First off all those trimmer located in PC 900C for my personnel
opinion
and after test, all they must be changed to ceramic type; are much
more
stable.
Other, in power instability, are carrier oscillator mismatch ( 5,520
Mhz
first edition and 5,645 last one) plus band rotator that must be
very well cleaned.
On one of my Atlas 210x i have found a correct reception on 28Mhz but
on TX is going on 17,000 Mhz.
Suspected matter on the PC300C board where are the Fet Oscillator
switch.
On this band we have not the plus (+) operation betwen IF,VFO but (-)
difference.
Any way later on i will post the solution.
If any one haved this experience with similar mine on 28 Mhz.
band, let know please.
Last two are for RFGain and AGC; fix a new trimmer for 4k7 just
attached to the
pot. In this condition it will be nore easy to correct the qrm and
strong signal.
Locate PC300C Q301B on pin 8 ( R=1K); take out R=2K2 to ground and
fix
a trimmer 4k7.
Attack AGC will much betterM dipending on your preference (SSB or CW).
Interesting is to change the costant as doid in KWM2A Collins.

Thank's to all and 73.
Emy I2QEN
| 420|420|2003-03-02 00:19:02|John P.|FET switching transistors on PC300C board|
Suspected matter on the PC300C board where are the Fet Oscillator
switch.
On this band we have not the plus (+) operation betwen IF,VFO but (-)
difference.

I replaced all of the FETs in my 'dead' 210X, and I'm still not hearing
anything on receive other than 'hiss'. Anybody else care to comment?
Can it be replaced with a relay just as easily?

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| 421|421|2003-03-02 00:47:01|Jim|Re: Atlas210x--> FET switching transistors on PC300C board|
Where are you seeing the difference frequency ? I assume that you've checked the frequency of the VFO and the carrier oscillator ? My carrier oscillator was out and that gave me some wired frequencies also until I realized that I had the later IF filter.
Cheers
Jim VK4BBG
| 422|422|2003-03-03 09:48:43|Douglas|Atlas 210 repairs|
I've lately seen several messages on this newsgroup
discussing Atlas 210 repairs.

Some folks seem to be trying to repair these rigs by
seemingly random parts replacements or, as it's
sometimes called, "shotgunning" it.

As a tech with over 35 years experience, I rarely
replace a part unless I've first PROVED that it is
causing a problem. Of course, there are always
exceptions, such as a doubtful I.C., etc.

These rigs are fairly simple units, compared to the
latest rigs with digital technology.
Nevertheless, they can only be repaired, without a lot
of wasted effort by using basic test equipment and
knowing basic troubleshooting techniques.

An oscilloscope and a frequency counter is a must. If
you don't have them, beg, borrow or otherwise get
them.

With them a "dead" rig can be troubleshot in as little
as a half hour. Simply by using the rig's crystal
calibrator as a signal source, watch the signal
waveform thru each stage on your 'scope. A non working
stage is readily apparent.

Doug/WA1TUT

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| 423|423|2003-03-03 22:31:58|Jim|Re: Atlas210x--> Atlas 210 repairs|
On the whole I'd tend to agree with you. However logical faultfinding often requires not only the correct procedures and the correct equipment but also a circuit. Even this may not be enough if the manufacturer doesn't include major revisions e.g. different If frequencies and a level flowchart.
Whether it's an Atlas or the latest digital stuff, faultfinding processes are basically similar.
There is, however, a mindset difference between doing it for a living and fixing the old girl up a bit when you have the time. Hams have always been "fiddlers" to some extent, and I guess that we shouldn't be surprised if we sometimes stuff it up rather than fix it up. That's why it's called "amateur" radio :))

Jim VK4BBG
| 424|424|2003-03-04 19:47:02|em57@iol.it|Re:Atlas210x--> Atlas 210 repairs|
I'm sorry Om, but personnaly i am electronic high degree engineer with 30 years of experience in telecom and i know and haved a best of instrument's on market.
Now i am not in according with you when you write that some peoples doing azzardous mod in particulary for Atlas radio.
The ham is not only cq 20 meter and listing.
Every body can do exsperience where is possible to do.
Any kind of mod is free to do but one thing is important to say; in this group all the people have a little o more of experience in radio and any possible mod is tested.

Thank's for your kindly attention.

73 de I2QEN, Emil


---------- Initial Header -----------

From : Douglas <sparks06524@... To : atlas210x-215x@yahoogroups.com
Cc :
Date : Sun, 2 Mar 2003 23:48:42 -0800 (PST)
Subject : Atlas210x--| 425|425|2003-03-13 14:26:31|Peter Dalton|Receiver input tuning BPF's|
Hi all,

I have a 210x which is has poor RX sensitivity on 20m only.

I have noted that the RX signal level, eg; when tuned to the cal signal,
on the 20m band is very sensitive to the antenna terminating impedance
which is not so with the other bands. When I tune on 80, 40 and 15m to
the cal signal and then attach the dummy load to the antenna socket the
S meter level drops by less than one S unit, when I do the same thing on
20m the S meter level drops by almost 3 S units. Again if I attach a
long wire antenna (Hi Z) when on 20m the RX performance is about as good
as on the other bands however, when I use a low impedance (50/75 ohm)
antenna ( which is a known good match on 80, 40 and 20m) to the antenna
socket the performance on 20m is well down on the other bands.

I suspect the RX input impedance on 20m is not 50 ohms and that the RX
input circuit is faulty on the 20m band, I don't think it's the tuning
as the filter tunes on 20m, it's probably a bad connection or open cct
in the 20m filter cct

My question then: Has anyone found a good way to remove and/or get to
the RX input tuning filters so they can be checked. It looks to me that
I will have to disassemble most of the radio to get this part of the
circuit out so that I can test it.

Any ideas on this problem.

By the way 20m is the band that has two traps in series with the band
pass filter and one of these traps is not mounted on the filter circuit
boards but on a piece of tag strip down (where it is very difficult to
get to) under the filter boards next to the band switch, Murphy's Law
would suggest to me that if there is a problem it's bound to be with
this trap which is probably the most difficult part of the circuit to
get to, but then I may just be overly pessimistic.

I also thought that the VFO output (1st MXR injection) voltage is
probably OK since the VFO frequency is at it's lowest on the 20m band
and if injection level was an issue it would have effected the other
bands using the higher injection frequencies, as it is 15m is performing
OK (much better that 20m).

Regards,

Peter

VK1XP
| 426|426|2003-03-13 14:33:17|Jim|Re: Atlas210x--> Receiver input tuning BPF's|
Hi Peter, my goodness. There actually are some other VK's out there with Atlas 210's ! I'm in the process of restoring mine at the moment.
Cheers
Jim VK4BBG
| 427|427|2003-03-13 22:00:17|John P.|Traps?|
Please look at the 'service notes' available on a website, as I believe some of
the traps in these Atlas' were added "after the fact" to the 210 & 215 radios
(for the X version)?

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| 428|428|2003-03-13 22:22:35|Richter, Mike W|VK's|
And I've had my 210X since 1974

Mike VK2BMM

-----Original Message-----
From: atlas210x-215x@yahoogroups.com
[mailto:atlas210x-215x@yahoogroups.com]
Sent: Friday, 14 March 2003 06:41 am
To: atlas210x-215x@yahoogroups.com
Subject: Atlas210x--
Message: 2
Date: Thu, 13 Mar 2003 22:30:23 +1000
From: "Jim" <jimshire@... Subject: Re: Receiver input tuning BPF's

Hi Peter, my goodness. There actually are some other VK's out there with Atlas 210's ! I'm in the process of restoring mine at the moment.
Cheers
Jim VK4BBG
| 429|429|2003-03-14 20:12:58|jt|traps|
John P--You referred to "a website" for service notesfor info on traps for 215-on the Atlas Yahoogroup---what website is that ??--I think im getteing into this in the middle of a thread---any assistance will be appreciated--John T.
J Thibadeaux
75FJ40-
NH7FJ
From the hill==
J Thibadeaux
75FJ40-
NH7FJ
From the hill==

[Non-text portions of this message have been removed]
| 430|430|2003-03-19 09:03:01|mrkafel|S-meter does not read|
I've recently acquired a 210x. It looks like it's been modified
quite a bit internally. When receiving the S-meter registers
nothing. I can hear strong and weak audio signals, but the meter
just won't register anything.

I've tried to zero the meter per the manual instructions. The meter
is zero'd alright, but just won't respond. I've also noticed that
the meter will only register 5-6 amps output on SSB with the mike
gain set on maximum. That's with me talking very loudly into the mic
at a very close range. I'm using a Shure 450 Series II desk mic with
a high impedance setting.

Any suggestions?
| 431|431|2003-03-28 16:29:55|LORNE GUSTAFSON|Will 210X be damaged if turned on after 20 years? Microphones?|
I bought my 210X and a Drake TR-4C in 1974. I haven't turned either
one on in over 20 years.

I've been told that the Drake may be damaged if I don't bring power
up slowly with a Variac. Is that also true of the Atlas?

Also, does anyone know if the newer mikes & headphones would work
with the Atlas? I have a Heil Traveler headset and Heil Goldline
mike as well as the D104 mike and Shure hand mike that I used in 1974.

Waiting for some wisdom from those who know.

Thanks,
Lorne Gustafson, K8KQD
Eustis, FL
| 432|432|2003-03-28 17:30:33|Ben K8DIT|Re: Atlas210x--> Will 210X be damaged if turned on after 20 years? |
Lorne, Welcome. Your power supply filter caps may be dried out, maybe not.
Short duration on time, like 30 seconds, and feel the caps surface, if it is
warm or hot, its time to change it.
If it stays cool, or room temp., chances are there's life left in it and it
wont fail. The variac mystique of bringing back caps from the dead has had
alot of play from the urban legend department, but you'll hear all sorts of
voodoo from the leagues of boatanchor afficionados. The variac scheme does
however work on some caps, but will not bring back a cap that has failed.
Feeling the heat from the side of the cap's surface will tell you whether
this component has much life left. Ive started up some pretty narly old gear
with this technique and when the cap is warm after only a short period of
being on, is telltale. If it stays cool/ not hot then try to put a load on
it and try again. With use, some caps seem to revive and replacement will be
further down the road. So dont sweat the small stuff and enjoy your new/old
gear. If you dont have the necessary bench gear/skills, find someone who
does. Either the shure 444 or the d104 will work fb, your mileage may vary
with the other mics you mentioned.
| 433|433|2003-04-02 19:23:26|Mark Hill|Hi folks!|
Greetings from the UK!

I had a nice Atlas 215-x back in the late '70s that was stolen from my
car. If anybody sees serial number TP11047 , late model with 5645 IF and
great big ferrites in the PA (for extra power on 160), please let me know!

I saw another 215-x for sale last year and went all nostalgic. So I am
once again the proud owner of a 215-x, with 5520 IF this time, serial TJ3782.

How about someone construct a database of who has what?

My friend Dave has a good Atlas web site at
http://www.davepick.btinternet.co.uk/atlas/index.htm

Anyone out there done a PIC-based (or why?) huff and puff stabiliser for
the Atlas? I have a KA3J UniCounter (QST design) hung off the external VFO
socket on mine. Allows me to measure the drift exactly!

KISS

Regards.

Mark.

*********************************************
Mark Hill - G4FPH
E-mail: g4fph@...
Radio web site: www.g4fph.freeserve.co.uk

Aerials resonant on 1930/5300/7040 kHz
Send more electrolytics!
*********************************************
| 434|433|2003-04-02 20:01:52|beckenro|Re: Hi folks!|
Hi Mark, I am new to this group and just procurred a 210X with the
power supply/speaker/vox/cw module. I've been inactive on the radio
for many years and decided it was time to give it a go again. Can't
put up much of an antenna where we live so I have built a coaxial
diplole and tried to hide it as much as possible. I am still awaiting
the arrival of the 210X and hopefully it will work out well for me.

Thanks for the info on your friend Dave's Atlas website; I will check
it out later this morning.

Regards,

Bill, Spring, TX W5SG
| 435|433|2003-04-03 10:31:10|g4fsu|Re: Hi folks!|
Hi Mark,

Good to hear from another UK Atlas user! I still operate my 215X
Limited Edition on top band & 80m. It's the only high power rig I
have & still gets regular use. It's an early 80s model as far as I
can tell.

The biggest problems I have are the VFO drift and dial slip. Drifting
seems to be a family feature of the Atlas rigs! I solve it by
switching the rig on several hours before I need to use it. I tried
to restring the dial without much success so would be interested to
know if anyone has had a similar problem & found a fix.

There's a picture (not very good!) of my rig & shack at
www.wells-somerset.biz/25840/28135.html if interested.

73 Ian G4FSU

| 436|433|2003-04-03 14:38:27|Mark Hill|Re: Atlas210x--> Re: Hi folks!|
G4FSU de G4FPH,

Thanks for the reply Ian.

I checked out the picture of your shack. Most FB. I have one of mine at
www.g4fph.freeserve.co.uk. Not quite as FB!

I like the look of the limited edition Atlas. Let me know if you ever
decide to dispose of it - I think I should have one to in my collection!

Glad that you get on 160. I have a regular net on Sunday nights at 21:00
UK local time. If you fancy an Atlas to Atlas QSO we could try for 20:30
this coming Sunday on 1942 kHz. Let me know soon though because I shall
need to warm mine up too!

Regards.

Mark.


*********************************************
Mark Hill - G4FPH
E-mail: g4fph@...
Radio web site: www.g4fph.freeserve.co.uk

Aerials resonant on 1930/5300/7040 kHz
Send more electrolytics!
*********************************************
| 437|437|2003-04-03 14:40:11|Mark Hill|Atlas web site|
Folks,

You may already have seen this site. Does anyone on the group actually own
an Atlas 400?

http://www.w6trw.com/radio_history/atlas_radio_history_part_1.htm

Regards.

Mark.

*********************************************
Mark Hill - G4FPH
E-mail: g4fph@...
Radio web site: www.g4fph.freeserve.co.uk

Aerials resonant on 1930/5300/7040 kHz
Send more electrolytics!
*********************************************
| 438|438|2003-04-04 04:22:57|Jim|Re: Atlas210x--> Atlas web site|
Better still, does anyone have one for sale ? :))))

Cheers
Jim VK4BBG
| 439|438|2003-04-04 05:17:22|Marc|Re: Atlas210x--> Atlas web site|
They were never produced.....there was a semi-working
prototype, but that's it.

Marc WR2I
--- Jim <jimshire@... http://www.w6trw.com/radio_history/atlas_radio_history_part_1.htm
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| 440|438|2003-04-04 05:25:34|Jim|Re: Atlas210x--> Atlas web site|
Blast, I'll just have to keep an eye out for one of the super dupa 350's? then. I'm almost finished restoring a 210x and have a 215 coming to keep me off the streets.
| 441|438|2003-04-04 05:34:17|Jim|Re: Atlas210x--> Atlas web site|
Speaking of which, does anyone know of a circuit or kit that can arrest any frequency drift in the 210/215 vfo ? I've seen some stuff somewhere but can't remember where.
Cheers
Jim
| 442|438|2003-04-04 05:36:07|Marc|Re: Atlas210x--> A.tlas web site|
I have a beater 210x I finished a few weeks ago. The
reports I am getting are "it is the best 210x have
ever heard". I have a 210 (not "X") vintage 1975
restore back on the bench after being boxed for 4
years after giving up. The rx is hot but 10 meters is
deaf and dumb. Just pulled the PA off for an
inspection of the LPF. Replaced the driver and OP XFMR
today. Waiting for PA final xstrs. I have been a busy
boy this eve.

Regards,

Marc WR2I
--- Jim <jimshire@... http://www.w6trw.com/radio_history/atlas_radio_history_part_1.htm
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| 443|438|2003-04-04 05:37:09|Marc|Re: Atlas210x--> Atlas web site|
http://members.iinet.net.au/~richardh/vfostab.htm
--- Jim <jimshire@... http://www.w6trw.com/radio_history/atlas_radio_history_part_1.htm
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| 444|438|2003-04-04 05:43:04|Jim|Re: Atlas210x--> A.tlas web site|
Marc, you had to replace the o/p transformer ? Thats the torroid on the finals ? Sounds like you have been very busy indeed. Do you know of a source of relays for the one on the pc100 board ? I have one that has a mind of its own! Also I'm still getting some carrier bleedthrough in the output, guess I'll have to replace the diodes on the same board.
It's been a long frustrating experience for me as I hadn't touched a soldering iron in anger in 30 years but now feel that I've done good :))

Cheers
Jim
| 445|438|2003-04-04 05:44:04|Jim|Re: Atlas210x--> Atlas web site|
Thank you.
Jim
| 446|438|2003-04-04 05:55:11|Marc|Re: Atlas210x--> A.tlas web site|
I replaced the OP XFMR ferrite cores with some honkin
ones I pulled from a scrapped MRI 5KW combiner board.
I removed the small beads from the 210 xfmr (six small
beads per side)and put one large ferrite on each side.
I flipped the thing upside down to avoid shorting. I
made the connections to the PCB with some braid (low
inductance). This is to increase the frequency
response of the PA at the lower freqs. The VERY early
PA's have these little beads and suck at 80 meters.

I replaced the relay on the PC-100 with a standard
4PDT ice cube type in the blank spot above the
original relay. I drilled holes in the PCB and
hardwired the relay to the original location.
Naturally, I used 3 of the 4 poles.
--- Jim <jimshire@... http://www.w6trw.com/radio_history/atlas_radio_history_part_1.htm
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| 447|447|2003-04-04 14:20:43|Jim|Modern Drivers and Finals ?|
Can anyone recommend modern replacements for the transisors in the PA module please? Drivers and finals.
Cheers
Jim



[Non-text portions of this message have been removed]
| 448|447|2003-04-04 14:30:53|Mark Hill|Re: Atlas210x--> Modern Drivers and Finals ?|
Jim,

Checkout my friend Dave, G3YXM's web site at:

http://www.davepick.btinternet.co.uk/atlas/mods.htm

Finding a suitable replacement for that funny little driver transistor
seems to be a problem. Any suggestions out there?

Regards.

Mark.

--------------------------------------------------
At 22:20 04/04/2003 +1000, you wrote:
*********************************************
Mark Hill - G4FPH
E-mail: g4fph@...
Radio web site: www.g4fph.freeserve.co.uk

Aerials resonant on 1930/5300/7040 kHz
Send more electrolytics!
*********************************************
| 449|447|2003-04-04 14:47:18|Jim|Re: Atlas210x--> Modern Drivers and Finals ?|
Many thanks Mark
| 450|447|2003-04-04 14:52:15|Marc|Re: Atlas210x--> Modern Drivers and Finals ?|
Not a problem at all. It depends on what finals you
intend to drive. I modified the PCB on my early 210
and have a 2SC2075 in place of the RCA device. I don't
have the finals yet and will see if I get sufficient
drive from the 2075. If I do not, I will install a
2SC1969 and employ negative feedback should the gain
be too high for the devices I am getting. The finals I
am getting areold RCA SK9603's. They are supposedly a
drop in for the CD2545 as are the NTE317. If I did not
have the old part available, my research indicates the
Toshiba 2SC2290 to be the best sub for the original
part in the final. Negative feedback is a good idea
for any new designs. Atlas was into broadband PA
designs in the infancy stages and did not employ
feedeback.

Marc WR2I
--- Mark Hill <g4fph@... __________________________________________________
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| 451|447|2003-04-04 15:45:34|Mark Hill|Re: Atlas210x--> Modern Drivers and Finals ?|
Marc,

Thanks for the info on driver transistors.

I used 2SC2290 in my previous Atlas 215-x. They were fine: 100W+ on the
low bands, as I recall.

Negative feedback around the final would be a good idea as would gain
re-distribution down the entire length of the PAbox! A friend of mine
added an extra +10dB stage inside the box on the end of the TX filters and
was then able to turn down the gain in the 50dB box! The Atlas mod to
re-route the input coax to the PA is a good one too, although I have not
yet done mine. Sleeping dogs and all that.

Keep the faith!

Regards.

Mark.

--------------------------------------
At 04:52 04/04/2003 -0800, you wrote:
*********************************************
Mark Hill - G4FPH
E-mail: g4fph@...
Radio web site: www.g4fph.freeserve.co.uk

Aerials resonant on 1930/5300/7040 kHz
Send more electrolytics!
*********************************************
| 452|447|2003-04-04 15:48:04|Jim|Re: Atlas210x--> Modern Drivers and Finals ?|
Is variation in drive between bands a common problem?
Jim
| 453|447|2003-04-04 16:11:28|Marc|Re: Atlas210x--> Modern Drivers and Finals ?|
yes due to several circumstances. The most pertinent
is that RF transistors typically have gain
characteristics that diminish as your frequency
increases.
--- Jim <jimshire@... __________________________________________________
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| 454|447|2003-04-04 16:14:17|Jim|Re: Atlas210x--> Modern Drivers and Finals ?|
So one would expect a fairly noticeable variation in output voltage from the VFO which did not necessarily decrease with increasing frequency ?
| 455|447|2003-04-04 17:03:36|Marc|Re: Atlas210x--> Modern Drivers and Finals ?|
We are talking about power amplifier design using
bipolar rf power devices. Oscillators can run flat.
--- Jim <jimshire@... __________________________________________________
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| 456|447|2003-04-04 17:16:25|Jim|Re: Atlas210x--> Modern Drivers and Finals ?|
I should of phrased my question a little differently, I apologise. In the event it's not the actual vfo although there is some variation between bands. The rather large variation is in the RF output of PC200. Wierd, there's less RF output at lower frequencies.
| 457|447|2003-04-04 17:34:02|Marc|Re: Atlas210x--> Modern Drivers and Finals ?|
Jim,

We are now onto another topic completely. It seems
you are having a problem unrelated to the PA. I have
just been testing two PC-200's this morning. One is an
A, the other a B. I am having a problem with one of
my 210's being low on TX drive and RX sens on 10
meters only. There is some regulation from a 10V zener
on the later board. I will need to spend some more
time on that change and why it was done. It seems that
my RX problem is not on the 200 and I am not sure what
it is. I have swapped out every board with known
working ones from my 210x, bypassed the LPF T/R relay
and RX filters by inserting my sig gen at the RX input
on PC-100. Same stuff. This one has me scratching my
head now.

What version PC-200 is yours?
--- Jim <jimshire@... __________________________________________________
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| 458|458|2003-04-04 17:49:17|Jim|Re: Atlas210x--> PC200 problems ?|
Marc, my 200 board is designated D. I am having problems with variations in output between bands as well as lack of output from the PA stage. The variations I have tracked down to PC200 but I'll fix it before worrying about output from the finals/changing transistors etc.
Your lack of sens on 10mx is interesting. I assume you have checked VFO o/p with a counter as well as a VTVM/scope ?
| 459|458|2003-04-04 18:05:11|Marc|Re: Atlas210x--> PC200 problems ?|
JIm,

I believe I did check the output of the VFO but I
don't recall what the result was. I am going to check
it again as soon as I get back to the bench. I guess I
am spoiled as I will check the output level on my
spectrum analyzer. Well....I fix radios for a living,
so I have the good stuff.

Marc WR2I
The Radio Clinic of NYC
--- Jim <jimshire@... __________________________________________________
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| 460|433|2003-04-04 21:09:14|g4fsu|Atlas210x--> Re: Hi folks!|
Hi Mark,

OK - we'll give it a try. I'm usually on 1875kHz on Fr. evenings but
have had antenna problems lately (neighbours!), so my top band
signal isn't what it used to be. I'll try & make 1942kHz this Su. -
depends a bit on the XYL & harmonics, so don't wait!

73 Ian G4FSU

| 461|458|2003-04-05 01:48:06|Jim|Re: Atlas210x--> PC200 problems ?|
Marc, I used to fix radios for a living but that was a long time ago. Now I'm back to where I started, playing with them. A Spec Analyzer would be nice but I'd have to fix a lot of radios to pay for it :)). Good luck with the fault chasing, had another thought while I was sleeping. Did you swap boards one at a time ? Maybe there's a problem in more than 1 board ?? Unlikely I know but worth a last shot if snookered.
Jim
| 462|458|2003-04-05 02:40:49|Marc|Re: Atlas210x--> PC200 problems ?|
Jim,

I nailed it a few hours ago. I had a problem with the
DD-6 only on 10 meters and only on this radio. Oddly,
the display in my 206 VFO worked fine with it. So I
thought I would play a bit with the VFO output, so I
did some filtering. That cleaned up the display on
10m. However, it loaded down the output on 10...so I
removed the cap and bingo. I will look at the display
issue another time. I never thought I would get this
one working, but it is almost done. Just waiting for
the PA xstrs to arrive and should kick butt. The RX is
really killer now.

I do the radio repairs for $$$ and do the Atlas and
Cubic stuff for fun. No tubes any longer here...just
VINTAGE solid state. I recently made a deal on two
350XL's on working, one not. I haven't finished the
deal yet. One is very late model with digital and 305
VFO, the other is very early non-working with 311 xtal
osc.

Fun Fun Fun!!!
--- Jim <jimshire@... __________________________________________________
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| 463|458|2003-04-05 04:03:08|Jim|Re: Atlas210x--> PC200 problems ?|
Marc, good work. I've never actually sighted another Atlas. This one is a boomerang that I bought in the 70/80s and brother had it. Now I'm restoring (rebuilding!) it. There isn't much that didnt/doesnt need doing. I think it came to me via the middle east! I have a 215 coming via post from the states.....if it arrives! The idea was to try and make 1 good one out of 2 of them, we'll see.
The 350's with digi readout look great. No idea of how much of an improvement they were.
One thing about these vintage solid state things is that they certainly give one an opportunity to relearn all the stuff you've forgotten !
There was a 210 here for sale but by the time I'd asked a couple of questions it had been sold.

Jim

| 464|458|2003-04-05 04:34:22|Marc|Re: Atlas210x--> PC200 problems ?|
What does that term "boomerang" mean? I know what a
boomerang is though! I bought the 210 I have been
working on today at the Dayton Hamvention about 5
years ago. It wasn't working and I started the
repair/modification work but gave up and it sat in a
box for 4 years. I bought two 210x's last year from a
guy in Ohio with the DD-6C and a vox console. It was a
deal of one working but beat up and one clean but non
working. The working beater was not working very well
and required a lot of mod/repair. It was so bad it
could have NEVER worked right. There were wrong value
caps installed on the PC120 that I found when the
tuning wasn't right. It is working very nicely now.
The clean one was a late one with the 5645 IF and not
a scratch anywhere. The PSU console has no vox, but is
equally clean. The big problem with that one was a
shorted cap on the audio amp agc board. replaced it
and bang zoom to the moon. It was beautiful inside and
out. Like new!!!!! touched up the alignment and
amazing! I keep that one in storage cuz it is so nice.
I will use and abuse the beater that took so much
time. I mentioned that I found the rare 206 VFO a few
years ago too. I used it for the first time a few weks
ago, pretty cool! The thing only accomodates the early
IF, so it wont display correctly on my late 210x. I
was thinking of swapping displays with my DD-6C which
will read either by selecting an internal jumper. I
modified it to switch IF's by using the
"display-count" switch on the rear. I think I would
rather have my VFO able to read both IF's than the
display. Anyway, fun stuff! I will be looking out for
Atlas stuff at Dayton this year too. I saw a mint vox
console last year for $75 and passed. I got the Atlas
bug again obviously, so that won't happen this time.

Marc
--- Jim <jimshire@... __________________________________________________
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| 465|458|2003-04-05 04:34:31|Marc|Re: Atlas210x--> PC200 problems ?|
What does that term "boomerang" mean? I know what a
boomerang is though! I bought the 210 I have been
working on today at the Dayton Hamvention about 5
years ago. It wasn't working and I started the
repair/modification work but gave up and it sat in a
box for 4 years. I bought two 210x's last year from a
guy in Ohio with the DD-6C and a vox console. It was a
deal of one working but beat up and one clean but non
working. The working beater was not working very well
and required a lot of mod/repair. It was so bad it
could have NEVER worked right. There were wrong value
caps installed on the PC120 that I found when the
tuning wasn't right. It is working very nicely now.
The clean one was a late one with the 5645 IF and not
a scratch anywhere. The PSU console has no vox, but is
equally clean. The big problem with that one was a
shorted cap on the audio amp agc board. replaced it
and bang zoom to the moon. It was beautiful inside and
out. Like new!!!!! touched up the alignment and
amazing! I keep that one in storage cuz it is so nice.
I will use and abuse the beater that took so much
time. I mentioned that I found the rare 206 VFO a few
years ago too. I used it for the first time a few weks
ago, pretty cool! The thing only accomodates the early
IF, so it wont display correctly on my late 210x. I
was thinking of swapping displays with my DD-6C which
will read either by selecting an internal jumper. I
modified it to switch IF's by using the
"display-count" switch on the rear. I think I would
rather have my VFO able to read both IF's than the
display. Anyway, fun stuff! I will be looking out for
Atlas stuff at Dayton this year too. I saw a mint vox
console last year for $75 and passed. I got the Atlas
bug again obviously, so that won't happen this time.

Marc
--- Jim <jimshire@... __________________________________________________
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| 466|458|2003-04-05 04:48:22|Jim|Re: Atlas210x--> PC200 problems ?|
Marc, "boomerang" means something you throw and it comes back to you. I swapped this Atlas for a TS820 years ago. The 820 went bang in a big way. (transformer etc etc). Now my "little" brother has decided he has an emotional attachment to the Atlas (he has other modern gear). He's off to the UK in a couple of months so I promised to look at the Atlas. Didnt know what I was getting into. Every adjustment had been "adjusted" by someone. The regulator was shot, the PA chain is sus, etc etc but the rx goes like a rocket.
Have to admit that after this episode I've grown rather attached to the beast also :))
Fine on the convention etc. I'll just have to settle for ebay and hope that the US/Oz post will deliver instead of throwing things into the black postal void where so much seems to end up.
Cheers
Jim
http://www.jimshire.aussiewide.com/
| 467|458|2003-04-05 05:18:41|Marc|Re: Atlas210x--> PC200 problems ?|
OK...i get it now.....you traded your brother an 820
for the Atlas. I has a 820S station with VFO, speaker
and monitor scope with panadapter. Sold it 11 years
ago and regretted it. But hey.....progress. My modern
stuff is something I like to tinker with also. I have
a highly modified IC-765, highly modified IC-735 and
IC-706MK IIG. When I compete, I use the good stuff.
When I want a challenge I play with the atlas. I tried
to work the VP6DIA crew with the 210x and the 206
driving my SB-220, but I didn't bust the pile. I
missed the ST0RY dxp also. Oh well.....I live in an
apartment in NYC. A valley of buildings 300 feet
taller than mine. I suppose I am lucky to have a 4 EL
yagi at 85 feet above the street and legal limit.
Manhattan should be rare DX and an IOTA. Not too many
big guns left here. I am actually considered a big gun
on this island.
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| 468|468|2003-04-05 19:33:45|John P.|Calibrator |
Suggestions anyone -
I've got such a dead 210x that I can't even get output from the Calibrator -
voltages are at all boards are as they should be though. Needless to say, no
receive other than hiss.

PS: when 'replying' to messages, please cut the old messages as it makes it
much easier to read. Thanks.

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| 469|468|2003-04-05 19:57:38|Marc|Re: Atlas210x--> Calibrator|
I am working on my calibrator right this moment. RX is
good on my 210 as of yesterday. I found an open choke
on the PC-800. I cant read my schematic for the value.
I will need to research... This is the choke that
feeds the oscillator B+.

73 es GL

Marc WR2I
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| 470|468|2003-04-06 01:08:25|Jim|Re: Atlas210x--> Calibrator|
When you say you can't get output from the calibrator are you saying the calibrator is dead or the radio isn't hearing the output? Calibrator o/p can be checked with another rx.
Jim


[Non-text portions of this message have been removed]
| 471|471|2003-04-06 04:33:25|Jim|PC200 circuit|
Can anyone enlighten me as to the purpose of the tuned circuit in the RF output on PC200 please ?

Jim


[Non-text portions of this message have been removed]
| 472|471|2003-04-06 04:49:34|Marc|Re: Atlas210x--> PC200 circuit|
Match the output of the IF amp to the input of the
mixer
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| 473|471|2003-04-06 04:53:29|Jim|Re: Atlas210x--> PC200 circuit|
So does should it have a particular resonant freq or as its a z matching thing it doesn't really matter?
| 474|471|2003-04-06 05:11:28|Jim|Re: Atlas210x--> PC200 circuit|
Ah ha, thought so. Just discovered what it is. had to read parts list ...L205 .................... 0.6 uH I.F. Trap.
| 475|471|2003-04-06 05:23:10|Jim|Re: Atlas210x--> PC200 circuit|
That will teach me to read what I have before rushing onto the puter ! Ad duh Jim. Thanks Marc, help appreciated.
Cheers
Jim
| 476|471|2003-04-06 05:29:11|Jim|Re: Atlas210x--> PC200 circuit|
That will teach me to read what I have before rushing onto the puter ! Ad duh Jim. Thanks Marc, help appreciated.
Cheers
Jim
| 477|477|2003-04-06 06:14:41|zl1ujg|A few notes|
Hi All,
I am away from the PC for a few days and return finding 50 plus
emails...

A few comments I would like to make wrt Oscillator and Mixers

The earlier version 210X (5520 MHz IF and 3 stage bipolar VFO)
. The VFO level rolls off at the low end (3.5 MHz and 14 MHz),
probably due to the LC ratio of the oscillator. At the high
frequencies 28 MHz there is series R between the LO output and mixer
input. This together with the cable capacitance has a tendency to roll
off the LO level at the high end 28 MHz. (In my unit I removed the
series R's)I havent come across a solution for the low end drop in
level yet.

The mixers I see are configured strangely. The LO port is connected to
the same winding as the IF port.WRT to www.minicircuits.com
information the convention is to have the LO on the other winding. The
LO iolation is typically 20-30 dB greater in this configuration. If
one looks at the existing setup the LO/RF isolation is quite low (as
it is equivalent to the IF/RF isolation. I have rewired both mixers in
my unit providing 20-35 dB improvements in LO leakage (both in TX
output and RX input.
However the drive (5.520 MHz)appears to be worsened mainly due to the
mistermination of the 5.520 MHz modulator and dirty signal from the
5.520 MHz carrier oscillator. The carrier oscillator is reworked in
the 350 XL I believe to reduce this. I have not reworked this area
yet..

Kevin
ZL1UJG
| 478|478|2003-04-06 06:28:05|Jim|Re: Atlas210x--> A few notes|
Thanks Kevin, most illuminating. Yes we've been busy little bees, Atlas here, Atlas there etc. :))
Is there such a thing as a 350 circuit on the net ? Would be interesting to see the differences between the carrier oscillator circuits.
Cheers
Jim
| 479|478|2003-04-06 07:11:53|Marc|Re: Atlas210x--> A few notes|
Jim,

An FYI.....no 210's had IF traps installed at the
factory. Not all 210X's had traps either. Later ones
did, some early ones had them installed as per tech
service bulletin. My 210 has no traps at all. My early
210x has some, my late 210x has all of them. By the
way, Atlas service recommended bypassing some of them
as they did more harm than good.

Kevin,

The 210 no "X" is the unit with the problem with the
display in the 206 but not in the DD6-C (I think it is
that way or the other way around). I noticed a
transistor inside the 9 pin socket-plug on the DD-6C.
I wonder if this is a simple one xstr amp to preselect
the high freqs. I will investigate later. I have been
ripping apart my 210 due to bad calibrator. I found
open input choke, but that didnt fix it. I removed all
of the key components and will build another cal ckt
if the crystal is good.
This is the old 210 with the nightmare access problem
to the PC-800/820 combo board. I wonder what the dude
was smoking when he came up with the brilliant idea to
mount that board in the rear. It was the
70's.......must have been some good stuff. So, no time
for VFO level experiments. I may just bag the
calibrator. I don't really need it.

Marc
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| 480|480|2003-04-06 08:01:23|zl1ujg|350 xl maunual|
No problem,
Doesnt anyone look at the links section of this group?...
I must have posted the link to the ATLAS 350XL manual 3 months ago.
It was a real problem finding the manual in the first place,though...

Kevin
ZL1UJG
| 481|433|2003-04-07 11:49:53|Mark Hill|Re: Atlas210x--> Re: Hi folks!|
Ian,

Sorry we missed each other yesterday.

I am on 1942 at 21:00 UK local time most Sundays so drop in if you are
ever passing.

Regards.

Mark.

-------------------------------------------
At 19:09 04/04/2003 +0000, you wrote:
*********************************************
Mark Hill - G4FPH
E-mail: g4fph@...
Radio web site: www.g4fph.freeserve.co.uk

Aerials resonant on 1930/5300/7040 kHz
Send more electrolytics!
*********************************************
| 482|433|2003-04-07 12:04:59|g4fsu|Atlas210x--> Re: Hi folks!|
Hi Mark,

Yes, I did try - so perhaps propagation limited. Will look out for
you next Sunday. I am likewise on 1875kHz most Fridays after about
21:00 local. Also on 3675kHz Sundays between about 09:00-10:00
local, so drop by if you are on!

73 Ian G4FSU


| 483|468|2003-04-08 04:04:01|Marc|Re: Atlas210x--> Calibrator|
I now have a working calibrator in my 210. I built it
on perfboard (similar circuit as the 210x cal using a
pair of MPSH10's) and mounted it in the location of
the cal board in the 210x. Works great!!!

Installed blue LED's on meter and dial. Repaired
broken dial drum with cut off uniden land mobile
transceiver knob (metallized plastic strong!!!)
removed preamp ckt and built it on RF can relay
mounted to PC-100. I am using the dim swith to turn
the preamp on-off now.

Where are my PA transistors I ordered a week ago r
more!!!!!! I am getting close to a working radio.

More fun than adults should be allowed to have.

Marc WR2I
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| 484|468|2003-04-08 15:19:37|peter oesterle|Re: Atlas210x--> Calibrator|
Hi Marc. That is the beauty of the Atlas. It is a great radio at its core
that is also begging to be modified and improved (hot rodded if you will) so
that its performance easily exceeds that of the bells and whistle radios of
today that mere mortals cannot work on. IMHO
Pete VE3HOH/W3






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| 485|468|2003-04-08 15:35:26|Marc|Re: Atlas210x--> Calibrator|
Hey Pete,

I hot rod modern radios as well. Check out
www.icomclassic.com for some notes and pics on my hot
rodded IC-735. I think it is in the classic shacks
area. I have done similar to IC-781, IC-751A,IC-765
Yaesu FT-1000D, FT-1000MP FT-757GX and others.

Marc WR2I
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| 486|468|2003-04-08 15:48:10|Jim|Re: Atlas210x--> Calibrator|
Hey Marc, the pix are there but you'd better hurry up and post the notes :)) I mean nice set but what the heck did you do to it ?
Cheers
Jim
| 487|468|2003-04-08 16:11:03|Marc|Re: Atlas210x--> Calibrator|
click the link that says HERE in the classic shacks.
There is a story with a lict of mods
--- Jim <jimshire@... _________________________________________________________________
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| 488|488|2003-04-09 11:13:31|Mark Hill|Download trouble|
Folks,

I'm having trouble downloading the PDF format 210 manual from the 'Files'
section. I have tried several times now and on each occasion the download
terminates prematurely and I'm left with an unusable file.

Does anyone have a good copy of this PDF? If so, please e-mail direct to
me at (I hope I can fool Yahoo into displaying my e-mail
address: substitute an @ symbol for the 'at' in g4fph'at'mjha.co.uk.)

Thanks.

Regards.

Mark.
*********************************************
Mark Hill - G4FPH
E-mail: g4fph@...
Radio web site: www.g4fph.freeserve.co.uk

Aerials resonant on 1930/5300/7040 kHz
Send more electrolytics!
*********************************************
| 489|489|2003-04-09 11:52:28|Jim|Re: Atlas210x--> Download trouble|
Mark, I tried to download it for you but am having the same trouble.
Cheers
Jim
| 490|489|2003-04-09 13:54:19|Mark Hill|Re: Atlas210x--> Download trouble|
Jim,

Many thanks for trying. Let's see if anyone on the line has a good copy.

Regards.

Mark.

--------------------------------------
At 19:52 09/04/2003 +1000, you wrote:
*********************************************
Mark Hill - G4FPH
E-mail: g4fph@...
Radio web site: www.g4fph.freeserve.co.uk

Dipoles resonant on 1930/5300/7040 kHz
2 ele delta loop beam on 14200 kHz
Send more electrolytics for my PA PSU!
*********************************************
| 491|491|2003-04-12 00:04:10|beckenro|Lamps for Frequency Display|
Anybody have a source for the two lamps that are mounted under the
frequency dial drum on a 210x ? Thanks Bill, Spring, TX W5SG
| 492|491|2003-04-12 00:51:59|Marc|Re: Atlas210x--> Lamps for Frequency Display|
They are generic grain-o-wheat lamps. 12V 60 ma.

MARC
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| 493|491|2003-04-12 02:04:42|beckenro|Re: Atlas210x--> Lamps for Frequency Display|
Thanks Marc, I'll check at Radio Shack to see if they stock them. Bill
| 494|491|2003-04-12 02:37:21|Marc|Re: Atlas210x--> Lamps for Frequency Display|
They do have them, but the leads are short. If you
need long leads I have a source, but they have a $25
min order.
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| 495|495|2003-04-12 03:50:59|beckenro|Microphone for 210x|
Anybody out there have an extra Hi-Impedance microphone for sale that
would be compatible with a 210x? I've been off the air for many years
and recently procurred a 210x that seems to work ok on CW but need a
microphone to check it out on SSB. Thanks, Bill, Spring, TX W5SG
| 496|496|2003-04-12 05:09:53|wb6rlg_bwmrc.com|Re: Atlas210x--> Microphone for 210x|
Check out EBAY I bought brand new 404c for 15 bucks..
wb6rlg
| 497|496|2003-04-12 05:13:02|Marc|Re: Atlas210x--> Microphone for 210x|
I found a 444D on ebay for $13 plus shipping. My
Turner PLUS THREE amplified CB mic works better
though.
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| 498|498|2003-04-12 15:11:56|beckenro|Atlas Users in Houston, TX Area|
Any Atlas 210 or 215 users in the Houston area? Would like to check
out a few things on my 210x with you.
Thanks, Bill, W5SG (281) 370-4258
| 499|499|2003-04-13 01:18:59|Jim|A found fault|
I had low drive that seemed toget worse on the lower bands of the 210x. Not having a level diagram or another set to check with I was scratching my head as to where the fault was. There did seem to be a lot of loss in the tx filters to the PA. (but there wasn't). Also the audio was down.
Not being an old hand with the Atlas I looked at PC200 and couldn't find anything that seemed astray until I accidently touched the cro probe on the dc supply to the board whilst feeding tone into the tx. There was a large tone waveform on the dc supply. Bridged it with a 100uf and bingo! Everything was up and levels were no longer the problem that they had been.
As the electros are pretty much original I suspect that they should all be changed as a matter of course. Pretty straightforward I guess but there you go.

Cheers
Jim



[Non-text portions of this message have been removed]
| 500|500|2003-04-19 21:33:17|declind|ATLAS RADIO DD-6C display for 210X|
Lokking for a downloadable manual and/or schematic for this display.I
would like to avoid going to the manual Gods! BAMA has nothing! Any
lead appreciated.
73
Jan
VE2JL
| 501|501|2003-04-21 01:53:34|pebjag|Who's the 210x Repair Guru?|
I need to get an Atlas 210x rig worked on. Where can someone send a
210x rig these days to get good work done reliably? I'll probably
take a crack at it myself, but if I gork it up, it'd be nice to know
where to go next...
Thanks,
- WB1CDG
| 502|502|2003-04-21 06:11:38|Ben K8DIT|Re: Atlas210x--> Who's the 210x Repair Guru?|
Dave, The guru on the West Coast is K8EYU Glenn, his email is
gcf@... in Lynden, Wa. He's been advertising in Worldrado and CQ
since the 80s. He's been repairing them a long while. Give him a shout
(email) Ben K8DIT
Bellingham, Wa.
| 503|503|2003-04-24 18:50:16|VE2JL|Board switching on 210X|
I recently picked up a clean but non-functioning 210x which has the
same IF as my good 210X.
What risk is there in switching boards to locate problem board in my
second 210X? I already have audio nopise but no signal.(IF board
problem?). Any thoughts or ideas appreciated.
Jan, VE2JL
| 504|503|2003-04-24 20:12:39|Marc|Re: Atlas210x--> Board switching on 210X|
No problem to swap boards in any of the 210x's with
exception of the carrier oscillator board. The other
catch is the IF traps on the later units with 5645 IF
will be detuned. But for chasing troubles you should
be okay.

GL,

Marc
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| 505|505|2003-04-29 22:21:04|Tom|wish me luck! I'm going in!!|
I just dusted off the atlas, and found a manual. I'm going in to tune
it up(if i need to). It has a good RX but I don't want to TX until I
test everything out. The XYL has warned me about burning down the
house and roasting cats in the garage. (Flash back to building a two
tube transmitter.....we have a new garage now.... And a new cat.)
Anyway, I'll be lurking and reading. And asking for info from
the "elmers" out there.
Thanks
Tom KD6MES
| 506|506|2003-04-29 23:30:00|Ben K8DIT|Re: Atlas210x--> wish me luck! I'm going in!!|
Tom, Unless you have and know how to use an oscilliscope and signal
generator, I suggest you not try to tune the Atlas. The road to perdition is
paved with Atlas radios that were discarded because they were misaligned by
well meaning folks who did not understand Herb Johnson's design schema even
with gents who had and knew how to use a scope and sig gen. For more info
read the archives to this news group.
| 507|507|2003-04-30 20:29:39|beamshoot|Modulation on 210x|
Any one have a good result to drive in ssb with a good mike.
To modulate my 210x is very hard.
I think to place a good j-fet like MPF102.

73 Emy
I2QEN
| 508|507|2003-04-30 20:56:42|Marc|Re: Atlas210x--> Modulation on 210x|
Use a High Imp. or amplified microphone. I use either
Shure 444D, 450 and also have very good results with
Turner plus three. All of these are desk mics.

73,

Marc
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| 509|507|2003-04-30 21:08:06|Marc|DD6 AND 206 VFO PROGRAM CHIPS AVAILABLE!!!!!!|
Hi All,

My latest project was to repair a 206 VFO. I have
invested a lot of time and $$$ into this. I have
available the PROMS for the "EARLY" 5520 KHz IF
180/210/215's 206 VFO and DD-6/B. I also have PROMS
for the DD6B/C for BOTH "EARLY" and "LATE" IF's (two
required for this.

Coming soon.....in the works, drop in PROM to change
"EARLY" IF 206 VFO or DD6 to "LATE" 5645 IF.

Let me know what you all need. I have Chips IN STOCK!

Marc WR2I
The Radio Clinic of NYC
High Performance radio sales/service

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| 510|507|2003-04-30 23:31:18|beamshoot|Re: Atlas210x--> Modulation on 210x|
Yes i think i have to do that !
Atlas have 47k resistor input.

Thahk's Marc

| 511|511|2003-05-01 00:37:45|Stuart Liss|Microphone for Atlas|
Hi,

You can buy a microphone from Heil and also get an audio transformer
(they sell them, but won't install it for you). This is a very nice
microphone. I have the mobile model and leave it on the DX setting
all the time.

Stuart Liss, WA2PQE
liss@...

| 512|511|2003-05-01 00:53:18|Marc|Re: Atlas210x--> Microphone for Atlas|
Heil is Chinese junk.....
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| 513|513|2003-05-14 00:52:50|Jan Lindstrom|Re: Atlas210x--> DD6 AND 206 VFO PROGRAM CHIPS AVAILABLE!!!!!!|
| 514|513|2003-05-14 01:23:39|Marc|Re: Atlas210x--> DD6 AND 206 VFO PROGRAM CHIPS AVAILABLE!!!!!!|
Do you need these as well?

These are $14 each plus shipping.

Marc
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| 515|515|2003-05-14 01:34:13|Marc WR2I|Dayton Hamvention|
Any members of this group going to be at the Hamvention? I am! I
would like to meet any of you all out there.

73,

Marc WR2I
| 516|516|2003-06-22 20:03:00|n2dqz|No Power, High Resting|
Well well, so glad to finally find some significant info on Atlas
Radios. I have had this 210X since it was brand new. Actually
bought by my Father and Brother when they first came out. They
bought 2. I still have the one (TH4939(Label on back)) and used it
for quite some time. Mostly for CW (Got over the inconvienances)and
Mobile SSB. I Love this rig!! Output stopped working some 10 years
ago. Gave up the hobby till now. Would love to get it going again.
The problem is "No Output" and "High Resting Current (8 amps)".
Also, when in trans. the meter jumps around a little. I do have a
pair of brand new MRF 454's that my Brother had givin to me saying I
will need them someday! And a Driver Transistor RCA 40582. He wasnt
too fond of the Atlas. Having worked on the other radio, he claimed
the schematic for the P.A. had a mistake in it and the SWR protect
circuit was "a problem". Anyway, being of limited knowledge with
respect to troubleshooting, I am asking for any assitance I can
receive. I am fairly good at reading a schematic and soldering so
if anyone thinks this is an easy fix, I'll be open to the idea.
Would like fix it myself. I have seen the couple of names
of "techs" but am on a limited budget being married with 3 kids.
(Still gotta put them through college somehow!)
Any help out there? Best Regards. Art. New York.
| 517|517|2003-06-22 20:34:40|Ben K8DIT|Re: Atlas210x--> No Power, High Resting|
Unless you are savvy with an rf gen. and an oscilliscope, I would not
recommend it. There is no published service information/maual and only the
guys who understand the design get it right. Having been priveledge to stand
at the elbow of the man who fixes em saying that 2/3rds of the repairs are
undoing mods placed by well meaning techs. He then returns them to original
using his service monitor to bring the goodies home to spec. I dont want to
alarm you needlessly as hams need to learn such skills if the risk is low.
If the finals are gone, its easy enough to figure out, just that there could
be other components needing replacement that you may not discover that will
blow whatever new finals you install.
I like to think and say my old saw, "its the stingy man who spends the most"
when it comes to cars and radio repair. Ive seen glen, k8eyu, remove a tiny
capacitor housed within an inductor inside of one of the cans on the 350xl,
that was so illusive as to be invisible. No further problem was found and
the rig returned to normal after a realignment.
| 518|516|2003-06-22 20:43:33|Erik Westgard|Re: Atlas210x--> No Power, High Resting|
This sounds like bad/shorted TX transistors? I would also check the PA
board and the output filter toroids for anything burned out.

-----Original Message-----
From: n2dqz [mailto:n2dqz@...]
Sent: Sunday, June 22, 2003 1:03 PM
To: atlas210x-215x@yahoogroups.com
Subject: Atlas210x--

Well well, so glad to finally find some significant info on Atlas
Radios. I have had this 210X since it was brand new. Actually
bought by my Father and Brother when they first came out. They
bought 2. I still have the one (TH4939(Label on back)) and used it
for quite some time. Mostly for CW (Got over the inconvienances)and
Mobile SSB. I Love this rig!! Output stopped working some 10 years
ago. Gave up the hobby till now. Would love to get it going again.
The problem is "No Output" and "High Resting Current (8 amps)".
Also, when in trans. the meter jumps around a little. I do have a
pair of brand new MRF 454's that my Brother had givin to me saying I
will need them someday! And a Driver Transistor RCA 40582. He wasnt
too fond of the Atlas. Having worked on the other radio, he claimed
the schematic for the P.A. had a mistake in it and the SWR protect
circuit was "a problem". Anyway, being of limited knowledge with
respect to troubleshooting, I am asking for any assitance I can
receive. I am fairly good at reading a schematic and soldering so
if anyone thinks this is an easy fix, I'll be open to the idea.
Would like fix it myself. I have seen the couple of names
of "techs" but am on a limited budget being married with 3 kids.
(Still gotta put them through college somehow!)
Any help out there? Best Regards. Art. New York.



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| 519|516|2003-06-22 21:04:47|Marc|Re: Atlas210x--> No Power, High Resting|
Hi Art,


Where in NY are you?

Marc WR2I
The Radio Clinic of NYC
High Performance radio sales/service
--- n2dqz <n2dqz@... __________________________________
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| 520|520|2003-06-27 04:24:53|Art|No Power, High Resting, Solved!|
Just wanted to report that the Power problem with my 210X has been
repaired. Many thanks go to Marc WR2I for walking me through the
checking of my Finals, which were indeed BAD. All is good now so
far. An alignment is probably needed. Thank You also to others who
responded. 73. Art.
| 521|521|2003-06-27 06:05:59|Ben K8DIT|Re: Atlas210x--> No Power, High Resting, Solved!|
Art, keep us informed of your progress, congratulations on fixing your 210x!
Ben
| 522|522|2003-06-27 06:26:13|wb8bhu|mike for 210|
I have just purchased a fairly nice 210 which I plan to run mobile.
Problem is I do not have a mike. Can any one tell me what mike was
supplied by Atlas for the 210? From pictures I have seen, it looks
like a Turner 350-c which I believe was a ceramic mike. Would this
be usable? Or as a last resort if someone knows the mike impedance
needed, I can probably adapt something else.Thanks! Robb wb8bhu
| 523|523|2003-06-27 07:12:46|oh2ev@sral.fi|Re: Atlas210x--> mike for 210|
It needs a high impedance mic in the range of 30k-50k, for example
Shure 404C. I have a Shure 404B which is low imp and I need a separate
mic amp (which I made) to get decent drive.

de Esa, OH2EV

-----Original Message-----
From: wb8bhu [mailto:wb8bhu@...]
Sent: 27. kesäkuuta 2003 7:25
To: atlas210x-215x
Cc: wb8bhu
Subject: Atlas210x--

I have just purchased a fairly nice 210 which I plan to run mobile.
Problem is I do not have a mike. Can any one tell me what mike was
supplied by Atlas for the 210? From pictures I have seen, it looks
like a Turner 350-c which I believe was a ceramic mike. Would this
be usable? Or as a last resort if someone knows the mike impedance
needed, I can probably adapt something else.Thanks! Robb wb8bhu



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| 524|523|2003-06-27 14:40:34|wb6rlg_bwmrc.com|Re: Atlas210x--> mike for 210|
All Atlas Radios were sold with an optional Mic, Shure 404-c or 444-d (Desk Mic). Although the Atlas has excelant audio, over the years some loose there punch and a small mic-amp adds that old zing.
| 525|523|2003-06-27 15:07:23|Marc|Re: Atlas210x--> mike for 210|
Hi all,

I have been doing an "independent test" so to speak on
mics compatible with 210's.

They are the following and results.

Shure 450: Good audio but needs more gain.
Shure 444D: Same as above.
Shure 404 magnetic same as above
Turner Plus three base: Superb audio reports lots of
gain....So far the best mic.
Turner Plus 2 base: Excelent audio but not enough gain
in the amp.

Turner M+3: Acceptable audio quality plenty of gain.
Astatic 575M6:Very good audio, sufficient gain.
Astatic 10-D on TUG8 stand (amplified)Great audio a
bit light on gain.

Turner Super Sidekick is on the way here for test. I
have a nice mic collection now.....HiHi.

Marc WR2I
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| 526|526|2003-06-27 18:47:56|Douglas|Noise blanker pcb|
Does anyone have a spare noise blanker pcb for
the 210 series that they'd sell?

Doug/WA1TUT


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| 527|523|2003-06-27 23:20:25|Rick McKee|Re: Atlas210x--> mike for 210|
I used a plain old 600 ohm dynamic mic (CB mic) from Radio Shack with
mine ! Got real good audio reports with it and it had plenty of drive
too !

72/73 de: Rick McKee, KC8AON < SW 40+, HW-8, Yaesu FT-7, Homebrew 6V6 tube TX & Hallicrafters SW500 RX
QRP-L #2112, FPqrp #33, AR QRP #269
QRP'ers DEPEND ON SKILL - NOT RAW POWER !

On Fri, 27 Jun 2003 04:25:13 -0000 "wb8bhu" <wb8bhu@... ________________________________________________________________
The best thing to hit the internet in years - Juno SpeedBand!
Surf the web up to FIVE TIMES FASTER!
Only $14.95/ month - visit www.juno.com to sign up today!
| 528|522|2003-06-28 22:56:45|Stuart Liss|Re: mike for 210|
Hi,

You can also buy a mike from Heil. They sell an audio transformer which will
match the high impedence (fits inside the mike). I use their mobile mike with a
DX/Regular switch on the back of it.

Stuart, wa2pqe
| 529|522|2003-06-29 06:13:23|wb8bhu|mike for 210|
Thanks everyone for your help! Looks like I will need to locate a
Shure 404-C to be "authentic" when I run the 210 mobile. The mike
available from Heil also sounds workable. I have a bunch of old CB
etc mikes so might just try them and see what results can be
obtained. Again, thanks all. Hope to meet on air!
73,
Robb
| 530|530|2003-06-29 06:41:56|parnold|Re: Atlas210x--> Noise blanker pcb|
Atlas Noise Blanker -

I think these are very difficult to find, I've been looking at Dayton for the
past several years. I'm also looking for a Drake 34PNB noise blanker for my
TR-4C, no luck. The only ones I've seen for either are in the radio and they
won't sell them separately. Maybe we should get together and try our luck at
duplicating this function on a newly designed PCB and get a group purchase
going. There are companies out there advertising in various electronics
magazines where you can get a double sided PCB with plated through holes, etc.
for very reasonable prices (under $10.00 each in 25 lot purchases). We just need
someone who can get a good one going and send the schematic to one of these
companies. Just a suggestion.

KØSEP
Raymore, MO
| 531|530|2003-06-29 16:09:14|Rick McKee|Re: Atlas210x--> Noise blanker pcb|
Look at the noise limiter circuit in the files section that you can
build, very simple and easy !

73,
Rick,KC8AON

On Sat, 28 Jun 2003 23:36:16 -0500 parnold <parnold@... writes:
________________________________________________________________
The best thing to hit the internet in years - Juno SpeedBand!
Surf the web up to FIVE TIMES FASTER!
Only $14.95/ month - visit www.juno.com to sign up today!
| 532|530|2003-06-30 03:45:26|parnold|Re: Atlas210x--> Noise blanker pcb|
Rick;

You probably already know this, but there is a huge difference between a noise
limiter and a noise blanker. Blankers are very complex circuits - much like a
wide band receiver that receives noise, outside the desired pass band, inverts it
and then mixes it back into the receiver IF path, canceling much of the noise. I
believe the Drake 34PNB has numerous IF transformers and a filter along with many
other active and passive components. Since I'm no expert about all this, I'd
like to know more and see some schematics of true blankers.

Paul KØSEP





Rick McKee wrote:

--

"We fight not to enslave, but to set a country free, and to make
room upon the earth for honest men to live in." --Thomas Paine
| 533|530|2003-07-03 09:20:10|Harry|Re: Atlas210x--> Noise blanker pcb|
Hi, All ---

I've just put a new folder in the Files, named "Noise Silencers".
In it are the copies of pages from the Atlas 210X/215X Manual
with the descriptions and schematics for:

- PC-100C 1st Mixer / 1st IF (without the Noise Blanker)
- PC-120 1st Mixer/ 1st IF (with the Noise Blanker)
- A circuit from the 1988 ARRL Handbook for an IF Noise Silencer

with the write-ups of how they work in blanking out pulse noise.

I hope you find them useful.

Harry
K5HML
San Antonio, Texas


| 534|522|2003-07-03 10:19:34|Harry|Re: mike for 210|
_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _

From the Atlas 210X/215X Manual:

"2-15. MICROPHONE CONNECTIONS. The microphone may be
either a dynamic or crystal type. A low-impedance mic
will work, but will require higher setting of the Mic Gain
control, and may require closer speaking. If a dynamic
mic is selected, it should preferably be the high-impedance
type. The choice of microphones is important for good
speech quality, and deserves careful consideration.
Select a high quality mic with smooth response from 300 to
3000 Hertz or more. An excellent choice is the Shure 404C
hand mic. The plug required for the mic connector is a
standard 1/4 inch diameter, 3 conductor type. The tip
connection is the keying circuit for press-to-talk, the
ring connection is for the shielded mic lead, and the sleeve
or barrel is the common ground terminal."
_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _

Most high-impedance mikes will work very well with the
Atlas rigs, although some have their audio response tailored
better than others for communications use (300-3000 Hz).
CB mikes are probably pretty good, but I'd stay away from
the "hi-fi" types which don't pack as much intelligibility
where it counts the most.

The mobile mic that I have right now for use with my 215X and
other mobile rigs is the Collins MM-1 Dynamic mic (excellent
audio).
I am, however, planning to put together an adapter box so I
can use my aviation headset with its noise-cancelling
boom mic (electret), and have the push-to-talk switch
mounted on the steering wheel in the car, just like in the
aircraft. That way, I can keep both hands on the wheel
while driving except when tuning the radio dial.

Harry, K5HML



| 535|530|2003-07-04 08:26:04|Harry|Re: Atlas210x--> Noise blanker pcb|
Correction --- The name of the folder is "IF Noise Blankers".

Harry


| 536|536|2003-07-05 19:36:31|wb8bhu|looking for mobile mount|
Tnx all for info on mikes for my 210. NOW, anyone have a mobile
mount they would like to part with?
Robb wb8bhu wb8bhu@...
| 537|537|2003-07-23 13:33:05|Jim Potts|PC120 coil|
Hi all. Well finished fixing the 210x, everything was in really bad
nick. Many hours spent. Bought a 215 as a "bitser" and it finally
arrived after 20 weeks from the States.(Sent normal mail) I rekkon
its seen more of the world than I have.
Anyway the chassis and components in the 215 are in better shape than
those in the 210X. So, power it up and no rx, no tx , no surprise.
Sig gen out and rx front end deafer than me when wife wants the
garbage put out. (300ft driveway). It seems ok so swap the pc100
board from the Atlas and there she goes. Check pc120 board and
someone has modded and deaded it. With Pc100 its great, so I end up
looking at the first tuned coil after the bal mixer. It's crook, so
pull it out and sure enough its broken. First problem, replace the
coil with a torroid...datails from files section ? Or are there
alternatives?
On tx we have a strange thing also. No tx on CW. Plenty of nullable
carrier on the sideband position. Change 2nd IF amp board and still
no joy. Plenty of output but from the wrong switch position. Hmmmm...
I suppose I at least have a workable 210x :))
Cheers
Jim VK4BBG
| 538|538|2003-07-23 21:54:57|roy|new to the group|
I just recieved a 210x I bought on ebay. Looks like everything is
working except the frequency dial was loose and needed tightening.I
eas wondering if there was a net going where i could compair it with
other radios.
73s aa5fs roy
| 539|538|2003-07-24 04:21:05|Marc|Re: Atlas210x--> new to the group|
I have wondered the same thing. Why haven't the Atlas
users coordinated a net? Anyone else interested?

Marc WR2i
--- roy <AA5fs@... __________________________________
Do you Yahoo!?
Yahoo! SiteBuilder - Free, easy-to-use web site design software
http://sitebuilder.yahoo.com
| 540|540|2003-07-24 16:48:15|taylor955m|New to board with a PC300-D/AGC problem|
In a word, HELP! Just got a fairly late 210X (w/console) and have
fallen in love, save one problem. Everything works fine until I
transmit (which works fine in and of itself). When the unit is
switched back to receive, I lose all receive AGC action and, of
course, have a dead S-meter. I do hear plenty of signals, though,
with the big ones really pounding in due to the lack of AGC. Letting
the radio sit for some time (hours, not minutes) has cured it a time
or two, but not any more. Just keying the mike didn't seem to cause
the problem -- actually talking did.

I have replaced Q301 on board PC-300D as a hopeful shot in the dark
quick fix, but no change. BTW, the voltage chart says I should have
+12V on pin 14 of Q301, but I only get 4.2 or so (the edge connector
voltages are all OK). I suspect the chart is wrong since I'm not sure
how you can get 12V on that pin as I read the schematic, but I could
be wrong. I offer it as both a question and possible clue . I have
also checked the incoming transmit ALC voltage at the edge connector
and it never rises above 5V even at the highest ALC level setting, so
I don't think there's an overshoot issue. This ALC voltage does not
seem to appear at pin 6 of Q301. Shouldn't it? I am tempted to
replace everything associated with the Q301B AGC circuit and hopoe
for the best.

Any ideas? Thanks.

Tim
N2TC
| 541|538|2003-07-24 19:34:44|sasi nayar|Re: Atlas210x--> new to the group|
else interested?

Great. Would love to see that happen!
73
Sasi
9V1SM

=====
Amateur Radio For Global Peace and Fraternity
----------------------------------------------
Sasi Nayar, 9V1SM / VU3SNM,
Marine Biology Lab, Department of Biological Sciences
National University of Singapore,14 Science Drive 4
Singapore 117 543. Tel : (65) 6874 6867 URL:http://www.dbs.nus.edu.sg/lab/reef/SasiNayar.htm

__________________________________
Do you Yahoo!?
Yahoo! SiteBuilder - Free, easy-to-use web site design software
http://sitebuilder.yahoo.com
| 542|542|2003-07-25 00:20:10|PEB JAG|Re: Atlas210x--> Digest Number 182|
A net with fellow Atlas fans might be fun!
- WB1CDG



atlas210x-215x@yahoogroups.com wrote:

To unsubscribe from this group, send an email to:
atlas210x-215x-unsubscribe@egroups.com


------------------------------------------------------------------------

There are 2 messages in this issue.

Topics in this digest:

1. new to the group
From: "roy"
2. Re: new to the group
From: Marc


________________________________________________________________________
________________________________________________________________________

Message: 1
Date: Wed, 23 Jul 2003 19:54:54 -0000
From: "roy"
Subject: new to the group

I just recieved a 210x I bought on ebay. Looks like everything is
working except the frequency dial was loose and needed tightening.I
eas wondering if there was a net going where i could compair it with
other radios.
73s aa5fs roy



________________________________________________________________________
________________________________________________________________________

Message: 2
Date: Wed, 23 Jul 2003 19:21:04 -0700 (PDT)
From: Marc
Subject: Re: new to the group



I have wondered the same thing. Why haven't the Atlas
users coordinated a net? Anyone else interested?

Marc WR2i
--- roy wrote:
__________________________________
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________________________________________________________________________
________________________________________________________________________



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---------------------------------
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[Non-text portions of this message have been removed]
| 543|540|2003-07-25 01:18:38|Marc|Re: Atlas210x--> New to board with a PC300-D/AGC problem|
Hi,

Try this before anything else. Remove PC-100/120,
clean edge card finger contacts with pencil eraser,
remove plastic dust cover from relay, clean contacts
with burnishing tool, treat all contacts with deoxit
and progold.

Then check for proper operation. You should do this to
the other two plug-in cards as well.

Marc WR2I
The Radio Clinic of NYC
High Performance radio sales/service
--- taylor955m <parkerfly3@... __________________________________
Do you Yahoo!?
Yahoo! SiteBuilder - Free, easy-to-use web site design software
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| 544|538|2003-07-25 01:56:34|Ben K8DIT|Re: Atlas210x--> new to the group|
Ive got some old costumes in the barn and Mrs. Rinkle says she can fix em up
with her old sewing
machine. I think itd be swell! How about Sunday after church? Dadgummit
let's do it! 20meters would probably be the best bet.
| 545|542|2003-07-25 03:16:53|Erik Westgard|Re: Atlas210x--> Digest Number 182|
How about 20M maybe on a Saturday noon-ish?

-----Original Message-----
From: PEB JAG [mailto:pebjag@...]
Sent: Thursday, July 24, 2003 5:20 PM
To: atlas210x-215x@yahoogroups.com
Subject: Re: Atlas210x--

A net with fellow Atlas fans might be fun!
- WB1CDG



atlas210x-215x@yahoogroups.com wrote:

To unsubscribe from this group, send an email to:
atlas210x-215x-unsubscribe@egroups.com


------------------------------------------------------------------------

There are 2 messages in this issue.

Topics in this digest:

1. new to the group
From: "roy"
2. Re: new to the group
From: Marc


________________________________________________________________________
________________________________________________________________________

Message: 1
Date: Wed, 23 Jul 2003 19:54:54 -0000
From: "roy"
Subject: new to the group

I just recieved a 210x I bought on ebay. Looks like everything is
working except the frequency dial was loose and needed tightening.I
eas wondering if there was a net going where i could compair it with
other radios.
73s aa5fs roy



________________________________________________________________________
________________________________________________________________________

Message: 2
Date: Wed, 23 Jul 2003 19:21:04 -0700 (PDT)
From: Marc
Subject: Re: new to the group



I have wondered the same thing. Why haven't the Atlas
users coordinated a net? Anyone else interested?

Marc WR2i
--- roy wrote:
__________________________________
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http://sitebuilder.yahoo.com


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| 546|540|2003-07-25 03:27:18|Tim Nichols|Re: Atlas210x--> New to board with a PC300-D/AGC problem|
Thanks. Even if this doesn't cure the problem, it can't hurt.
-----Original Message-----
From: Marc [mailto:wr2i@...]
Sent: Thursday, July 24, 2003 7:19 PM
To: atlas210x-215x@yahoogroups.com
Subject: Re: Atlas210x--

Hi,

Try this before anything else. Remove PC-100/120,
clean edge card finger contacts with pencil eraser,
remove plastic dust cover from relay, clean contacts
with burnishing tool, treat all contacts with deoxit
and progold.

Then check for proper operation. You should do this to
the other two plug-in cards as well.

Marc WR2I
The Radio Clinic of NYC
High Performance radio sales/service
--- taylor955m <parkerfly3@... __________________________________
Do you Yahoo!?
Yahoo! SiteBuilder - Free, easy-to-use web site design software
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[Non-text portions of this message have been removed]
| 547|542|2003-07-25 03:27:36|Erik Westgard|Re: Atlas210x--> Digest Number 182|
Sunday is fine too...

-----Original Message-----
From: Erik Westgard [mailto:ewestgard@...]
Sent: Thursday, July 24, 2003 8:13 PM
To: atlas210x-215x@yahoogroups.com
Subject: RE: Atlas210x--

How about 20M maybe on a Saturday noon-ish?

-----Original Message-----
From: PEB JAG [mailto:pebjag@...]
Sent: Thursday, July 24, 2003 5:20 PM
To: atlas210x-215x@yahoogroups.com
Subject: Re: Atlas210x--

A net with fellow Atlas fans might be fun!
- WB1CDG



atlas210x-215x@yahoogroups.com wrote:

To unsubscribe from this group, send an email to:
atlas210x-215x-unsubscribe@egroups.com


------------------------------------------------------------------------

There are 2 messages in this issue.

Topics in this digest:

1. new to the group
From: "roy"
2. Re: new to the group
From: Marc


________________________________________________________________________
________________________________________________________________________

Message: 1
Date: Wed, 23 Jul 2003 19:54:54 -0000
From: "roy"
Subject: new to the group

I just recieved a 210x I bought on ebay. Looks like everything is
working except the frequency dial was loose and needed tightening.I
eas wondering if there was a net going where i could compair it with
other radios.
73s aa5fs roy



________________________________________________________________________
________________________________________________________________________

Message: 2
Date: Wed, 23 Jul 2003 19:21:04 -0700 (PDT)
From: Marc
Subject: Re: new to the group



I have wondered the same thing. Why haven't the Atlas
users coordinated a net? Anyone else interested?

Marc WR2i
--- roy wrote:
__________________________________
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Yahoo! SiteBuilder - Free, easy-to-use web site design software
http://sitebuilder.yahoo.com


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________________________________________________________________________



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[Non-text portions of this message have been removed]



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| 548|542|2003-07-25 03:39:24|Ben K8DIT|Re: Atlas210x--> Digest Number 182|
There are a number of User nets on the high end of 20 meters starting at
1700UTC. The Collins net is at 14.263.00, the boatanchors, Hallicrafters and
Heatkit are at 14.292.00 and the Ten Tec is at 14.329.00 all at staggered
later times. The last one ends at about 2300UTC, on 20 meters. So I suggest
riding the coat tails of one of these nets. I am partial to the boatanchor,
Halli-Heath at 292.00 but 329 is often clearer either before or after the TT
net at 2200. plus or minus a few minutes. Know that condx will vary and
beams/amps will rule the day as far a being heard by most of the rest of us.
What say you?
| 549|542|2003-07-25 04:37:57|Marc|Re: Atlas210x--> Digest Number 182|
I am not a net person, but this one could be
interesting. Any time/freq guidance will be
appreciated. The eves on 20m are great lately for dx
and stateside. I run amp and beam, so I think I will
be heard.

Marc WR2I--- Ben K8DIT <benk8dit@... __________________________________
Do you Yahoo!?
Yahoo! SiteBuilder - Free, easy-to-use web site design software
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| 550|550|2003-07-25 08:51:19|jt|Atlas net|
Marc-RE your suggestion for Atlas net--Im in Hawaii on the big island--Post a time UTC and freq-on 20 meters--ill try to be there---jt
J Thibadeaux
75FJ40-
NH7FJ
From the hill==

[Non-text portions of this message have been removed]
| 551|550|2003-07-25 16:13:07|Marc|Re: Atlas210x--> Atlas net|
Hmmmm.....east cost mainland to south pacific? You
must like to get up REALLY early!

Maybe it should not be a net but a group sked to show
off and discuss projects?

I dunno......someone get on 20 meters tonight...let's
chat.

Marc WR2I
--- jt <jt@... __________________________________
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| 552|550|2003-07-25 18:32:52|Mark Hill|Re: Atlas210x--> Atlas net|
Folks,

I shall be on 20 this evening, around 14175 at 2130 UTC. Don't think I've
ever tried my 215x on 20!

Regards.

Mark.

----------------------------------------------------
At 07:13 25/07/2003 -0700, you wrote:
*********************************************
Mark Hill - G4FPH
E-mail: g4fph@...
Radio web site: www.g4fph.freeserve.co.uk

Dipoles resonant on 1940/3760/7060 kHz
2 ele delta loop beam on 14180 kHz
*********************************************
| 553|553|2003-07-25 20:11:42|AA5fs@aol.com|Re: Atlas210x--> Digest Number 183|
In a message dated 7/25/03 8:33:08 AM Central Daylight Time,
atlas210x-215x@yahoogroups.com writes:

2200 on 14.329 sounds real good to me sence i only have a 20m antenna up
right now.It will be mid august before I get around to the other bands.I also
listen to some of those nets on sunday.
73'a all aa5fs roy


[Non-text portions of this message have been removed]
| 554|554|2003-07-26 22:59:45|on4mic|VX-5M CW semi breaking|
Hi,

I'm looking for VX-5M (module CW for semi-breaking).

Can you help me to find it ?

Thanks for your reply,
Regard,
Eric ON4MIC
| 555|542|2003-07-27 20:47:16|parnold|Re: Atlas210x--> Digest Number 182|
My vote would be for a 20 meter early Sunday evening net. I'd be running a
barefoot 210X to a dipole.
Most any clear frequency would be OK with me. Picke someone with a big
amplifier for Net Control...

Paul KØSEP




Marc wrote:

--

"We fight not to enslave, but to set a country free, and to make
room upon the earth for honest men to live in." --Thomas Paine



[Non-text portions of this message have been removed]
| 556|542|2003-07-27 20:49:34|sasi nayar|Re: Atlas210x--> Digest Number 182|
Hi all
Some time around 1600Z on 20 m would be great. That is
when we have an opening to your part of the world. A
net controller on the West coast would be great for
us! Just some ideas..
73
Sasi
9V1SM
--- Erik Westgard <ewestgard@... ------------------------------------------------------------------------
________________________________________________________________________
________________________________________________________________________
________________________________________________________________________
________________________________________________________________________
________________________________________________________________________
________________________________________________________________________
=====
Amateur Radio For Global Peace and Fraternity
----------------------------------------------
Sasi Nayar, 9V1SM / VU3SNM,
Marine Biology Lab, Department of Biological Sciences
National University of Singapore,14 Science Drive 4
Singapore 117 543. Tel : (65) 6874 6867 URL:http://www.dbs.nus.edu.sg/lab/reef/SasiNayar.htm

__________________________________
Do you Yahoo!?
Yahoo! SiteBuilder - Free, easy-to-use web site design software
http://sitebuilder.yahoo.com
| 557|542|2003-07-27 22:41:18|Ben K8DIT|Re: Atlas210x--> Digest Number 182|
Atlas Mundo, The Sunday Atlas net will be at 14.329 at 2130 UTC. I will
call the Atlas Users net to air and wait for any responses. If there is a
net on frequency, it will wait till they are done. So you have about 40
minutes to process this info and get ur Atlas on air. Other rigs are
welcome.
| 558|542|2003-07-27 22:50:43|Marc|Re: Atlas210x--> Digest Number 182|
I am so glad someone finally grabbed the bull by the
horns!

I will be there ala Icom this eve. I almost feel
guilty...I am cooking dinner right now, so I don't
have time to get the 210 online.

Marc WR2I
--- Ben K8DIT <benk8dit@... __________________________________
Do you Yahoo!?
Yahoo! SiteBuilder - Free, easy-to-use web site design software
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| 559|542|2003-07-28 00:34:27|Ben K8DIT|Re: Atlas210x--> Digest Number 182|
Atlas, men of, The first net was held to bad conditions. In spite of this
one station in Miami checked in thru a relay W4/8R1W, Rudy in Miami was
almost heard by me. Next Sunday we'll try again. CU then.
| 560|542|2003-07-28 01:10:56|Marc|Re: Atlas210x--> Digest Number 182|
Someone heard me...I wasn't sure who it was......very
light here on the island of Manhattan.

Yes, the solar numbers were not in our favor.

Next time I shall be prepared with 210 online.

Marc WR2I
--- Ben K8DIT <benk8dit@... __________________________________
Do you Yahoo!?
Yahoo! SiteBuilder - Free, easy-to-use web site design software
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| 561|542|2003-07-28 06:20:16|RUDOLPH KING|Re: Atlas210x--> Digest Number 182|
Ben:- I should add that WR2I was also in there but you apparently did not
hear him he was about 4x4 here with me as was your signals also...
conditions were just bad let us hope that next Sunday will be better
Rudy King(W4/8R1W)
| 562|542|2003-07-28 07:52:20|Ben K8DIT|Re: Atlas210x--> Digest Number 182|
Rudy, r, cu all next Sunday 14.329.00 at 2130 utc. In the event of lousy
condx on ssb, CW
may be used to check in. GL.
| 563|563|2003-07-28 19:52:45|jt|net|
An unsanctioned net sounds good--Ive got just a dipole and a 215 but can get mid west readily on 20m depending on prop--see if i could stretch it to the east coast----havnt got my extra yet so have limited bandwidth--any way lets do it----sorry Roy--AA5FS--I didnt check my email in time for thr 2200GMT 14.329 contact the other day--thats noon local time here--Aloha--jt
J Thibadeaux
75FJ40-
NH7FJ
From the hill==

[Non-text portions of this message have been removed]
| 564|564|2003-07-28 21:44:42|roy|too much noise|
Listened on 329 till about 6:pm cdt but didn't hear anything but
qrn.It started here in oklahoma about 2pm cdt and got worse . I'll
try again next sunday maybe things will improve.
That's ham radio! 73's AA5FS roy
| 565|565|2003-07-28 21:54:17|RUDOLPH KING|Re: Atlas210x--> too much noise|
Roy:- the net was inaugurated last Sunday at 21:30 UTC on 14.329MHz by
K8DIT, however propagation conditions were terrible, and the net did not
last longer than possible 30 minutes. Conditions permitting another attempt
will be made next Sunday at the same time and frequency
Regards
Rudy King (W4/8R1W)
| 566|566|2003-07-29 02:35:09|Ben K8DIT|Re: Atlas210x--> net|
What is unsanctioned about gathering together on a frequency in a common
interest to any amateur about a particular radio?
You may have been thinking of impromptu which is more what the Atlas user's
net is.
Anyhoo, noon in Hawaii is not gonna be ez on 20meters, as I had learned
having lived in Kona myself for a couple of years. A directional antenna up
high would serve you well. Hope to c u there.
73
| 567|542|2003-07-30 00:38:28|rickskione@aol.com|Re: Atlas210x--> Digest Number 182|
Hi Ben,
Contrats on getting the net started. I hope conditions will improve for your
future attempts.
We talked a few months ago on land line about working on my 350.
If you are still interested I'd like to send it up to you.
It seems to be putting out plenty of power on 20, but there are a few other
problems that need attending.
1) Low receiver sensitivity.
2) Audio distortion in the transmitter output.
3) Frequency alignment.
I guess the old gal just needs some TLC from someone like yourself that
really knows what makes her tick.
Let me know if you're still in the business, and I'll box her and send her
your way.
Thanks, & 73s
K3EYJ/6, Rick in LA


[Non-text portions of this message have been removed]
| 568|542|2003-07-30 00:50:01|Ben K8DIT|Re: Atlas210x--> Digest Number 182|
Hi Rick, Well, I dont remember speaking with you. You may have me confused
with K8EYU, Glenn, who does fix Atlas radios. I couldnt fix one if my life
depended on it.
Glenn is out of town at the momemnt but is expected back shortly. If you
need his email or something let me know. He and I know one another because
he fixes my radios, all my radios. He does specialize in Atlas Radios
though.
I sold my 350XL and only have the 215X left of my Atlas radios. I got this
one on E bay for $80 and it needed new finals. I just own the xcvr and no
other Atlas gear at this time. cul
| 569|569|2003-08-01 21:26:49|LORNE GUSTAFSON|Low Power problem with 210X in service after 28 years|
I had my 210X stored in a Samsonite briefcase for 28 years and it
still looks like new; no dust or anything. It even smells new.

After sending my new Kenwood TS-2000 for repairs, I installed the
Atlas in my truck so I could try it out. I connected my original
Shure 404C hand-mike and High Sierra screwdriver and I found the
receiver is phenomenal; even better than my Kenwood! The receiver
didn't drift and the noise blanker took out all the ignition
noise
too. I'm so impressed. Why did I spend over $2,400 for the
Kenwood?

I made a few contacts on 20 meters and they reported that my audio
was distorted. I turned down the mic gain but I was concerned that I
was only peaking under 4 amps while transmitting. I connected an
SWR/power meter and I was only putting out ten (10) watts.

Does anyone have any idea where to start to identify this low-power
problem? I had hoped for 200 watts to show up on the meter. Not the
case.

Now that I'm thinking about it, I realize that I put this radio away
in 1975 because of low output and I blamed it on a poor match with a
Hustler mobile vertical in 1974. Maybe it wasn't the antenna. I
know the High Sierra is properly tuned.

Thanks,
Lorne, K8KQD
| 570|569|2003-08-01 22:13:18|Uwe Sievers|Re: Atlas210x--> Low Power problem with 210X in service after 28 ye|
Hi Lorne,
your problems looks like something is wrong with the bias voltage of your Power Amp...
what is your idling current?(... no modulation on ssb) ... the idling current should be
0,5A... if less you will run into high distortion... and in the worst case (no bias)
the output will go very low.... so please check the idling current and let us know the
results..
73 de Uwe DJ9XG



| 571|569|2003-08-04 22:02:31|roy|Re: Atlas210x--> Low Power problem with 210X in service after 28 ye|
--- In atlas210x-215x@yahoogroups.com, "Uwe Sievers" of your Power Amp...
idling current should be
worst case (no bias)
and let us know the
I
the
away
a
I think i may have the same problem as lorne.Not being the best
technition in the world would i check the current at the heat sink
following d501 to get the correct bias reading? i'm only putting out
10 watts on all bands also.I'll need all the help i can get.
thanks
roy aa5fs
| 572|569|2003-08-05 00:41:04|Ben K8DIT|Re: Atlas210x--> Low Power problem with 210X in service after 28 ye|
Both you guys may have the same problem, maybe not. The current protection
circuit may have failed or the might be a bias problem. Aging components
probably need to be brought back to spec. with the proper gear, an RF signal
gen. and a scope. You could have any number of problems. Get them repaired
by sending it to someone knowledgeable. Some techs can fix them so they can
never be fixed again. So do it right.
| 573|569|2003-08-05 22:20:33|Eric - ON4MIC|Re: Atlas210x--> Low Power problem with 210X in service after 28 ye|
Hi Dear Friends,

If it's your audio was distorted, you must decrease your ALC (beter is on 12h) and you use your MIC GAIN only for regulated the power.

73 de Eric ON4MIC
| 574|574|2003-08-05 22:29:11|Eric - ON4MIC|Remote CW transmit switch for Atlas transceivers|
Hi Friends,

I have a Atlas 210x. I use this TX only for CW mode.

I would make a "Remote CW transmit switch for Atlas Transceivers"

But, in my doc, the shematic picture and the text is mistake :+(

Page 8, the figure 2-1 use the pin 3 and 4 ... 8 and 9 from to "aux. socket"

And in the text, I find ...use the pin 1 and 4 from to "EXT. OSC. Socket"

Question: I use the pin 1 or 3 ? And I use Aux. Socket or EXT. OSC. Socket ?

Sorry for my poor english :+(

Thanks for your reply and 73's for all,
Best,
Eric ON4MIC



[Non-text portions of this message have been removed]
| 575|574|2003-08-07 00:11:26|ve3pyg@rac.ca|Re: Atlas210x--> Remote CW transmit switch for Atlas transceivers|
On 5 Aug 2003, at 22:29, Eric - ON4MIC wrote:

You are right the diagram is all wrong! The socket to use is the ext.
Osc socket at the top rear. The pinning is wrong, and when I tried
to set this circuit up I found a wire in the circuit diagram for the
210X was missing. I have since put it in and the remote switching
works.

The Atlas 210x is not really a cw rig. It has no RIT, so you must
make sure that the cw off set is correct or stations will come back
to you off frequency. I use a simple two stage audio filter in the
headphone lead to sort out the stations on cw.
Dr. David G. Stephenson, VE3PYG,
Merrickville, On. Canada: dstphnsn@....

"Happy the humble state of the scholar who retires from this malicious
world, and in the pleasant countryside, with modest table and board,
governs his life with God alone, and passes his days by himself,
neither envied nor envying." de Leon (under process by the Inquisition)
| 576|574|2003-08-07 00:53:44|K5HML - Harry|Re: Atlas210x--> Remote CW transmit switch for Atlas transceivers|
--- ve3pyg@... wrote:
http://us.click.yahoo.com/sO0ANB/LIdGAA/ySSFAA/9rHolB/TM
---------------------------------------------------------------------~
Hi, David,

Would you happen to have a corrected schematic or
documentation worked up? If you have it available,
we'd like to see what changes we have to make to
our 210X/215X manuals.

Thanks and 73,

Harry, K5HML
San Antonio, Texas


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| 577|574|2003-08-07 11:15:04|Eric - ON4MIC|Re: Atlas210x--> Remote CW transmit switch for Atlas transceivers|
Hi David,

Tks fer your reply :+)
Thus the text is good ? If I connect the wire to the pin 1, 4, 8 and 9 to the Ext Osc Socket that's ok ?

I use too a audio filter in the
headphone lead to sort out the stations on cw.

I have only one TX for HF in my shack and It's the Atlas 210x HI!

Regard,
73 de Eric ON4MIC
| 578|574|2003-08-07 23:02:19|ve3pyg@rac.ca|Re: Atlas210x--> Remote CW transmit switch for Atlas transceivers|
Sorry, after I realised the manual was garbage as far as the CW
switch was concerned I worked out what I needed to do without
keeping much of a record. I will have a look at what I built and see
if I can work backwards to the correct circuit.

It can be made to work. I wrote and blew a PIC microcontroller to
act as a simple keyer that included a line to operate the remote
key line as a sort of rather slow break in. To go from phone to cw
means plugging in three separate lines to the Atlas 210x.


Dr. David G. Stephenson, VE3PYG,
Merrickville, On. Canada: dstphnsn@....

"Happy the humble state of the scholar who retires from this malicious
world, and in the pleasant countryside, with modest table and board,
governs his life with God alone, and passes his days by himself,
neither envied nor envying." de Leon (under process by the Inquisition)
| 579|574|2003-08-08 01:28:24|ve3pyg@rac.ca|Re: Atlas210x--> Remote CW transmit switch for Atlas transceivers|
Atlas CW switch.

I checked my rig. Basically the TEXT of the manual is correct. Use
the ext osc socket and the pins described are correct. DO NOT
USE the AUX socket. Ignore the socket wiring in the circuit
diagram.

Two other points. The two jumpers normally wired across the Ext
osc socket still have to be connected, and when I tried this circuit I
found that the wire from pin one of the external oscillator socket
(CW offset) was missing in my rig. I had to wire it in to get the
oscillator to offset.

NOTE the Aux socket is used as a tag strip in the Atlas. That is
wires are connected to unused pins according to Atlas circuit
diagram. So be very careful when pluggiing anything into this
socket.

Hope this helps.


Dr. David G. Stephenson, VE3PYG,
Merrickville, On. Canada: dstphnsn@....

"Happy the humble state of the scholar who retires from this malicious
world, and in the pleasant countryside, with modest table and board,
governs his life with God alone, and passes his days by himself,
neither envied nor envying." de Leon (under process by the Inquisition)
| 580|580|2003-08-08 03:05:06|PEB JAG|Re: Atlas210x--> Digest Number 192|
Did we ever settle on a freq and time for an Atlas 210/215 net?
Dave
WB1CDG
San Antonio



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| 581|580|2003-08-08 06:40:09|Ben K8DIT|Re: Atlas210x--> Digest Number 192|
We have. Be there. 14.329.00 at 2230Z on Sundays. One station checked in an
Atlas and another with Ten Tec gear. Condx have been pretty bad the last two
weeks, so chances are this week will be good. CU there.
| 582|569|2003-08-08 17:14:08|Uwe Sievers|Re: Atlas210x--> Low Power problem with 210X in service after 28 ye|
Hi Roy,
the reading of the current can be done with the meter on the front panel... there should
be an indication for the current between the 0 and the 1st point on the upper scale...
every marking indicates 2 A... so the pointer of the instrument should move to the 30
percent between zero and first indicator... this is approx. 600mA..
Uwe
I think i may have the same problem as lorne.Not being the best
technition in the world would i check the current at the heat sink
following d501 to get the correct bias reading? i'm only putting out
10 watts on all bands also.I'll need all the help i can get.
thanks
roy aa5fs



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| 583|569|2003-08-09 00:10:15|roy|Re: Atlas210x--> Low Power problem with 210X in service after 28 ye|
Thanks Uwe.Thats good to know.I've been reading through the service
bulllitens downloaded from the files area and low output seems to be
a common problem.Setting the mike gain and alc might be the key.I
remember having trouble with the old hw202 but have forgotten how i
got it corrected.I'll just keep studying and reading the posts till i
figure it out.
thanks again,
Roy aa5fs

--- In atlas210x-215x@yahoogroups.com, "Uwe Sievers" panel... there should
the upper scale...
should move to the 30
out
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| 584|584|2003-08-09 15:16:58|Eric - ON4MIC|Atlas210x--> Remote CW transmit switch for Atlas transceivers THAT'|
Hi David,

Thanks you very much for your help !
Now all is ok !!

Here, the text is not all correct.

For the pin 4 and pin 9 it's ok.

But for the +13v it's in pin 7 and NOT in pin 8

And for the pin 1 you must go to "Aux. Socket" and take a pin 6

Now, I go to make a simple CW sidetone for my Atlas :+)

Regards,
Eric ON4MIC


| 585|585|2003-08-15 19:24:19|roy|low power and audio distortion solved|
I finally found the problem with the low power and distortion . Just
before i was ready to add the atlas 210 to the junk pile i took the
cover off one more time to check for burns or heat and noticed the
mobel mount didn't look quite right.Bought some bananna jacks and
hooked it up without the mobile mount and things were ok. Its always
the simple things that get you isn't it.
73's AA5FS roy
| 586|586|2003-08-15 23:06:29|wb2aze|voltages on Atlas PS-200|
Hello All, I have an 210x thats used as a backup radio only. I have
the external PS-200 power supply and would like to use it for
powering a tentec 555 scout. I measured the voltage from the 2
positive leads and came up with 2 different readings. One shows a
solid 12 vdc and the other is about 15 vdc with no loads on them. If
i combine both pos leads (in parallel as per the atlas manual) the
meter still shows 15vdc. Is there something wrong with the Power
supply? The radio works fine with it.

any help would be appreciated. thanks
| 587|587|2003-08-17 16:38:37|Peter Dalton|PC 600 questions ??|
Dear Group,

I have been working on my 210x again, some questions.

I have three (photo) copies of the manual for the Atlas 210/215 ranging
in date from 1975, 1976 and 1977, as dated on some of the circuit
diagrams.

On all the circuits I have for the PC600 CIO (Carrier Oscillator, Buffer
Amplifer) board there are two transistors and an input for the "T Line"
on the board ( amongst a number of other inputs to the board). The "T
Line" in my radio is a yellow wire (as per the main chassis wiring
diagram) however, there is no "T Line" going to the PC600 board in my
radio and I can only see one transistor on the PC600 (it is possible
that another transistor is hiding under the S-meter on the PC600 but I
have had a good look and can not see it). There are a number of vacent
holes on my PC600 board which have never been soldered, ie; the holes
are there but no components were ever installed.

My copies of the chassis wiring diagram show the "T Line" going to the
CIO board. From looking at the circuit it looks like the designers
wanted to vary the output of the CIO using the "T Line" as the switching
signal, so that there was a higher CIO output in the Tx mode.


So what do you think, no T Line and probably only one transistor, is
this a different factory version of the PC600 board or something I need
to fix ??



I am still looking for a few more db in the Tx chain and 20m is still a
few db down on the other bands in the Rx (yes, I have tuned the Rx and
Tx input filters). Next job is to build an RF probe for my DMM and start
to measure the injection levels into the mixers.

Regards,

Peter VK1XP
| 588|588|2003-08-22 22:37:22|Michael Efseaff|I wish to Join|
I'm following instructions. Here's my email.

Have Atlas 215X complete with AC supply. Rcve works well but no Xmit but there is idle current.

Mike, K6JSY


[Non-text portions of this message have been removed]
| 589|589|2003-08-25 08:41:32|BG Wennersten|Testing|
Testing
| 590|590|2003-08-25 15:58:41|John P.|Re: Atlas210x--> Digest Number 199|
Testing received loud and clear.
Anybody been able to get the weekly net going again? What time & freq.?

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| 591|590|2003-08-25 22:08:56|Ben K8DIT|Re: Atlas210x--> Digest Number 199|
John, At Sunday evening 2330utc on 14.329.00 for the last 3 weeks we have
been attempting to meet. Conditions have been abysmal each and every time.
So, we are looking for at least poor conditions, better than abysmal, in
order to take advantage of the 20 meter band's daytime propogation. cu
there, 73 Ben K8DIT
| 592|592|2003-08-29 15:52:18|BG Wennersten|AC Console|
I am looking for an AC Console for my 210x.
73 de
Goran,
Sweden
| 593|593|2003-08-30 06:39:55|Peter Dalton|Replacement for the RCA40582, Q503.|
Dear All,

A colleague has blown his RCA40582 (driver transistor Q503) and would
like any information on a cost effective replacement for this
transistor, he knows he can get a replacement from RFParts but would
like to know if there is a cheaper alternative. I thought that perhaps a
2SC1306 or a 2SC1307 (SSB CB final transistors) might do the job.

He also blew the final transistors however, I think perhaps a matched
set of MRF450's or MRF455's for this replacement.

What do you think ??

Any thoughts or experience from the group on these replacements would be
welcomed.

Regards,

Peter VK1XP
| 594|593|2003-08-30 13:45:46|Marc|Re: Atlas210x--> Replacement for the RCA40582, Q503.|
Peter,

The 1306 will require modiication of the board to
accomodate the TO-220 package. This is not a bad idea,
however the 2SC2075 is the better device here. I have
tested most of the CB finals in my 210 and found it to
be the better choice. I have wanted to try the 2sc799
but have not yet. This device is in the same case as
the RCA. 450's or 455's should work well in the final
stage. 454's also work, but the lower gain devices
seem to work better in the Atlas.

73,

Marc WR2I
--- Peter Dalton <pierre@... __________________________________
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| 595|595|2003-09-01 18:26:12|PEB JAG|Re: Atlas210x--> Digest Number 201|
BG Wennersten;

I had to buy a whole station - rig AND console - just to get the console. I looked for YEARS for just a console and couldn't find one. I bought both out of necessity (Atlas 215 plus console) and sold the rig, leaving me with a console for my 210x. You may end up doing the same thing. There were a lot more rigs sold than consoles, so the numbers don't match, it seems.

Good luck!

- Dave WB1CDG (formerly 7J6CCH)



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| 596|595|2003-09-02 05:00:55|Erik Westgard|Re: Atlas210x--> Digest Number 201|
I have a console here. It's in good shape. For some reason the audio does
not go through the connector to the rig. It is a really simple problem I
think.

I would like to trade it for a clunker 210x- I just need a final amplifier
board assembly, in about any shape, as I have a working rig missing only
that.



-----Original Message-----
From: PEB JAG [mailto:pebjag@...]
Sent: Monday, September 01, 2003 11:25 AM
To: atlas210x-215x@yahoogroups.com
Subject: Re: Atlas210x--



BG Wennersten;

I had to buy a whole station - rig AND console - just to get the console. I
looked for YEARS for just a console and couldn't find one. I bought both
out of necessity (Atlas 215 plus console) and sold the rig, leaving me with
a console for my 210x. You may end up doing the same thing. There were a
lot more rigs sold than consoles, so the numbers don't match, it seems.

Good luck!

- Dave WB1CDG (formerly 7J6CCH)



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| 597|595|2003-09-02 06:44:28|BG Wennersten|Re: Atlas210x--> Digest Number 201|
Tnx. Would have been a great trade. However, the only 210x I have right now is brand new and never used. Will keep my eyes open to see if I can find one. Anyone out there?
file://Goran


| 598|595|2003-09-02 06:48:00|Jim|Re: Atlas210x--> Digest Number 201|
Yep. I have a junk 210x and want a console. But I'm in Australia :(
Cheers
Jim
| 599|599|2003-09-16 16:25:47|BGWennersten|MT-1 |
I have been searching for the Atlas antenna transformer MT-1, which
could be very useful (even necessary) with the mobile whip-antenna.
No luck.

Now I am almost ready to build my own. How? Anybody in the know?
Maybe even some of you have already a practical solution of this
matching dilemma?
Goran
Sweden
| 600|600|2003-09-17 15:37:43|John P.|Sloper Antenna on a 215?|
Has anybody had any luck using an Alpha-Delta DX-B "Sloper" Antenna with an
Atlas 215? I can only get about 2 miles on 80 meters, so what's up with that?

73's
John

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| 601|601|2003-09-17 16:12:32|Ben K8DIT|Re: Atlas210x--> Sloper Antenna on a 215?|
John, Two miles is about right. Your 215 is working properly at this time.
There is this morning a radio blackout due to high solar winds with an
aurora level of 10 along with an A index of 30 plus.
Sigs on 75 meters are way down and I hear noone on the air with my non Atlas
radio with an inverted L 70' up at the apex. Normal activity in the morning
is not happening and won't until this solar storm passes. So dont blame your
Atlas or your ant. unless you had the same results last night when the band
was ok til about 9pm. Pacific time.
| 602|602|2003-09-17 21:58:13|José V. Gavilá|Carrier null in a 210x ?|
Hello!

Please, could somebody tell me where is the carrier null adjustment
in this rig?. Any hint about this adjustment?

Thanks!

JOSE

----------------------------------------------------------------------
73 EB5AGV / EC5AAU - JOSE V. GAVILA
La Canyada - Valencia (SPAIN)

Vintage Radio: http://jvgavila.com
Vintage Test Equipment: http://jvgavila.com/testeq.htm
| 603|602|2003-09-17 22:05:58|Marc|Re: Atlas210x--> Carrier null in a 210x ?|
It is the trimmer cap and trimmer resistor on either
PC100 or PC120. Standard alignment procedure for that
in online manual in the files of this group.

Marc
--- Jos� V. Gavil� <eb5agv@... ----------------------------------------------------------------------
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| 604|604|2003-09-29 19:27:37|Bill|Atlas 180|
G'day everyone. Could someone please write back with a short and
succinct description of the differences between the Atlas 180 and
Atlas 210 ?? I know that they should be fairly similar.... what
are the differences? Would you guys in the know please let me know
promptly because there is an Atlas 180 on ebay at the moment for a
good price. I just don't want to 'throw away good money after bad'.
I would prefer a 215X, but that will have to wait until the right
deal comes along. I would just like to get active in HF mobile and
the deal right now looks good.

Thanks in advance and 73, Bill K4WWD
| 605|604|2003-09-29 19:27:37|Bill|Atlas 180|
G'day everyone. Could someone please write back with a short and
succinct description of the differences between the Atlas 180 and
Atlas 210 ?? I know that they should be fairly similar.... what
are the differences? Would you guys in the know please let me know
promptly because there is an Atlas 180 on ebay at the moment for a
good price. I just don't want to 'throw away good money after bad'.
I would prefer a 215X, but that will have to wait until the right
deal comes along. I would just like to get active in HF mobile and
the deal right now looks good.

Thanks in advance and 73, Bill K4WWD
| 606|604|2003-09-29 19:37:09|Uwe Sievers|Re: Atlas210x--> Atlas 180|
Hi Bill,
the major difference is atlas 180 covers 160-20m
215x covers 160-15m and 210X covers 80-10m
all other components are more or less comparable... you can even swap the internal
plugin boards among these radios... in older atlas 180 the PC100 board is different, but
on later units they are the same... the latest 215x and 21x have a different IF older ones
have 5520khz , newer ones 5640khz as the IF... everything els
| 607|604|2003-09-29 19:37:09|Uwe Sievers|Re: Atlas210x--> Atlas 180|
Hi Bill,
the major difference is atlas 180 covers 160-20m
215x covers 160-15m and 210X covers 80-10m
all other components are more or less comparable... you can even swap the internal
plugin boards among these radios... in older atlas 180 the PC100 board is different, but
on later units they are the same... the latest 215x and 21x have a different IF older ones
have 5520khz , newer ones 5640khz as the IF... everything els
| 608|604|2003-09-29 19:37:09|Uwe Sievers|Re: Atlas210x--> Atlas 180|
Hi Bill,
the major difference is atlas 180 covers 160-20m
215x covers 160-15m and 210X covers 80-10m
all other components are more or less comparable... you can even swap the internal
plugin boards among these radios... in older atlas 180 the PC100 board is different, but
on later units they are the same... the latest 215x and 21x have a different IF older ones
have 5520khz , newer ones 5640khz as the IF... everything els
| 609|604|2003-09-29 19:37:09|Uwe Sievers|Re: Atlas210x--> Atlas 180|
Hi Bill,
the major difference is atlas 180 covers 160-20m
215x covers 160-15m and 210X covers 80-10m
all other components are more or less comparable... you can even swap the internal
plugin boards among these radios... in older atlas 180 the PC100 board is different, but
on later units they are the same... the latest 215x and 21x have a different IF older ones
have 5520khz , newer ones 5640khz as the IF... everything els
| 610|604|2003-09-29 19:27:37|Bill|Atlas 180|
G'day everyone. Could someone please write back with a short and
succinct description of the differences between the Atlas 180 and
Atlas 210 ?? I know that they should be fairly similar.... what
are the differences? Would you guys in the know please let me know
promptly because there is an Atlas 180 on ebay at the moment for a
good price. I just don't want to 'throw away good money after bad'.
I would prefer a 215X, but that will have to wait until the right
deal comes along. I would just like to get active in HF mobile and
the deal right now looks good.

Thanks in advance and 73, Bill K4WWD
| 611|604|2003-09-29 19:37:09|Uwe Sievers|Re: Atlas210x--> Atlas 180|
Hi Bill,
the major difference is atlas 180 covers 160-20m
215x covers 160-15m and 210X covers 80-10m
all other components are more or less comparable... you can even swap the internal
plugin boards among these radios... in older atlas 180 the PC100 board is different, but
on later units they are the same... the latest 215x and 21x have a different IF older ones
have 5520khz , newer ones 5640khz as the IF... everything els
| 612|604|2003-09-29 19:37:09|Uwe Sievers|Re: Atlas210x--> Atlas 180|
Hi Bill,
the major difference is atlas 180 covers 160-20m
215x covers 160-15m and 210X covers 80-10m
all other components are more or less comparable... you can even swap the internal
plugin boards among these radios... in older atlas 180 the PC100 board is different, but
on later units they are the same... the latest 215x and 21x have a different IF older ones
have 5520khz , newer ones 5640khz as the IF... everything els
| 613|604|2003-09-29 19:37:09|Uwe Sievers|Re: Atlas210x--> Atlas 180|
Hi Bill,
the major difference is atlas 180 covers 160-20m
215x covers 160-15m and 210X covers 80-10m
all other components are more or less comparable... you can even swap the internal
plugin boards among these radios... in older atlas 180 the PC100 board is different, but
on later units they are the same... the latest 215x and 21x have a different IF older ones
have 5520khz , newer ones 5640khz as the IF... everything els
| 614|604|2003-09-29 19:37:09|Uwe Sievers|Re: Atlas210x--> Atlas 180|
Hi Bill,
the major difference is atlas 180 covers 160-20m
215x covers 160-15m and 210X covers 80-10m
all other components are more or less comparable... you can even swap the internal
plugin boards among these radios... in older atlas 180 the PC100 board is different, but
on later units they are the same... the latest 215x and 21x have a different IF older ones
have 5520khz , newer ones 5640khz as the IF... everything els
| 615|604|2003-09-29 19:37:09|Uwe Sievers|Re: Atlas210x--> Atlas 180|
Hi Bill,
the major difference is atlas 180 covers 160-20m
215x covers 160-15m and 210X covers 80-10m
all other components are more or less comparable... you can even swap the internal
plugin boards among these radios... in older atlas 180 the PC100 board is different, but
on later units they are the same... the latest 215x and 21x have a different IF older ones
have 5520khz , newer ones 5640khz as the IF... everything else is comparable... again
the 180 covers only 160m, 80m (3,5-4Mhz), 40m and 20m.
73 de Uwe DJ9XG


| 616|604|2003-09-29 20:33:52|Marc|Re: Atlas210x--> Atlas 180|
The "X" series have many circuit improvements over the
180-210. I would suggest you look for one of those if
you don;t plan on redesign.

Marc WR2I
--- Uwe Sievers <uwsievers@... __________________________________
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| 617|604|2003-09-29 20:55:52|Uwe Sievers|Re: Atlas210x--> Atlas 180|
My view is that the X-series have some minor changes on the boards... you can bring
even the oldest boards to the newest factory levels... I own all version of these radios...
the most significant changes are on the PC300 board in the agc level generation... all
the other changes are not so important... so if you want to buy a 180 you will not have
major deviations in the performance compared to the latest 210X models... only the
bands are quite different as I wrote befor.
73 de Uwe DJ9XG


| 618|604|2003-09-29 21:10:50|Marc|Re: Atlas210x--> Atlas 180|
The changes were significant enough to warrant
looking for the "X". VFO is different, chassis wiring
is different in IF signal path in regard to accessory
use on the AUX jack as well as power are different.
Image filtering added on the X, easier access TX and
RX filters on X, serviceable XTAL calibrator on X.....

Need I say more?

I have both 210 and 210X early and late.
--- Uwe Sievers <uwsievers@... __________________________________
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| 619|604|2003-09-29 22:39:57|Uwe Sievers|Re: Atlas210x--> Atlas 180|
Hi Marc,
what are the benefits of these "minor" changes... I said it already, I have all versions
here in my shack and if I compare the oldest one from an very early 180 to the latest
210X with version D boards I can tell you nearly all changes are next to nothing... I,m
wondering about your statement of easier access of the tx and rx filters..... the latest
version has on the tx filter board the capacitors made accessable from the top... but
again what does it really improve? Before there was no need to adjust these very broad
filters and now is no more need to do it and in the Atlas service bulletins is recommending ,
if necessary, to use a special adapter for the the PC100 board... this adapter will work
from 180 to 210X... so from my point if someone can get an affordable older version
he/she should buy it and install some of the changes Atlas made during the production
time...

best 73,s Uwe DJ9XG

| 620|604|2003-09-29 23:20:59|Marc|Re: Atlas210x--> Atlas 180|
If he/she decides to use a 206 VFO with a 180 or 210
it will not work properly. From a servicing
standpoint, the 180/210 is a nightmare compared to the
"X".

Yes the "X" is easier to service due to component
placement access issues. So where does one go to buy
the "special" adapter? Last time I checked, Atlas
Radio no longer exists.

Marc WR2I
The Radio Clinic of NYC
High Performance radio sales/service

--- Uwe Sievers <uwsievers@... __________________________________
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| 621|604|2003-09-30 09:03:40|Uwe Sievers|Re: Atlas210x--> Atlas 180|
Hi Marc,
who has the 206 VFO? How many had ever been sold?
How often has you to do service on the TX filter board? How often have you to
work on the 100Khz calibrator... the external crystal oscillator 10XB is running fine even
on the oldest 180.... but I think we should close this discussion... if someone is looking
for an Atlas he/she should only look to the bands and the condition of the radio.
best 73,s Uwe DJ9XG


| 622|604|2003-09-30 11:34:11|Marc|Re: Atlas210x--> Atlas 180|
I own two 206's (serial numbers 294 and 299), I had to
redesign the xtal cal in my 210 etc;.

Would I do it again? No way. I will never buy a 180 or
210. The "X" is much easier to work on. Besides, I saw
the rig on eBay, it is not a bargain. It is $200 with
console. I spent less than that on my pristine late IF
210x with console.


--- Uwe Sievers <uwsievers@... __________________________________
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| 623|623|2003-09-30 14:51:12|John P.|215 into 210X?|
Atlas people:
Do you think that it's worth the effort to take all the working boards and PA
from a working 215 (non-X) and install them into a non-working 210X in order to
get the better filtering etc? They both have the same I.F.

Suggestions?

73's
John


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| 624|623|2003-09-30 14:59:34|Uwe Sievers|Re: Atlas210x--> 215 into 210X?|
Hi John,
it,s no problem to do this... the result is a nice 210X... the only parts you cannot swap
are the filter boards (RX-filter, TX-Filter and the low pass filter in the PA compartement).
All the other boards (PC100, PC200 , PC 300,PC500 and PC600) will fit into the 210X.
73 and good luck Uwe DJ9XG

| 625|623|2003-09-30 16:37:42|Marc|Re: Atlas210x--> 215 into 210X?|
John,

I would say yes to a degree. PA yes, plug in cards,
no. I would fix any problems on the 210X cards.
However, I would update the old cards by copying the
mods from the newer cards.
--- "John P." <toledohamradio@... __________________________________
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| 626|626|2003-09-30 23:21:15|Hans J. Wuest|Atlas 210 data|
I would like to compare the data of my proven Atlas 210X with newer
devices. Who knows the data as blocking dynamic rank, third order IMD
dynamic rank, third order intercept, SSB carrier suppression,
undesired sideband suppression, a.s.o.?
73
Hans, HB9OI / AD5DK
Berne, Switzerland
| 627|626|2003-10-01 00:54:43|Marc|Re: Atlas210x--> Atlas 210 data|
210/215x

MDS=-120 dBm
BDR=123dB
IMD DR=76 dB

That's all I have.......

Marc WR2I
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| 628|628|2003-10-01 01:57:55|wb6rlg_bwmrc.com|210X IFs|
Can anyone tell me how to identify the IF on my 210X from my serial number.

73
wb6rlg


[Non-text portions of this message have been removed]
| 629|628|2003-10-01 02:36:04|Marc|Re: Atlas210x--> 210X IFs|
There is a long list of "T#" prefixes. The easiest
way is to remove the top cover and read the frequency
off of the crystal filter, which is behind the VFO
under the tuning drum.

Marc WR2I
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| 630|628|2003-10-01 03:49:23|wb6rlg_bwmrc.com|Re: Atlas210x--> 210X IFs|
Ahh yes and I worked for atlas and looked at many of them well its been a long time

Thanks for shaken my brain loose.. I am in the process of replacing all my Atlas gear I had everything Herb made. Wow I miss that stuff..

73
WB6RLG
| 631|628|2003-10-01 15:01:50|Marc|350XL tech bulletins|
Hi,

I am chasing problems in a 350XL I bought recently.
Anyone have access to tech bulletins for this rig?

Thanks,

Marc WR2I

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| 632|628|2003-10-01 15:10:40|Mark Hill|Re: Atlas210x--> 210X IFs|
I believe that TP series units plus one other serial number (TO?) range
have the 5645 kHz IF.

(In one of the later manuals, this is mentioned in I think the section
which talks about calculating xtal frequencies for the plug-in external
oscillator).

Perhaps you can detect the carrier oscillator on an external receiver to
save having to take the top off!?

Regards.

Mark.
-----------------------------------------------------
At 17:36 30/09/2003 -0700, Marc wrote:


*********************************************
Mark Hill - G4FPH
E-mail: g4fph@...
Radio web site: www.g4fph.freeserve.co.uk

Dipoles resonant on 1940/3760/7060 kHz
2 ele delta loop beam on 14180 kHz
*********************************************
| 633|633|2003-10-02 09:34:26|Mark Hill|Improve your Atlas?|
Folks,

For a little while now I have been working on a project for my own Atlas
that I think may be of interest to other owners.

I have designed and built a combined digital frequency display and 'huff
and puff' type VFO stabiliser. The project is based around a low cost PIC
micro controller IC and a 16 character by 2 line LCD display. The
frequency readout is to 10 Hz resolution and the stabiliser aims to keep
the VFO stable to plus or minus 10 Hz (I'm still finalising the software
for the stabiliser part).

I have two ideas for implementation in mind:

1. A small external unit, including frequency readout, which connects to
the external oscillator socket when required. When not required, a dummy
plug is inserted in the socket. A push button on the external unit
switches lock function on and off (an LED indicator is provided).

2. A cut-down version for mounting internal to the Atlas supporting only
the VFO stabiliser function. The 'lock enable' button would mount in the
NB control hole on the front panel (I do not have the NB option), or
elsewhere according to user choice (could perhaps use the DIM switch or SB
selector switch). Lock LED might be added in the corner of the frequency
dial window. Another alternative to the LED could be to increase the
brightness of the dial lamps when locked!

In both cases, it is necessary to modify the Atlas internally slightly by
adding a varicap diode to allow the stabiliser to drive the VFO frequency
up and down a little.

I am wondering whether there might be sufficient interest from the group to
make a small run of one or both units on a commercial basis? I would be
interested in responses from those on the group to gauge possible interest
/ numbers.

Regards.

Mark.
*********************************************
Mark Hill - G4FPH
E-mail: g4fph@...
Radio web site: www.g4fph.freeserve.co.uk

Dipoles resonant on 1940/3760/7060 kHz
2 ele delta loop beam on 14180 kHz
*********************************************
| 634|634|2003-10-02 11:00:23|Andy McFarlane|Re: Atlas210x--> Improve your Atlas?|
Mark

I'd say if you can improve on the Stateside product put out by www.aade.com and include the superb service
provided, then by all means GO FOR IT. I have a 210X with illuminated readout built-in similar to a pic on
http://www.aade.com/Applic~1.htm#Atlas210

Ciao de Andy
ZL3JL

FAILURE IS NOT AN OPTION. It comes bundled with Windoze.
| 635|634|2003-10-02 14:27:38|RUDOLPH KING|Re: Atlas210x--> Improve your Atlas?|
Hello Mark:- further to your recent e-mail , my feelings are that there are
already available a number of relatively low priced Digital Frequency
readouts capable of being installed in the Atlas series radios, so why
re-invent the wheel? However the circuit for stabilizing the VFO circuit
should be a winner
Rudolph N. King


| 636|636|2003-10-03 14:51:33|John P.|Display Kit?|
wrote..." I have designed and built a combined digital frequency display and
'huff and puff' type VFO stabiliser."

This would be pretty slick, but I don't know if you could fit it into the $50
price that another kit offers, or $70 assembled.

73's
John

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| 637|637|2003-10-04 23:47:11|Mark Hill|Digital Display / Huff and Puff for Atlas|
Folks,

Many thanks to all those who responded to my enquiry re. digital display
and huff and puff for the Atlas.

It seems as if there are already a few commercial digital display units out
there than will work with the Atlas radio and mount internally or
externally. Thus it seems more of you would be interested in the huff and
puff stabiliser part of my design than the digital frequency
display. Looking inside my 210x, I think that a unit can be made small
enough to mount between the speaker magnet and the rear of the external
oscillator connector.

I will finish the software for the combined unit, then strip the design
back to a huff and puff only for mounting internal to the Atlas. I have
also thought of a possible way of avoiding the need for a push button to
lock and unlock the frequency control. This could make the VFO
stabilisation fully automatic, but I need to try this in software before
getting too carried away.

I'll keep the group informed as to developments.

Regards.

Mark.
*********************************************
Mark Hill - G4FPH
E-mail: g4fph@...
Radio web site: www.g4fph.freeserve.co.uk

Dipoles resonant on 1940/3760/7060 kHz
2 ele delta loop beam on 14180 kHz
*********************************************
| 638|638|2003-10-04 23:57:25|PEB JAG|Re: Atlas210x--> Digest Number 209|
Who makes this $50 kit, is it any good, and where is it available?
Thanks,
- Dave
WB1CDG


Message: 1
Date: Fri, 3 Oct 2003 05:51:31 -0700 (PDT)
From: "John P."
Subject: Display Kit?

wrote..." I have designed and built a combined digital frequency display and
'huff and puff' type VFO stabiliser."

This would be pretty slick, but I don't know if you could fit it into the $50
price that another kit offers, or $70 assembled.

73's
John


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[Non-text portions of this message have been removed]
| 639|639|2003-10-07 01:45:23|maritimus49|Preamp and VFO mod|
Hello Everyone -
I am expecting a very fine 210X with NB at the end of next week. I
was wondering what the general consensus is on the need to add a
preamp to this model? What preamp mod is the best? I remember reading
one comment of a 210X owner who said that a preamp didn't add much
gain even on 10 meters. However, others seem to feel that a preamp is
a good idea. I agree with many of you that the Atlas rigs may not be
the cutting edge of technology but they are appreciated because you
can work on them, something that I would be very reluctant to do to
an Icom 718 that I once used.
I am also interested in the VFO stabilzer mod that is being
developed but I will need to get the 210X on the air and see how
much, if any, that it drifts.
I have never owned an Atlas and I'm really looking forward to getting
it next week. I also like this group and the obvious enjoyment you
are having at making these rigs do their best.

73,
Bruce K6RQR
| 640|640|2003-10-07 02:52:13|Rick McKee|Re: Atlas210x--> Preamp and VFO mod|
Just remember, a preamp will also amplify things you don't want it to !
Such as noise !

72/73 de: Rick McKee, KC8AON < SW 40+, SW-20+, Norcal BLT, Norcal Cascade, Yaesu FT-7,
Homebrew 6V6 tube TX & Hallicrafters SW500 RX
QRP-L #2112, FPqrp #33, AR QRP, AmQRP, Ohio Valley Fists
I'll give up CW when I'm dead ! MAYBE !

On Mon, 06 Oct 2003 23:45:19 -0000 "maritimus49" <maritimus49@... writes:
________________________________________________________________
The best thing to hit the internet in years - Juno SpeedBand!
Surf the web up to FIVE TIMES FASTER!
Only $14.95/ month - visit www.juno.com to sign up today!
| 641|639|2003-10-07 10:31:08|Uwe Sievers|Re: Atlas210x--> Preamp and VFO mod|
Hi Bruce,
the need of a preamp is really questionable... my experiences are that you will not hear
more signals with a preamp... but weak signals are louder... the disadvantage is, if you
do not make it switchable, your IP figures will go down... so if you have the feeling that
you need one, then install one witch an on/off switch... with this you will have all
opportunities...
73 de Uwe DJ9XG


| 642|642|2003-10-13 23:24:22|Mark Hill|Display / stabiliser update|
Folks,

V1 prototype is now complete and working (see attached).

The stabiliser works so well that I can't measure any drift at all
now! There must still be some - I plan to tune in the xtal calibrator in
and use an audio spectrum analyser program to take a look when I get some time.

One problem that has reared its head during operational testing that
someone out there with a warm scope and counter might be able to help me
solve (I'm out of the shack on business at present): When going from RX to
TX (and vice versa), the Atlas VFO frequency appears to jump by 50 - 150 Hz
and then (almost instantly without the stabiliser) revert back to where it
was. Unfortunately the counter sees this apparent change and (with the
stabiliser locked) the huff and puff takes action to correct the
'drift'. This it does over a period of a few seconds. This gives an
interesting effect on RX and (to the outside world) on TX too!

Question is: Is this shift in VFO frequency real (change in oscillator
loading during switching) or just some sort of spike superimposed on the
VFO output by the oscillator switching circuitry?

(At present, I am taking the input to my counter / stabiliser from the link
on the external oscillator socket. I could of course move the pick up
point back nearer the oscillator transistor itself; add another buffer
after the VFO; or take in the KEY line to the stabiliser and ignore
frequency jumps during the changeover....)

Assistance with this one appreciated.

Regards.

Mark.

----------

*********************************************
Mark Hill - G4FPH
E-mail: g4fph@...
Radio web site: www.g4fph.freeserve.co.uk

Dipoles resonant on 1940/3760/7060 kHz
2 ele delta loop beam on 14180 kHz
*********************************************

[Non-text portions of this message have been removed]
| 643|643|2003-10-14 09:01:02|BGWennersten|PC board adapters|
I´m abt to make a couple of PC board adapters (one straight, one
right angle) for my 210X. It seems to be a rather straight forward
thing to do, however I´d like to hear from you if you have already
made your own adapters (or even have the Atlas original adapters).
73,
Goran
| 644|643|2003-10-14 10:14:21|Uwe Sievers|Re: Atlas210x--> PC board adapters|
Hi Goran,
it,s a great idea to make these adapters.... for many puposes you have no chance to
make adjustments or measurements on the pc -boards... so if you make these please
let the group paricipate on your progress... if you make them as a printed circuit board
please put the layout into the files session here.
I made one years ago to have access to the PC-900 board... but this was only
handwired.
73 de Uwe DJ9XG


| 645|642|2003-10-14 10:23:15|Uwe Sievers|Re: Atlas210x--> Display / stabiliser update|
Hi Mark,
I have heard about VFO shifting problems from other owners, too... but my experience is,
that this is not a general problem..... from one ham I know he has installed an additional
buffer amp beteeen the VFO and the RX Mixer to avoid this. I had owned up to 8
transceivers and no one of mine had this problem... the only problem I had was on one
unit a poor ground from the VFO board to the main chassis because of poor soldering...
the result was a random jumping of the vfo - frequency.
May be otheres in the group have more infos.
73 de Uwe DJ9XG

| 646|646|2003-10-14 12:52:21|Jose V. Gavila|Need crystal filter|
Good morning,

I am in need of a crystal filter for my 210x. It is of the 5645kHz type.

Please, could you help me?

Thanks!

JOSE
----------------------------------------------------------------------
73 EB5AGV / EC5AAU - JOSE V. GAVILA
La Canyada - Valencia (SPAIN)

Vintage Radio: http://jvgavila.com
Vintage Test Equipment: http://jvgavila.com/testeq.htm
European Boatanchors List: http://groups.yahoo.com/group/euro_ba_swap
| 647|647|2003-10-14 15:26:01|John P.|Who's "The Fixer?|
Hello Atlas Group:
What is the contact information for the ham out West that worked for Atlas that
repairs Atlas rigs?
Thanks,
John K8DAD

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| 648|648|2003-10-14 16:46:47|Ben K8DIT|Re: Atlas210x--> Who's "The Fixer?|
The ham who has fixed them for decades and advertises fixing them in
Worldradio and Qst is
K8EYU, Glenn in Wa. state.
gcf@...
| 649|649|2003-10-19 17:39:33|PEB JAG|Re: Atlas210x--> Digest Number 213|
There's a guy in our Atlas group here who repairs them, too:
Marc WR2I
The Radio Clinic of NYC
High Peformance radio sales/service
646-295-4085
...although I haven't had him repair any of my stuff to date, he's given me some good hints and tips!

Who else repairs Atlas rigs? We might as well compile a complete list have it on hand when this question recurs...

- Dave
WB1CDG


atlas210x-215x@yahoogroups.com wrote:
3. Re: Who's "The Fixer?
From: "Ben K8DIT"

Date: Tue, 14 Oct 2003 07:47:27 -0700
From: "Ben K8DIT"
Subject: Re: Who's "The Fixer?

The ham who has fixed them for decades and advertises fixing them in
Worldradio and Qst is
K8EYU, Glenn in Wa. state.
gcf@...


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| 650|650|2003-10-20 18:53:27|Douglas|Atlas 350PS Schematic|
I recently picked up the deluxe version of the Model
350-PS power supply for my 350XL.

This is the version that has the built-in clock/timer
and phone patch.
Does anyone have or has anyone even seen a schematic
for the clock/timer/phone patch unit?

tnx,

Doug/WA1TUT

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| 651|651|2003-10-20 23:42:00|Dean Hemphill|New 10m dial strips, 28.0 - 29.0|
Improve the usability of your 210x on the 10m band!

Dennis, N6KI, has a VERY limited quantity (about 15 or so)
of replacement 210x VFO dial strips that have the 10m band
recalibrated to read from 28.0 to 29.0 MHz (as opposed to
the stock calibrations of 28.4 to 29.4 MHz). These strips
look for all the world like a factory Atlas part. I have
installed one on my 210x and it truly looks like it came
that way. The VFO is easy to recalibrate to match.

The price is US$10.00 per strip, plus postage. Dennis has
authorized me to post this info to the group. He points
out that once these are gone, there will be no more, so if
you want one, you'd better act quickly.

Contact Dennis, N6KI, directly at n6ki_73@...

Do NOT contact me!

73,
Dean K5DH
| 652|652|2003-10-20 23:47:31|Dean Hemphill|Seeking some Atlas parts|
I'm looking for the following parts
to bring a 210x back from the dead:

Knobs for VFO, Dial Set, and Band switch
VFO dial window with red indicator line
Complete PA unit in working condition

Please contact me at: k5dh@...

Thanks and 73,
Dean K5DH
| 653|653|2003-10-20 23:53:18|Dean Hemphill|Sell/trade: Braille VFO dial for 210x|
Sell/trade: scarce factory Braille VFO dial conversion parts
for 210x. Consists of a Braille dial strip and a machined-out
dial window which allows the visually-impaired op to feel the
Braille on the dial strip. Great condition. Removed from my
own 210x when I converted it back to non-Braille and added one
of N6KI's new dial strips.

Will sell for $20.00 cash, or trade for parts I need (I'll add
cash if necessary to make up the difference):

- Knobs for VFO, Dial Set, Band switch
- VFO dial window with red indicator line
- Complete PA unit in working condition

Contact me at: k5dh@...

73,
Dean K5DH
| 654|651|2003-10-20 23:56:20|Marc|Re: Atlas210x--> New 10m dial strips, 28.0 - 29.0|
The pattern for the dial is here in the files section
for anyone to make on their printer. FREE!
--- Dean Hemphill <k5dh@... __________________________________
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| 655|655|2003-10-21 04:21:58|jimmythefed|Atlas 210M?|
OK... so there's the 210, 210X, 215, and 215X... I've seen mention of
a 210M. Anybody know?
| 656|655|2003-10-21 14:43:34|Marc|Re: Atlas210x--> Atlas 210M?|
The 180M and 210M covered MARS.
--- jimmythefed <jimmythefed@... __________________________________
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| 657|651|2003-10-22 00:19:11|Dean Hemphill|Re: Atlas210x--> New 10m dial strips, 28.0 - 29.0|
Yeah, but most of us don't have the capability to print
onto plastic, only onto paper. The strips that Dennis
has for sale are plastic, just like the original part.

It was worth the ten bucks to me.

73,
Dean K5DH


| 658|658|2003-10-22 22:49:52|Joseph Calzaretta|Re: Atlas210x + 10 meters|
I have an Atlas 210X. How do you extend the transmit
and receive range to cover 28 - 29+ MHz ?
Thanks, Joe,K4LL joeec_57@...


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| 659|658|2003-10-22 23:14:52|Marc|Re: Atlas210x--> Re: Atlas210x + 10 meters|
adjust the trimmer located on the VFO enclosure with a
freq counter.

Marc WR2I
--- Joseph Calzaretta <joeec_57@... __________________________________
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| 660|655|2003-10-23 01:27:28|peter oesterle|Re: Atlas210x--> Atlas 210M?|
Look on ebay ther is a photo of one. Looks as though it starts at 3.7
mhz .
73n Pete


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| 661|661|2003-10-28 01:39:23|Dean Hemphill|Need help with 220-CS console|
I have acquired two 220-CS consoles. Both have been
cannibalized and modified for who-knows-what purpose.
I hope to rebuild one to original condition. I need
to see some overall and detail photos of the insides,
and I could use a complete parts list. I downloaded
a schematic so I should be able to build a clone of
the original p/s. Fortunately, the power/mic/spkr
connector mounting blocks came with both units and
they are usable. Not so with the antenna/key blocks;
both are missing.

I could also use schematic/parts list/layout for the
optional VOX circuitry. One of the consoles had it
at one time, but it's all gone now.

All help appreciated!

73,
Dean K5DH
| 662|662|2003-11-11 19:50:11|John P.|Power Supply?|
What is the recommended power supply current required to properly drive an
Atlas 210 / 215? 12AMPs / 14AMPs peak enough, or do you need more?

73's
JP

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| 663|662|2003-11-12 00:38:33|Marc|Power Supply?|
You need MO. You need mo voltage for the PA devices
too. Like regulated 13.8 VDC @ 2-4 amps for the radio
ckts and 17-18 VDC @20 amps unregulated for the PA
output devices. This is assuming you have a properly
tuned working 210/215(X)

Marc WR2I
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| 664|664|2003-11-12 01:02:46|Rick McKee|Re: Atlas210x--> Power Supply?|
There is a schematic for a power supply that I built for the 210X on the
website. It is very similar to the original Atlas power supply and
worked well for me. It use an LM317 adjustable regulator for the low
current circuit and the hi current side is fed direct. Look for the
power supply schematic ATLASPWRSUP.jpg is the name of the file, and
there is also a text file for the parts list.

72/73 de: Rick McKee, KC8AON < SW-20+, SW-30+, SW-40+, Norcal BLT, Norcal Cascade, Yaesu FT-7,
QRP-L #2112, FPqrp #33, AR QRP, AmQRP, Ohio Valley Fists, Zombie #718
For info on MQFD, go to: http://www.smartgroups.com/groups/mqfd
I'll give up CW & QRP when I'm dead ! MAYBE ! didididadidah

On Tue, 11 Nov 2003 14:38:31 -0800 (PST) Marc <wr2i@... ________________________________________________________________
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| 665|665|2003-11-17 05:31:48|ad5ez|Atlas 210M|
I now have an Atlas 210M and would like more info on it.
Lloyd (ad5ez)

[Non-text portions of this message have been removed]
| 666|666|2003-11-17 14:58:39|wb6rlg_bwmrc.com|Re: Atlas210x--> Atlas 210M|
I believe that was a M for Mars same radio as 210 just different band coverage.
| 667|667|2003-11-30 13:19:04|Jim Potts|VFO stabilizer|
Read here a while ago that someone was building a VFO stabilizer for
the Atlas. Any news on this front ? Apologies if its been done to
death, been too busy to read much.

Cheers
Jim
| 668|668|2003-12-01 06:45:30|ad5ez|Extremely Rare Atlas 210M|
http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&item=3062589164

[Non-text portions of this message have been removed]
| 669|667|2003-12-01 11:26:10|Mark Hill|Re: Atlas210x--> VFO stabilizer|
Jim,

I have suspended work on the prototype Atlas digital dial and huff and puff
stabiliser for the time being.

The unit works FB. Drift on the Atlas is now very hard to measure, at
around 3-4 Hz peak to peak. The LCD digital frequency readout gives 10 Hz
resolution and automatically works out which band the Atlas is on (but
NORM SB only), so it reads operating and not VFO frequency.

Unfortunately the project is still spread over the bench and not on a nice
PCB for installation in the radio. This will have to wait until I am less
busy business-wise. Of course, if there was anyone on the reflector that
wanted to volunteer to design and manufacture some PCBs to speed things up,
that would help!

Regards.

Mark.

-------------------------------------------------------
At 11:19 30/11/2003 +0000, you wrote:
*********************************************
Mark Hill - G4FPH
E-mail: g4fph@...
Radio web site: www.g4fph.freeserve.co.uk

Dipoles resonant on 1940/3760/7060 kHz
2 ele delta loop beam on 14180 kHz
*********************************************
| 670|667|2003-12-02 06:43:35|Jim Potts|Re: Atlas210x--> VFO stabilizer|
| 671|671|2003-12-11 22:51:16|John P.|Atlas 210X up for Sale|
Hi All,
Before I put my Atlas 210X up for sale on eBay, I wanted to see if there are
any USA amateurs with more time and energy than I that are intersted in
purchasing and repairing this unit? As far as I've been able to tell, the
first two boards are fine, everything lites up, but things go downhill on the
300 board. I do not have any power out, and audio is only variable hiss.
Mechanically it is in quite decent shape. No parts are missing, but after
pulling out my hair and not enough hours in the day, I'm abandoning the repair
of my 210X unit. It does not have the optional noise board. I will also
include two spare IC chips of the audio amp and CA chip. If you're interested,
please contact me off-list.
Thanks and Happy Holidays to all.
73's
John K8DAD

toledohamradio@...



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| 672|672|2003-12-15 16:16:41|Edio Scapolan da Silva|Atlas 210x receive problem|
I have a problem with receive on atlas 210x. When conected antena no
receive. When conected only positive of antenna, e not conected
ground of antena, receive is OK. Please help me.

Tanks
Edio PY4WW
Uberlandia/MG - BRAZIL
| 673|673|2003-12-16 09:04:46|Guido Wienands|Re: Atlas210x--> Atlas 210x receive problem|
| 674|673|2003-12-16 14:27:19|Peter Dalton|Re: Atlas210x--> Atlas 210x receive problem|
Hello Edio,

I had a similar problem with a 210x which was most noticable on 20m.

The problem in my 210x was caused by fault causing a loss of gain in the
first IF amplifier (2N3866) and was compounded by mistuning of the RX
input RF filters and the interstage coupling aroung the first IF stage.
Once the fault was fixed and the first IF stage gain returned to normal
and the front-end retuned the received performed well on all bands.

When you connect only the centre conductor of the co/ax to the antenna
input you are usually providing a high inpedance (unloaded) source to
the receiver and this generally supplies a higher signal voltage at
input of the receiver. In my case this higher signal was enough to
overcome the loss of stage gain caused by the fault, on the downside the
filters probably won't perform too well as they would not be properly
terminated under these conditions.

To be on the safe side however; I would also suggest that you check the
antenna feedline with another radio to make sure there is no problem
with your antenna system before looking at the front end of the 210x.

Regards and best of luck with your 210x,

Peter VK1XP

Edio Scapolan da Silva wrote:
| 675|671|2003-12-16 17:20:08|Bill Daugherty|Re: Atlas210x--> Atlas 210X up for Sale|
Still got it for sale??


Thanks and 73, Bill K4WWD

~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~



--- "John P." <toledohamradio@... __________________________________
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| 676|676|2003-12-16 19:54:41|k5dh@arrl.net|FS: 210x project rig|
For sale:

Atlas 210x project rig. The PA is definitely blown, but otherwise
the rig appears to be working. I can hear the low-level signal on
another receiver and it sounds fine. The receiver is definitely
good. The rig is missing most of the knobs (including the main VFO
tuning knob) and the VFO pointer window, the front panel is scruffy
looking, the outer case is not bad, and there is no mic and no power
cord. Does not have noise blanker. This rig could probably be
repaired, or if you have another parts rig, you could combine the two.

Asking $35 plus shipping

73,
Dean K5DH
k5dh@...
| 677|677|2003-12-17 03:51:54|peter oesterle|Re: Atlas210x--> FS: 210x project rig|
HIi Dean if you have not alreday sold the radio I am indeed interested
. Please email me Thanks Pete Ve3HOH/W3


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| 678|678|2003-12-17 16:09:49|k5dh@arrl.net|210x project rig has been sold -- thanks for the inquiries|
Sold!
| 679|679|2003-12-28 04:58:00|Lenora|Unsubscribe|
Unsubscribe
| 680|679|2003-12-28 16:32:49|Lenora|Unsubscribe|
Unsubscribe
| 681|681|2003-12-28 16:49:48|Rick McKee|Re: Atlas210x--> Unsubscribe|
To unsubscribe from this group, send an email to:
atlas210x-215x-unsubscribe@egroups.com


________________________________________________________________
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| 682|682|2004-01-07 03:28:43|mfelack|DD6-C manual?|
Does anyone have a scan of the DD6-C digital readout msnual and
especially the instructions to convert it for use on the Drake 4 line
receivers?

I now have a Model 206 Digital readout/extrernal VFO which frees the
DD6-C for possible use "elsewhere!!!

TIA 73,
Mike WA3WOM
| 683|683|2004-01-07 12:06:48|Edio Scapolan da Silva|I Need a VFO Stabilizer for Atlas 210X|
Please, help me. A Have an Atlas 210X With External Digital Display
by Atlas, but the VFO is not stabilized, I´d like a help for
stabilizer the Atlas VFO.

Tank´s for any help

Edio PY4WW
Brazil

py4ww@...
| 684|684|2004-01-10 21:39:20|taylor955m|PC-600 oscillator that WON'T|
First, thanks to Marc for all his help last summer trying to help me
track down my intermittent receive AGC problem on my 210X. I since
obtained a spare 210x (older boards) and isolated the problem with my
original to the IF board and not the AF board. Copious replacement of
both IC's and all the tantalum caps on PC-200 (thanks again Marc)
took care of the problem and all is well with 210X #1.

However, I would now like to get the "parts rig" going as well. I
have already corrected a number of problems but now I am stumped. The
PC-600 local ocsillator refuses to oscillate in either the normal or
reverse SSB mode. I have replaced both transistors. The voltages on
Q1 are nominal, but on Q2, the collector voltage is only .1 volt vs.
the 1.2 volt spec. However, I suspect that this is because it is not
being driven by Q1. There is no RF coming out of the Q1 emitter at
all.

This 210X is an older version with the 8.5v rather than 10v bus.
Thinking that this might be a contributor to the problem, I replaced
the 1N5221 Zener with a silicon diode. I'm now getting about 9.5v
here but it has not cured the problem. I have gone over the board
looking for solder bridges and cold joints to no avail. It's an
awfully simple circuit, which makes it even more frustrating.

What have I missed? I know I could have a bad crystal, but two? Any
ideas? Thanks in advance for any help.

Tim
N2TC
| 685|684|2004-01-10 22:37:25|uwsievers@web.de|Re: Atlas210x--> PC-600 oscillator that WON'T|
Tim try to turn the capacitors for both sidebands and if you have a 3rd one for the CW
shift... in older radios these are ceramic types they can loose their capicity because the
silver plating is gone.. then the oscillator will not start to generate rf....... may be replace
them with mylar type ones.
good luck Uwe DJ9XG
| 686|684|2004-01-11 00:11:16|Tim Nichols|Re: Atlas210x--> PC-600 oscillator that WON'T|
Thanks Uwe. I forgot to mention that I did try that and nothing happened.
However, the replacement idea makes sense. I'll try that. Know a good
source?
-----Original Message-----
From: uwsievers@... [mailto:uwsievers@...]
Sent: Saturday, January 10, 2004 3:41 PM
To: atlas210x-215x@yahoogroups.com
Subject: Re: Atlas210x--

Tim try to turn the capacitors for both sidebands and if you have a 3rd
one for the CW
shift... in older radios these are ceramic types they can loose their
capicity because the
silver plating is gone.. then the oscillator will not start to generate
rf....... may be replace
them with mylar type ones.
good luck Uwe DJ9XG
| 687|687|2004-01-11 20:34:28|Walter F. Júnior|Introduction|
Hi! Dear friends, it's a pleasure to become part of this group.
I have an Atlas 215X, whose reception is excellent, general
conditions are good, but it has no excitation. Output transistors are
ok. I'd like to know how much such equipment can be sold for, without
being repaired. Thanks in advance and have a good week everybody!

73's
Facury - py4orl
| 688|688|2004-01-11 23:24:40|Rick McKee|Re: Atlas210x--> Introduction|
I've seen them go in the range of $35 to $50 (US) in partial working
conditions.

72/73 de: Rick McKee, KC8AON < SW-20+, SW-30+, SW-40+, Norcal BLT, Yaesu FT-7, Homebrew 6V6 tube TX
QRP-L #2112, FPqrp #33, AR QRP, AmQRP, Ohio Valley Fists, MQFD #1
Monthly QRP Field Day info at : http://www.smartgroups.com/groups/mqfd
I'll give up CW & QRP when I'm dead ! MAYBE ! didididadidah

On Sun, 11 Jan 2004 18:34:25 -0000 =?iso-8859-1?q?Walter_F._J=FAnior?=
<py4orl@... ________________________________________________________________
The best thing to hit the internet in years - Juno SpeedBand!
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| 689|689|2004-01-19 16:04:27|Dean Hemphill|Need a manual for your 210/215 or 210x/215x ? ? ?|
Do you need an ORIGINAL manual for your 210/215 or 210x/215x? As of
Saturday 01/17/03, Nortex Electronics in Fort Worth, Texas, had one
each 210/215 and 210x/215x manuals for sale for $5.00 each plus tax.
Here is a web link that gives their contact information:

http://www.montagar.com/~patj/nortex.htm

They had two of the 210x/215x manuals, and I bought one of them for
myself.

Please don't ask me to go pick one up for you. Nortex is located 55
miles each way from my home!

73,
Dean K5DH
| 690|690|2004-01-20 05:15:09|Rick|Main Tuning Dail Needed|
Hi All!!,...I have a Atlas-210X That needs a dail, it don't have to
be presteen or new, you're average condition will do fine,....Thank
You!, Rick KQ4UV
| 691|691|2004-01-20 15:28:17|RUDOLPH KING|Re: Atlas210x--> Main Tuning Dail Needed|
Rick:- I have a dial removed from my 210 when I installed the digital
readout, how much are you offering for it. I am located in Miami Florida tel
#3052346683
Rudy King


| 692|690|2004-01-20 23:46:23|Dean Hemphill|Re: Main Tuning Dail Needed|
Rick,

I *think* I have a spare one, and if I do, I'll give it
to you for the cost of postage. Are you good on ARZ.com?

I guess I'd better clarify what I have vs. what you need.
I have the dial strip only, not the entire plastic drum.
Will that suffice?

73,
Dean K5DH

| 693|3|2004-01-21 23:42:29|pg jönsson|new member|
[Non-text portions of this message have been removed]
| 694|683|2004-01-26 14:40:20|Mark Hill|Re: Atlas210x--> I Need a VFO Stabilizer for Atlas 210X|
Edio,

I have started to transfer my VFO 'huff and puff'-type stabiliser design
for the Atlas radio to a PCB, so may be able to help you later this year.

My experience is that the original Atlas VFO is quite stable for a band
switched, free-running type. Immediately after switch-on, expect a few
hundred Hertz drift, settling down after 20 minutes or so to a few tens of
Hertz on the lower bands. If yours drifts more than this, it may need
maintenance.

If using the radio mobile, it is wise to replace the 10 Volt regulator (if
yours is fitted with this) with a low drop-out type.

I hope this is helpful to you.

Regards.

Mark.

---------------------------------------------
At 10:06 07/01/2004, you wrote:
| 695|695|2004-01-28 02:57:30|PEB JAG|10m Dial for the 210X?|
Who had some extra dials for the Atlas 210X that covered the 10m modification?

Thanks,

Dave WB1CDG (formerly 7J6CCH)



---------------------------------
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Yahoo! SiteBuilder - Free web site building tool. Try it!

[Non-text portions of this message have been removed]
| 696|695|2004-01-29 21:52:57|Dean Hemphill|Re: 10m Dial for the 210X?|
Dave,

See msg nr 651 in this Yahoo group.

73,
Dean K5DH

| 697|695|2004-01-30 01:40:33|Marc|Re: Atlas210x--> Re: 10m Dial for the 210X?|
One can also use the dial pic in the files area and
print it.
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| 698|698|2004-02-02 15:41:15|earlinclayton|CW switch for Atlas 210x..anyone have a schematic|
I have 2 -210x's. One is my main station rig. I find it quite stable..
and works fb..but Id like to wire up a CW switch. From reading
previous posts on this list..the schematic diagram in the manual is
wrong.. can anyone give me a better schematic..or perhaps tell me the
errors in the schematic?
By the way..when I bought my atlas..at a flea market..it had a known
problem..instability on transmit. I cleaned up alot of the contacts
and made an adjustment on potentiometer..(carrier null or balance..
I forget exactly...anyways..the rig settled down and works great.

tnx Earl VE3AB
| 699|699|2004-02-05 18:28:50|om_peter2003|Help! IC and capacitor went up in smoke!|
Hello!

On the PC300C board of my Atlas 210x a capacitor labeled "22 16V"
and the upper left IC went off in smoke :-(

Can anyone tell me wwhich IC and what capacitor I need to repair my
Atlas 210X?

73
Peter
| 700|700|2004-02-06 12:54:10|om_peter2003|Which parts are destroyed when changing Plus & Minus?|
Hello!

Presumably the pre-ownwer of my Atlas 210x did inadvertently exchange
the plus and minus on the DC-cable.

Do you know what parts will be destroyed in this case? Where do I
have to look first?

Thanks in advance!

Peter
| 701|700|2004-02-06 14:08:21|Marc|Re: Atlas210x--> Which parts are destroyed when changing Plus & Min|
Firts things to go are reverse polarity protection
diode strapped on the rear panel power jacks. Then the
AF amplifier, then electrolytics or tantalums in most
circuits................

Marc WR2I
--- om_peter2003 <om_peter2003@... __________________________________
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| 702|702|2004-02-06 18:43:43|om_peter2003|Removing the PC-300C, what happens?|
Hello (again)!

To localize a major malfunction I think that probably the PC-300C
has the error on its card. So, for me it would be helpful to know,
wether the 210x would do anything when the PC-300C is removed. Is
there still reception, is transmissitting possible? Maybe everything
without the NF audio?

To know that there is still some "life" in the TRX when the PC-300C
is removed would be very helpful!


Greetings,
Peter
| 703|702|2004-02-06 19:39:17|uwsievers@web.de|Re: Atlas210x--> Removing the PC-300C, what happens?|
Hello from Germany,
if you remove the PC300 there will be no functions in the Atlas anymore..
f.e. the VFO and the RF-drive signal is swiched on this board (a FET quad switch).
So to check more function in the Atlas you must have a working PC300 board installed.
73,s de Uwe DJ9XG



| 704|704|2004-02-06 22:06:57|wrsekul@aol.com|Atlas 215x Digital Display Question|
Sometime back I think it came across this group that you could get digital
displays that were mounted inside the radio to take the place of the spinning
dial! Does anyone know the name of the person that installed these, or do you
know where to get them!

73's and thanks in advance;
Wm. Robert Sekul, N5XXX


[Non-text portions of this message have been removed]
| 705|704|2004-02-06 23:04:41|Marc|Re: Atlas210x--> Atlas 215x Digital Display Question|
www.aade.com

almost all digital electronics
--- wrsekul@... wrote:
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| 706|706|2004-02-06 23:30:08|AA5fs@aol.com|Re: Atlas210x--> Digest Number 240|
In a message dated 2/6/04 2:56:48 AM Central Standard Time,
atlas210x-215x@yahoogroups.com writes:
Message: 1
Date: Thu, 05 Feb 2004 16:27:55 -0000
From: "om_peter2003" <om_peter2003@... Subject: Help! IC and capacitor went up in smoke!

Hello!

On the PC300C board of my Atlas 210x a capacitor labeled "22 16V"
and the upper left IC went off in smoke :-(

Can anyone tell me wwhich IC and what capacitor I need to repair my
Atlas 210X?
From the schematic in the manual its a 22mf 16v electrolytic capasitor
C318 and Q302 is an LM380N i.c., af output. Hope this helps. Roy (aa5fs)


[Non-text portions of this message have been removed]
| 707|700|2004-02-07 19:20:48|om_peter2003|Re: Atlas210x--> Which parts are destroyed when changing Plus & Min|
Thanks! But what does this diode on the rear panel look like? I
can't find a (typical) diode...

73-
Peter


| 708|700|2004-02-07 19:34:50|Marc|Re: Atlas210x--> Which parts are destroyed when changing Plus & Min|
look at the circuit.....

cathode to positive input terminal, anode to ground.
--- om_peter2003 <om_peter2003@... __________________________________
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| 709|700|2004-02-07 19:41:36|om_peter2003|Re: Atlas210x--> Which parts are destroyed when changing Plus & Min|
Is it the big green thing?

| 710|700|2004-02-07 19:55:25|uwsievers@web.de|Re: Atlas210x--> Which parts are destroyed when changing Plus & Min|
Peter,
im Standard haben die keine Schutzdiode drin.... wenn du eine gehabt hättest wäre
sonst nichts defekt gegangen.... die Polarisationsdiode schlägt bei Verpolung durch und
macht gegenüber dem Netzteil einen Kurzschluss. Ich vermute du hattest keinen Schutz
gegen Verpolung, dann geht alles hoch was die Verpolung nicht verträgt. Auch die PA-
Transistoren sind leider nicht geschützt. Die Versorgungssspannung geht direkt an die
PA-Transistoren. Ich hoffe dass dieses nicht passiert ist. Aber rechne mit dem
schlimmsten Fall, dass du alle Halbleiter und viele Elkos tauschen musst.
73 de Uwe DJ9XG


| 711|711|2004-02-08 21:42:06|Douglas|Atlas 210 frequency readout|
You might also try Small Wonder Labs.
I think their web site is www.smallwonderlabs.com

They make a neat little pcb kit called the Frequency
Mite. It is a frequency counter with a programmable
I.F. offset allowing it to be used with almost any
rig.
It gives frequency output accurate to 1KHz by sending
it in Morse. Its output can be tacked into the rigs
audio amp or a small piezo transducer can be installed
to hear the Morse readout. The kit is only $20.

You do have to install a pushbutton switch somewhere
-probably on the back of the rig, or perhaps in the
blank front panel position if your Atlas 210 series
rig doesn't have the noise blanker..
Each time you push the button, the frequency reads out
in Morse. The I.F. offset can also be used at zero and
then the unit can be used as a regular frequency
counter for bench test purposes.

Doug/WA1TUT

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| 712|712|2004-02-09 04:13:51|Art|more problems with 210x|
Hi all. Its Art. The one who fixed his finals with the help of
WR2I a while back. Well I'm still trying to get this rig on the
air. Having a problem that so far stumps most people.
When I connect just the center conductor to any coax (doesnt matter
wheather its attached to an antenna or not) I get a normal receive
sound. But when I screw on the rest of the connector, I hear
nothing. Ckecked for shorts in the coax and found none. I since was
givin a mountrous cushcraft vertical (26 feet set up for 10-80}, set
it up in my basement (yes horizontally) just to clean it up and make
sure all the parts were there. Hooked it up to Atlas and basicaly
the same thing happens. Lots of signals with center conductor only
connected and a much reduced signal with the ring attached. Anyone
have any idea what might be causing this?
Looking forward to hearing from someone. Best 73, Art
| 713|713|2004-02-09 07:41:54|Ben K8DIT|Re: Atlas210x--> more problems with 210x|
Art,

What you describe is a bad coax, a bad coax connector, or the female
connector on the rig is faulty. Where your center conductor is connecting
but putting pressure on it will open it up.

Im pretty good at parsing folks communications. My guess is that you are new
at this part of the ham radio hobby, is this correct? You could be
experienced at some electronic applications, like removing and reinstalling
final amp transistors, but do you have the necessary bench testing gear to
measure drive and bias voltages accurately?

This would entail some specialized experience. Are you good at tracing
circuitry, both rf and d.c.? Are you using a scope of any kind? If not, I
recommend an alternate to fixing this yourself. You could fix it. You could
also fix it so that it cannot be fixed. I dont know you, but I need to know
where along the way your pracitcal experience lies.

If you dont have an antenna analyzer, a way to measure the match your
vertical you are still in the woods. Alot of techs find Atlas gear a
challenge because its a departure from the popular design parameters of its
day. Most techs find a linear alignment and nothing could be further from
the truth. Each board is aligned seperately to certain parameters and when
joined go to make up the whole circuit.
If you've peaked coils and tweaked variable capacitors you need to send this
to a qualified person for any hope of operating this rig in any way.

Even when working properly some users are under the impression it operates
like current day equipment. It does not. There are a few idiosynchracies you
learn from experience.
| 714|713|2004-02-10 01:55:47|Art|Re: Atlas210x--> more problems with 210x|
Hello Ben

Thanks for the speedy reply. You got me! I have been parsed! I do
not have a lot of electronics backround and wouldnt think of messing
with the inside of the Atlas. On a limited budget with regard to
radio I would like to think that I could find a minor problem and
fix it myself. I have fixed tv's and vcr's in the past probably
because they were easy and/or I was lucky! I used to sit closly
with my late Father who was a radio Mechanic for the airlines. He
had all those test goodies but I never really understood what was
going on and of course never had any formal training. Mad at myself
for that mistake. Anyway Ben, I have read most of your posts and
I'm convinced that I should take your advice. Its hard to know who
to trust. You mention quite often of a guy who fixes Atlas. Glen i
think. Can you tell me if he is still available to go over this
radio? I really would love to have it back in service. Even more
so I would Love to get a brand new kenwood, icom,or yeasu but dont
have $700-$1800 just lying around so I've got to make do with what I
have.
Please let me know.
Art.
| 715|713|2004-02-10 02:05:24|Marc|Re: Atlas210x--> more problems with 210x|
Wow,

Hams are really something. Free advise from me, and
send the radios to someone else.


Marc WR2I
The Radio Clinic of NYC
High Performance Radio sales/service
--- Art <n2dqz@... __________________________________
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| 716|713|2004-02-10 02:22:36|Art|Re: Atlas210x--> more problems with 210x|
| 717|713|2004-02-10 02:26:06|Art|Re: Atlas210x--> more problems with 210x|
--- In atlas210x-215x@yahoogroups.com, Marc ok Mark tell me the thing you see happening
| 718|713|2004-02-10 02:44:56|Marc|Re: Atlas210x--> more problems with 210x|
Art,

I spent time on the phone with you (my nickle) telling
you how to test a transistor step by step. This
enabled you to find blown PA devices.

Now you want to send the radio to someone else and
want more of my time? I am not registered with the IRS
as a charity. I don't mind the quick experienced
answers to questions, but this is rediculous.

As Ben said, send the radio to an experienced tech.

Good luck,

Marc

--- Art <n2dqz@... __________________________________
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| 719|713|2004-02-10 04:43:44|Ben K8DIT|Re: Atlas210x--> more problems with 210x|
Marc, Art,

I just got home from work. I was surprised to see the conflicting posts. I
live on the west coast and you guys on the east.

I would rather not be in the middle of your relationship. I made my remarks
without knowing that I may have offended someone. It was not my intention.

I am not a technician. My posts on eham.net are pretty clear that I am an
Atlas fan.
My perspective comes from sitting at the elbow of someone who repaired mine.
Contact me off list if I can be of further help.
| 720|713|2004-02-10 07:16:04|Art|Re: Atlas210x--> more problems with 210x|
Marc. It was my nickel too. Have tried several times to contact
you on your repeater. When we did hook up you had no ideas or time
to talk about it. Not at all my intention of getting your free
advice on a continuous basis. Since you are an experienced tech. I
will send you the rig. Whats the address?

| 721|711|2004-02-10 09:32:06|K5HML - Harry|Re: Atlas210x--> Atlas 210 frequency readout|
Check with Almost All Digital Electronics,
http://www.aade.com/
They have a number of digital readouts available,
both in kits and ready-built.
Since they have digital frequency readouts for
just about the whole line of Swan rigs, they might
also have something that will work with Atlas too.

Harry, K5HML
San Antonio, Texas


--- Douglas <sparks06524@... __________________________________
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| 722|722|2004-02-12 00:56:48|Freeman Chuck|(no subject)|
---------------------------------
Do you Yahoo!?
Yahoo! Finance: Get your refund fast by filing online

[Non-text portions of this message have been removed]
| 723|723|2004-02-12 11:04:23|hamarathonman|Looking for a MT-1 Transformer...|
Hello,
I'm looking for a MT-1 transformer.
Thank's for your help!
Best 73's

Jean-Marc
| 724|724|2004-02-12 11:28:30|hamarathonman|Looking for an Atlas 180|
Hello,
I'm looking for an ATLAS 180 in perfect condition
Thank's and best 73's

Jean-Marc
| 725|725|2004-02-15 19:56:08|hamarathonman|SHURE 404C Microphone|
Hello,
I'm looking for a Shure microphone,mod.404C
Thank's for your help.
73's
| 726|726|2004-03-05 08:47:51|Jim Potts|Collector needed|
Hi. On the way to rebuilding my brother's 210x I kinda accumulated a
few Atlas radios. Very shortly I will be unloading most of my Atlas
Collection.
I thought I'd give this group first chance.

I expect to have
3 210X radios in good to very good condition
1 215 " "
A 200 PS power supply
An Atlas external xtal oscillator
A mobile mount...unused
An Atlas 220 CS Console without the vox option.

I will be looking to sell as one lot; offers for any individual
radios or accessories had better be good :))

ALL the radios and accessories are working, both tx and rx. Apart
from the odd driver transistor they are not modded.
Please note I am in Australia but will Fedex world wide.

If anyone has any interest in making an offer for the collection
please email.

Many thanks
Cheers
Jim
| 727|726|2004-03-07 14:07:31|S J-M|Re: Atlas210x--> Collector needed|
Hello,

I am interested by your Atlas 215 and the xtal oscillator.
How much is the price ?
Best 73's

Jean-Marc

Jim Potts <jimshire1@... Hi. On the way to rebuilding my brother's 210x I kinda accumulated a
few Atlas radios. Very shortly I will be unloading most of my Atlas
Collection.
I thought I'd give this group first chance.

I expect to have
3 210X radios in good to very good condition
1 215 " "
A 200 PS power supply
An Atlas external xtal oscillator
A mobile mount...unused
An Atlas 220 CS Console without the vox option.

I will be looking to sell as one lot; offers for any individual
radios or accessories had better be good :))

ALL the radios and accessories are working, both tx and rx. Apart
from the odd driver transistor they are not modded.
Please note I am in Australia but will Fedex world wide.

If anyone has any interest in making an offer for the collection
please email.

Many thanks
Cheers
Jim


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| 728|728|2004-03-11 18:34:25|jmiccolis|Atlas 180 and AR117 question|
Hello,

I was wondering if anybody has had a similar experience and if so
what they did about it. I am getting a large amount of RFI in my
audio using the 180/ar117 console combo. Not only have I received
on-air reports stating such but have also observed more than
acceptable movement on my in-shack field strength meter. I checked
cable connectors on all my patch cords, antenna feedline, and
ensured that my station was otherwise properly grounded. Help?

Thanks and 73!
Jon, KB9WVK
| 729|729|2004-03-11 20:21:56|kc8aon@juno.com|Re: Atlas210x--> Atlas 180 and AR117 question|
You failed to mention a description of your antenna setup - it would go a long way in helping solve your problem ! What type of antenna ? What type of feedline ? What freqs are you having the problem on ? Describe your ground setup. Are you on the second floor with a long ground ? Do you have the same problem with other radios ? etc ect...

73
Rick, KC8AON

________________________________________________________________
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| 730|730|2004-03-18 23:28:50|Dean Hemphill|For sale: Atlas 210x w/NB SUPER NICE|
For sale, from the estate of Walt, WB5LJW (SK):

Atlas 210x with Noise Blanker. This is a SUPER NICE rig, in truly
OUTSTANDING condition. I haven't tested it myself, but this was
Walt's main rig at the time of his passing, in daily use on SSB and
CW, and it was still hooked up and ready to use when I removed it
from his station on Tuesday 03/23/04. Comes with a hand mic (looks
like a Kenwood) and a DC power cord about 2 feet long. I also found
an extra PC-100D board in unknown condition among the flotsam and
jetsam of Walt's shack, and I will include it also. It appears to be
complete and no parts are smoked. If he had it, it's probably good
(he tended not to keep any useless scrap around). I looked around
for the manual but I couldn't find it. He may not have had one. If
you're a member of this Yahoo group, you probably have it anyway.

The price is USD $150 (FIRM), plus shipping. Yes, that's top dollar,
but this one is really worth it. Folks, this is honestly the nicest
used 210x that I've ever seen in my 27 years of hamming. It makes
the one whose picture heads this group look like an old klunker. The
only flaws I remember seeing were a previous owner's call and SSN
engraved on the rear panel. There are NO other marks on it. The
front panel, knobs, and cabinet look wonderful! I can shoot digital
pics and email them, if necessary.

I am personally getting nothing from this sale. I am helping Walt's
wife dispose of his radio and electronic stuff. All of the money
goes to his family.

Thanks and 73,
Dean K5DH
| 731|731|2004-03-27 11:22:57|Jim Potts|Driver|
Hi. Can anyone tell me if the driver transistor (the rca one used in
the Atlas PA) is availiable anywhere ?
Cheers
Jim
VK4BBG
| 732|732|2004-03-27 14:59:53|Rick McKee|Re: Atlas210x--> Driver|
What is the number on the RCA device ? I'll see if I can cross it over
to NTE.

72/73 de: Rick McKee, KC8AON < SW-20+, SW-30+, SW-40+, Norcal BLT, Yaesu FT-7, Homebrew 6V6 tube TX
QRP-L #2112, FPqrp #33, AR QRP, AmQRP, Ohio Valley Fists, MQFD #1
Monthly QRP Field Day info at : http://www.smartgroups.com/groups/mqfd
To those that say CW is outdated - can you speak all DX languages on
phone ?


________________________________________________________________
The best thing to hit the Internet in years - Juno SpeedBand!
Surf the Web up to FIVE TIMES FASTER!
Only $14.95/ month - visit www.juno.com to sign up today!
| 733|731|2004-03-27 15:00:44|ve3pyg@rac.ca|Re: Atlas210x--> Driver|
On 27 Mar 2004, at 9:22, Jim Potts wrote:

Yes, NTE has an equivalent. BUt do not use it. It is very expensive.

As I was advised on this group. I replaced burnt out PA's with a
matched pair of MRF455's from R.F. Devices. The 210X now works
fine.




Dr. David G. Stephenson, VE3PYG,
Merrickville, On. Canada: dstphnsn@....

"Happy the humble state of the scholar who retires from this malicious
world, and in the pleasant countryside, with modest table and board,
governs his life with God alone, and passes his days by himself,
neither envied nor envying." de Leon (under process by the Inquisition)
| 734|731|2004-03-28 12:02:44|Jim Potts|Re: Atlas210x--> Driver|
--- In atlas210x-215x@yahoogroups.com, ve3pyg@r... wrote:

Next question. Has anyone replaced the driver with a common garden
variety device ?


Yes, been there done that. Plenty of go from the original P/S. But
driver is a strange beast. Tried a couple of devices in desperation
and they were as good as a dummy load. I guess I'd need (*throws dart
at board* :) about 15W out and about 8-10 db gain at 30 meg.



Cheers
Jim
| 735|731|2004-03-29 08:58:17|sasi nayar|Re: Atlas210x--> Driver|
Jim
I got mine replaced for SGD 45/- in Singapore. They
are available here.
73
Sasi
9V1SM


=====
Amateur Radio For Global Peace and Fraternity
----------------------------------------------
Sasi Nayar, 9V1SM / VU3SNM,
Marine Biology Lab, Department of Biological Sciences
National University of Singapore,14 Science Drive 4
Singapore 117 543. Tel : (65) 6874 6867 URL:http://www.dbs.nus.edu.sg/lab/reef/SasiNayar.htm

__________________________________
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| 736|731|2004-03-29 10:15:43|Jim Potts|Re: Atlas210x--> Driver|
--- In atlas210x-215x@yahoogroups.com, sasi nayar ones are availiable there (I take it you mean Singapore ?). If so, is
there a website where I can order them from or something ?

Cheers
Jim VK4BBG
| 737|731|2004-03-29 10:15:49|Jim Potts|Re: Atlas210x--> Driver|
--- In atlas210x-215x@yahoogroups.com, sasi nayar ones are availiable there (I take it you mean Singapore ?). If so, is
there a website where I can order them from or something ?

Cheers
Jim VK4BBG
| 738|738|2004-03-29 22:40:00|Dean Hemphill|FS: Atlas 220CS base station consoles (PROJECT)|
For Sale:

I have two Atlas 220CS base station consoles that
need a home. They are both disassembled, pretty
dirty, and are definitely NOT in working condition.
There are probably enough parts to build one good
unit from the two. One of them HAD the VOX setup,
but it's long gone. I don't know if any of the
parts are good or not. But, if you need a 220CS
and aren't afraid of a little work, this may be
your golden opportunity. With working consoles
going for $100 or more on eBay, this deal sounds
even better.

The price is $30.00 for all of it, plus shipping.
I ship via FedEx Ground, which is the cheapest
method (as well as usually being the fastest!).

I sold my 210x at a hamfest this past weekend, so
I no longer have a need for the consoles that I
never got around to working on. Typical...

73,
Dean K5DH
k5dh@...
| 739|731|2004-03-30 03:41:09|Jim Potts|Re: Atlas210x--> Driver|
--- In atlas210x-215x@yahoogroups.com, "Jim Potts" Well I just rang my local parts suppliers. Their response was "huh?".
Rang the largest electronics and parts suppliers in Australia and got
a worse response (and it isn't even Friday!). Their opposition was
the same. If they couldnt sell me 1000 of whatever they had in stock
then tough luck. Searched the web for Singapore related info and
zilch.
Cheers
Jim
| 740|731|2004-03-30 15:45:14|ve3pyg@rac.ca|Re: Atlas210x--> Driver|
I replaced the driver of my 210x with the ECG (NTE) equivalent. It
cost about $10.

ECG224

works fine.

Note: reason for replacing driver (turned out to be unnecessary) and
PA. Do not run 100W on CW on a warm day for more than a few
minutes!!!!

I now have an old 12V computer PSU fan mounted on the heat sink.
Dr. David G. Stephenson, VE3PYG,
Merrickville, On. Canada: dstphnsn@....

"Happy the humble state of the scholar who retires from this malicious
world, and in the pleasant countryside, with modest table and board,
governs his life with God alone, and passes his days by himself,
neither envied nor envying." de Leon (under process by the Inquisition)
| 741|732|2004-03-31 01:25:40|Jim|Re: Atlas210x--> Driver|
Thanks, Dave. Much appreciated. I work with commercial 100W Hf gear on a daily basis. The Atlas PA doesn't seem to be as robust in terms of heat dissapation and bias thermal stability etc. That heatsink gets awful warm if I tune up into a dummy load for more than a minute or so.
I have noticed a very strong birdie around 14130 khz in a few of the 210x's. Was this a "feature" I wonder ?

Cheers
Jim


| 742|731|2004-03-31 14:28:55|sasi nayar|Re: Atlas210x--> Driver|
Hi Jim
No these are not the original ones. I think what I
have is a Motorola substitute. I got one of the
workshops here to do it for me. I had to get the radio
alligned as well.
Their details are :
Wireless Marketing Pte Ltd
Block 30 Defu Lane 10 #02-98
Postal/Zip Code : 539211
Singapore
Telephone : (65) - 6281 9227
Telefax : (65) - 6281 5898
Website : www.wireless.com.sg
The contact person is Mr. Ivan Weller (He used to be a
ham until about 2 years ago).
Please let me know if I can help you in anyway
Hope this helps
73
Sasi
9V1SM

-

=====
Amateur Radio For Global Peace and Fraternity
----------------------------------------------
Sasi Nayar, 9V1SM / VU3SNM,
Marine Biology Lab, Department of Biological Sciences
National University of Singapore,14 Science Drive 4
Singapore 117 543. Tel : (65) 6874 6867 URL:http://www.dbs.nus.edu.sg/lab/reef/SasiNayar.htm

__________________________________
Do you Yahoo!?
Yahoo! Finance Tax Center - File online. File on time.
http://taxes.yahoo.com/filing.html
| 743|732|2004-03-31 14:33:52|Jim|Re: Atlas210x--> Driver|
Hi Sasi, many thanks for the info, its appreciated.
Cheers
Jim
| 744|744|2004-04-02 09:20:44|Jim Potts|PC100 board wanted.|
Working PC100 board wanted, also any extender boards. Name your
price :)))))

Cheers
Jim
VK4BBG
| 745|745|2004-04-05 08:41:29|Jim Potts|FS some Atlas stuff|
http://cgi.ebay.com.au/ws/eBayISAPI.dll?
ViewItem&item=3089829975&category=3308&sspagename=STRK%3AMESSE%
3AIT&rd=1


http://cgi.ebay.com.au/ws/eBayISAPI.dll?
ViewItem&item=3089829367&category=3308&sspagename=STRK%3AMESSE%
3AIT&rd=1


http://cgi.ebay.com.au/ws/eBayISAPI.dll?
ViewItem&item=3089828695&category=3308&sspagename=STRK%3AMESSE%
3AIT&rd=1


Cheers
Jim
| 746|746|2004-05-05 10:11:45|Göran|No amp meter reading in transmit|
This 210X is a bit strange: The last few weeks I have worked a never
previously used 210X with very nice report from all continents. Full
effect on all bands is shown on the ATU instrument. However the 210X
amp meter is dead. The S meter works OK. Any idea what is wrong?
73 de Goran SM0YPT
| 747|747|2004-05-05 10:14:49|Göran|Crystals for 10XB?|
I am now the lucky owner of a 10XB and I am looking for some crystals
for ham bands, preferably 80, 40 and 20 meter. Are there by any
chance any such Xtals in the Atlas junk boxes around the world?
73 de Goran SM0YPT
| 748|746|2004-05-05 10:14:49|Jim|Re: Atlas210x--> No amp meter reading in transmit|
Check the relay on the PC100 board.
Cheers
Jim
-----Original Message-----
From: Göran [mailto:SM0YPT@...]
Sent: Wednesday, 5 May 2004 6:11 PM
To: atlas210x-215x@yahoogroups.com
Subject: Atlas210x--

This 210X is a bit strange: The last few weeks I have worked a never
previously used 210X with very nice report from all continents. Full
effect on all bands is shown on the ATU instrument. However the 210X
amp meter is dead. The S meter works OK. Any idea what is wrong?
73 de Goran SM0YPT



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[Non-text portions of this message have been removed]
| 749|746|2004-05-05 10:34:57|Göran|Re: Atlas210x--> No amp meter reading in transmit|
Problem solved in a minute! Tnx Jim!

I just replaced the PC100 with a PC120 and the amp meter worked
beutifully in transmit.

What could be wrong with the PC100 relay? It seems to work all right,
but it might need to be cleaned after all these years in store. I´ll
open it and have a look.
73 Goran SM0YPT

| 750|746|2004-05-05 10:47:32|Jim|Re: Atlas210x--> No amp meter reading in transmit|
Great ! Check the contacts and also the wires from the board actually on the
realay. And check the tracks on the board. All can be done easily with a
multimeter.
Cheers
Jim
-----Original Message-----
From: Göran [mailto:SM0YPT@...]
Sent: Wednesday, 5 May 2004 6:35 PM
To: atlas210x-215x@yahoogroups.com
Subject: Re: Atlas210x--

Problem solved in a minute! Tnx Jim!

I just replaced the PC100 with a PC120 and the amp meter worked
beutifully in transmit.

What could be wrong with the PC100 relay? It seems to work all right,
but it might need to be cleaned after all these years in store. I´ll
open it and have a look.
73 Goran SM0YPT

| 751|751|2004-05-11 02:43:37|w7gtz@netzero.com|atlas210x|
Hello; Amlooking for a 210x service manual. wondering if anyone can help? Thank you. w7gtz@...
| 752|751|2004-05-11 02:48:30|Jim|Re: Atlas210x--> atlas210x|
Go to the files section of the Yahoo website for this group.

Cheers
Jim
-----Original Message-----
From: w7gtz@... [mailto:w7gtz@...]
Sent: Tuesday, 11 May 2004 10:42 AM
To: atlas210x-215x@yahoogroups.com
Cc: w7gtz@...
Subject: Atlas210x--


Hello; Amlooking for a 210x service manual. wondering if anyone can help?
Thank you. w7gtz@...

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[Non-text portions of this message have been removed]
| 753|753|2004-05-11 14:12:10|Pierre|Re: Atlas210x service manual.|
Dear W7GTZ,

Atlas 210 Service Manual as opposed to the Operators/Owners Manual,
there isn't one. Apparently Herb and boys never got around to writing
one, the best you can do is find as many of the service bulletens as you
can. Search using Google or one of the popular search engines, I found a
site which had copies of some of the service bulletens in .pdf format
some time ago (forgot the URL).

Good luck,

Peter VK1XP

w7gtz@... wrote:
| 754|754|2004-05-24 09:50:38|Göran|Rigblaster + Atlas?|
Anybody used a Rigblaster with their 210X (for speech processing,
etc?) Or any other speech processor?
Goran SM0YPT
| 755|754|2004-05-24 10:01:01|Jim|Re: Atlas210x--> Rigblaster + Atlas?|
I'd be a bit careful as that would increase the duty cycle of the PA and
generate more heat. The PA can be a bit fragile under those circumstances. A
fan directed into the heatsink might be a good idea.

Cheers
Jim
-----Original Message-----
From: Göran [mailto:SM0YPT@...]
Sent: Monday, 24 May 2004 5:50 PM
To: atlas210x-215x@yahoogroups.com
Subject: Atlas210x--

Anybody used a Rigblaster with their 210X (for speech processing,
etc?) Or any other speech processor?
Goran SM0YPT



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[Non-text portions of this message have been removed]
| 756|756|2004-06-03 08:47:42|ltvslsjh46|Important News for atlas210x-215x Members|
I was really far into debt.
Like Most I was in Financial dispair.
I could not seem to get ahead no matter how hard I tried.
Untill I found this place.
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If you are in debt they can help you out.
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This email was sent because you joined our group.
If you do not wish to recieve any emails, unsubscribe.
by sending a mail here atlas210x-215x-unsubscribe@yahoogroups.com
| 757|756|2004-06-09 07:01:30|cegdwdv136|Important News for atlas210x-215x Members|
I was really far into debt.
Like Most I was in Financial dispair.
I could not seem to get ahead no matter how hard I tried.
Untill I found this place.
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If you are in debt they can help you out.
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This email was sent because you joined our group.
If you do not wish to recieve any emails, unsubscribe.
by sending a mail here atlas210x-215x-unsubscribe@yahoogroups.com
| 758|758|2004-06-09 10:25:57|pvxunul163|my bills are gone!|
hey hey, just thought id tell you guys about this free debt consolidation site that reduced my monthly payments by damn near half, no more worries about bills!

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I posted this on atlas210x-215x, if you dont want to be a member anymore just email atlas210x-215x-unsubscribe@yahoogroups.com
| 759|756|2004-06-09 19:15:15|cegdwdv115|Important News for atlas210x-215x Members|
I was really far into debt.
Like Most I was in Financial dispair.
I could not seem to get ahead no matter how hard I tried.
Untill I found this place.
http://indebt.place.cc
If you are in debt they can help you out.
Check them out today I did.
This email was sent because you joined our group.
If you do not wish to recieve any emails, unsubscribe.
by sending a mail here atlas210x-215x-unsubscribe@yahoogroups.com
| 760|760|2004-06-10 06:14:48|parnold|Re: Atlas210x--> Important News for atlas210x-215x Members|
This is a low-class cheap shot from a total jerk! What a way to jump in and
try to destroy a valuable "news group". I hope we can find some way to
dump this jerk - anyone know a good hacker that can track him down?

Paul


cegdwdv115 wrote:

--

"We fight not to enslave, but to set a country free, and to make
room upon the earth for honest men to live in." --Thomas Paine
| 761|761|2004-06-10 16:18:33|K8DAD|What's with all this spam all of the sudden?|
I too, am sick of the recent spam from cegdwdv115 and their co-horts.

If he wouldn't buy every Atlas 180, 210, 215 and power supply he
sees, maybe he wouldn't be so far in debt!

Regarding Atlas radios:
Is anybody using a 'switching'-type power supply with their Atlas,
rather than a linear power supply? I don't think it will make any
difference, but I thought I'd see what others have experienced. A 20-
amp switching power supply is less than have as big and heavy as a
standard 20A supply.

73's
JP
| 762|761|2004-06-10 16:43:06|sasi nayar|Switching power supply|
I use a Diamond GZV2500 with my 210X limited edition.
No issues so far.
73
Sasi
VK5SN


=====
Amateur Radio For Global Peace and Fraternity
----------------------------------------------
Sasi Nayar, VK5SN / 9V1SM / VU3SNM,
South Australian Research and Development Institute
2 Hamra Avenue, West Beach
Adelaide, SA 5024
Australia
Postal address : PO Box 120, Henley Beach, SA 5022
URL:http://www.qrz.com/database?callsign=9v1sm




__________________________________
Do you Yahoo!?
Friends. Fun. Try the all-new Yahoo! Messenger.
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| 763|763|2004-06-10 16:50:57|Göran|Switching PS|
I use a Samlex 1223 23 A with my 210X and it works great.
Goran SM0YPT
| 764|764|2004-06-10 18:40:36|Jon Miccolis|Re: Atlas210x--> What's with all this spam all of the sudden?|
Hello,

I use a Atlas 180/Samlex 1223 combo without a problem. I get to conserve space in my shack and by no longer using the AR-117 console I have completely eliminated the problem of RF feeding back in to my audio. Overall a positive experience.

73!
Jon, kb9wvk
-----Original Message-----
From: K8DAD <toledohamradio@... Sent: Jun 10, 2004 9:17 AM
To: atlas210x-215x@yahoogroups.com
Subject: Atlas210x--
I too, am sick of the recent spam from cegdwdv115 and their co-horts.

If he wouldn't buy every Atlas 180, 210, 215 and power supply he
sees, maybe he wouldn't be so far in debt!

Regarding Atlas radios:
Is anybody using a 'switching'-type power supply with their Atlas,
rather than a linear power supply? I don't think it will make any
difference, but I thought I'd see what others have experienced. A 20-
amp switching power supply is less than have as big and heavy as a
standard 20A supply.

73's
JP






Yahoo! Groups Links
| 765|756|2004-06-24 02:53:04|flnkdkb106|Important News for atlas210x-215x Members|
I had really high interest rates on my home loan.
I saved thousands of dollars on home payments.
And you can too. Interest rates are as low as can be,
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This email was sent because you joined our group.
If you do not wish to recieve any emails, unsubscribe.
by sending a mail here atlas210x-215x-unsubscribe@yahoogroups.com
| 766|766|2004-06-24 14:16:30|Richter, Mike W|Stopping spammers - pls|
Could the Moderator spare us from this spam by doing the following

- Management
- Group Settings
- Messages
- Posting and Archives EDIT
- Moderation
- Check New Members
- Save changes

This minimises time taken by the Moderator because you won't have to approve every New Member, only to approve when they send a message for the first time

Mike VK2BMM
| 767|766|2004-06-24 14:18:48|Jim|Re: Atlas210x--> Stopping spammers - pls|
I'll second that...sick of it.

Cheers
Jim
-----Original Message-----
From: Richter, Mike W [mailto:michael.richter@...]
Sent: Thursday, 24 June 2004 10:16 PM
To: atlas210x-215x@yahoogroups.com
Subject: Atlas210x--

Could the Moderator spare us from this spam by doing the following

- Management
- Group Settings
- Messages
- Posting and Archives EDIT
- Moderation
- Check New Members
- Save changes

This minimises time taken by the Moderator because you won't have to
approve every New Member, only to approve when they send a message for the
first time

Mike VK2BMM



[Non-text portions of this message have been removed]
| 768|768|2004-06-24 23:34:14|roy|10 meter adjustment|
Has anyone had problems when lowering the 10 meter band. I want to
lower the start of 10 to 28.100 so i can monitor the beacons but
don't want to have trouble with the other bands.
thanks,
Roy,AA5FS
| 769|766|2004-06-24 23:56:47|Rick McKee|Re: Atlas210x--> Stopping spammers - pls|
It won't work ! I even unsubscribed from the group, and I still get the
junk from it ! yahoo sucks !

73
Rick
KC8AON

On Thu, 24 Jun 2004 22:16:28 +1000 "Richter, Mike W"
<michael.richter@... ________________________________________________________________
The best thing to hit the Internet in years - Juno SpeedBand!
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| 770|770|2004-06-24 23:57:34|Rick McKee|Re: Atlas210x--> 10 meter adjustment|
Haven't done it in a while, since I no longer own a 210, but all you need
to do is retune the 10 meter slug by first tuning the vfo until the
access hole in the dial drum is over the slug, and then adjust it where
you want it to be. I had mine set so thet it tuned all the way down to
28.0 !

72 / 73
Rick
KC8AON < Monthly QRP Field Day Group: http://www.smartgroups.com/groups/mqfd
Tri State Ham Traders Group: http://www.smartgroups.com/groups/tshtg


On Thu, 24 Jun 2004 21:33:40 -0000 "roy" <AA5fs@... ________________________________________________________________
The best thing to hit the Internet in years - Juno SpeedBand!
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| 771|771|2004-06-25 21:57:32|Kevin Murphy|Re: 10M adjustment|
Hi
The Oscillator will adjust down so that the unit covers the 28.00
-29.00 MHz section. I even think it goes down to the CB band. However
depending on the alignment of the RX and TX filters there may be a
falloff in TX power and RX sensitivity.I think there are some alignment
notes somewhere on the web or maybe in the yahoo group files?

Kevin
ZL1UJG

Find local movie times and trailers on Yahoo! Movies.
http://au.movies.yahoo.com
| 772|768|2004-06-26 04:37:58|john ainsworth|Re: 10 meter adjustment|
I know it can be done as my 210 was modified by RF Parts in Ca. +/- 16 years
ago and it works great! (I used it to WAS on 10m mobile in 1988.)
I still wonder if they can still work on a 210?
Still loving my 210!
73
John N5XYO

_________________________________________________________________
From �will you?� to �I do,� MSN Life Events is your resource for Getting
Married. http://lifeevents.msn.com/category.aspx?cid=married
| 773|768|2004-06-26 14:58:38|roy|10 meter adjustment|
Thank you all for your replies to my post.I think I'll try it out
this weekend and go on down to 28.000 for some cw too.Don't even want
11 meters got enough of that years ago.as for the spam its on all the
groups it seems. If the guy would get a job and stop sending spam
maby he coul pay his bills.Hi. 73's to all and thanks agin for the
help.. de aa5fs roy
| 774|774|2004-06-26 17:26:22|Rene Poitras|210X SSB Problem|
Hello All,

Just found the Group and hope you can help me with my SSB problem.
The Rig works great on all bands both SSB and CW EXCEPT....

On 80 meters I have very little visible audio output. It works great on CW
with lots of output. I have had this radio for about 20 years and has
always been weaker on SSB output on 80 meters. But lately I have to shout in
the mike to even see a slight movement and I get weak and poor reports. Any
suggestions would be greatly appreciated. Thanks.

Rene VE1CB....
| 775|775|2004-07-13 15:22:01|Maucka|buttons atlas 210x|
Good Morning friend´s,
I am new radio-amateur, witch one year of radio. Pay one altas 210x witch knobs broken, if some friend have these buttons, please enter in contact.

Sorry my english. Everything for radio.

yours truly

Carlos Alexandre - py5cac
vendas3@...
Tucano Comércio de Alarmes e Sistemas Eletrônicos Ltda.
R Des Antônio de Paula, 3577
81720-280 - Curitiba - PR (Brazil)
Fone/fax 41 286-2867
http://www.tucano2.com.br



[Non-text portions of this message have been removed]
| 776|776|2004-07-17 23:16:32|earlinclayton|adjusted my atlas 210x down to 27.5 mhz|
I adjusted my rig down to about 27.5. Thats as low as it will go.
I have the matching external frequency readout with mine.
I noticed a dropoff of power output abit. I didnt measure the P.O.
Just observed the current draw on transmit.
Havent heard any freebanders yet. I guess the band was dead when I
was listening. 73 Earl VE3AB
| 777|777|2004-10-05 03:26:57|dkfnjyclx|Important Letter for atlas210x-215x Members|
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If you do not copy and paste the above link into your web browser the saving process cannot be started.

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This email was sent because you joined our group.
If you do not wish to recieve any emails, unsubscribe.
by sending a mail here atlas210x-215x-unsubscribe@yahoogroups.com
| 778|778|2004-10-06 04:59:39|John P.|Atlas210x/215 Questions|
Question 1:
In an ATLAS 210/215 radio-related question, what position of the AGC dial and
MIC GAIN dials present the cleanest, yet most powerfull audio without clipping?
With the factory microphone, is the 3 o'clock position a good one?

Question 2:
What brand of relay have some of you had good success with when replacing the
transmit/receive relay?

73's
John






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Yahoo! Mail - You care about security. So do we.
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| 779|779|2004-10-06 05:37:15|Jim|Re: Atlas210x--> Atlas210x/215 Questions|
John, there are so many variations in components over the years it would be a brave person that could answer question 1. You'd need to have a peek on instruments or get an on air response.

Cheers
Jim
| 780|780|2004-10-06 19:57:21|Douglas|Re: Atlas210x--> Digest Number 272|
Hi John,
I think that the best proceedure for setting the ALC
is to key the transmitter in CW mode, adjusting mike
gain/drive until you are at full output. At that point
adjust the ALC until power JUST begins to drop off.
That will keep the ALC action correct.

I don't know about a relay replacement, never had one
go bad.

73,
Doug/WA1TUT



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| 781|781|2004-10-07 00:05:56|Rick McKee|(no subject)|
unsubscribe

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| 782|782|2004-10-11 17:50:25|Ron Hall|Finals|
What are the best resonably priced replacement finals to replace the
original cd2545 transistors?
| 783|783|2004-10-11 19:48:37|Rene Poitras|Re: Atlas210x--> Finals|
Ron KJ4CN,

Replaced my CD2545 with SD1452 in the early 80s. Still running
nice with great audio reports. They are listed at RF Parts in California.
My Atlas 210X is a keeper. Good Luck.

Rene VE1CB....

| 784|783|2004-10-12 18:55:13|Ron Hall|Re: Atlas210x--> Finals|
Thanks Rene. Someone told me that I could replace them with SD1405s
but I didn't know about the SD1452s. Did you have to do any type of
mods or was it just a straight replacement?

I would really like to hear your 210X on the air. Maybe we could
set up a schedule sometime.

--- In atlas210x-215x@yahoogroups.com, "Rene Poitras"
California.
the
| 785|785|2004-10-24 04:12:53|yv5grb|Low power on 10|
Dear group members,

I own a nice 210X (Serial TK-5930) but found out that it is running
on low power on 10 (5W). I checked the other bands (With a dummy load)
and here are the results:
80=75W / 40=70W / 20=70W / 15=50W / 10=5W

Any clue or idea will be apreciated.

73 de Eduard (YV5GRB)
| 786|786|2004-10-24 04:58:17|Rene Poitras|Re: Atlas210x--> Low power on 10|
Hi Edouard,

Have a few questions on your 210X.
1) was your output measured in CW position with carrier?
2) Did you use a dummy load and what was the SWR?

I had similar problems and now have lots of power. Some of the
capacitors needed to be changed on the audio input board. They are common
problems after many years. I can send you the information I have if you
wish. Just email me off the list as some information is a bit long.

Rene VE1CB.... 210X owner for over 20 years, great rig....

| 787|787|2004-10-29 11:44:58|byapioyvwew|alot less debt now|
hey all

I thought I would post this because they damn near took away almost all my bills. I think its worth at least checking out if you have too many bills...

http://grealus.com/adeh1







I posted this on atlas210x-215x, if you dont want to be a member anymore just email atlas210x-215x-unsubscribe@yahoogroups.com
| 788|787|2004-10-30 17:11:27|tdilover|Re: alot less debt now|
--- In atlas210x-215x@yahoogroups.com, "byapioyvwew"
many bills...
If you want to do us all a favor get lost. You are a crook.
James
anymore just email atlas210x-215x-unsubscribe@yahoogroups.com
| 789|789|2004-11-03 11:14:02|zl1ujg|Atlas 210x|
Hi
I have just seen a version of the 210x made for blind people. The
dial plastic cover is cut away and the dial has raised markings in
braille for the frequency. It looks as though it was factory done.
I havent heard about one before, so I assume its a bit of a rarity

Kevin
ZL1UJG
| 790|790|2004-11-03 22:56:05|osaeuypbsf|Important Information|
Refinancing your home is never easier and more profitable.
Our staff works exclusively to save you the most money as possible on any home loan.
We secure loans at better interest rates, for anyone anywhere. Do not miss out.

http://grealus.com/ajrhu
Please copy and paste the above link into your web browser.

Since interest rates are so low they will go up, you must act now.
http://grealus.com/azghu



This email was sent because you joined our group.
If you do not wish to recieve any emails, unsubscribe.
by sending a mail here atlas210x-215x-unsubscribe@yahoogroups.com
| 791|791|2004-11-04 02:42:07|g3vfp|Where On Earth!|
Where the devil did that last mail come from ?. Mr moderator you have
missed something !.

Dave G3VFP.
| 792|792|2004-12-01 06:04:38|phbavvrzckox|less bills|
hey,

Just wanted to share some info and see if I could help anyone else lower their mortgage payments, I saved nearly $200 off my monthly payment!

Takes two minutes take a look.

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I posted this on atlas210x-215x, if you dont want to be a member anymore just email atlas210x-215x-unsubscribe@yahoogroups.com
| 793|793|2004-12-01 16:26:25|K8DAD|What's Up with the Atlas group?|
Pretty quiet here lately - anybody doing anything interesting or make
any new discoveries about their Atlas 210 - 210X - 215 or 215X radios
lately?
73's
JP
| 794|794|2004-12-01 19:48:28|Jon Miccolis|Re: Atlas210x--> What's Up with the Atlas group?|
Nope -- no new discoveries but truly I can say that I LOVE my little 180!

Best 73!
KB9WVK

-----Original Message-----
From: K8DAD <toledohamradio@... Sent: Dec 1, 2004 8:25 AM
To: atlas210x-215x@yahoogroups.com
Subject: Atlas210x--


Pretty quiet here lately - anybody doing anything interesting or make
any new discoveries about their Atlas 210 - 210X - 215 or 215X radios
lately?
73's
JP







Yahoo! Groups Links
| 795|794|2004-12-02 04:31:02|peter oesterle|Re: Atlas210x--> What's Up with the Atlas group?|
How about anyone building external crystal oscillators for the 210x
for drift free mobile operation? Leif AsBrinck has a nice very clean
design for an oscillatoron his Linrad website.
I also changed 8 mixer diodes to 1n5711s WOW a whole new
receiver!!! Next trick will be minicircuits TUF3 dbms.
ANyone else do this?

73 Pete ve3hoh/w3

| 796|796|2004-12-02 18:34:05|John P.|Please tell us more about the Diodes|
Pete: Please tell us more about this change and on which boards!

Pete VE3HOH/W3 wrote: "I also changed 8 mixer diodes to 1n5711s WOW a
whole new receiver!!! ANyone else do this? 73 Pete ve3hoh/w3"




__________________________________
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The all-new My Yahoo! - What will yours do?
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| 797|797|2004-12-07 03:32:20|peter oesterle|Re: Atlas210x--> Digest Number 282|
OK here goes. The 1st mixer diodes d101-104 on pc100/c and 2nd mixer
diodes D201-204 on PC200/D were replaced with 1n5711 schottky diodes.
A rather noticable improvement in receive sensitivity occured after this
was done . Use an ohm meter to match up teh diodes or better yet use
an mcl tuf mixer. TUF3 is teh hottest one for HF at this time. Let me
know of your efforts!!

73 Pete ve3hoh/w3

| 798|798|2004-12-07 17:37:51|Göran|210X Mixer mods|
Re Pete Oesterle´s mixer mods ... < The 1st mixer diodes d101-104 on
pc100/c and 2nd mixer diodes D201-204 on PC200/D were replaced with
1n5711 schottky diodes. A rather noticable improvement in receive
sensitivity occured after this was done . Use an ohm meter to match up
teh diodes or better yet use an mcl tuf mixer. TUF3 is teh hottest one
for HF at this time. Let me know of your efforts!! 73 Pete ve3hoh/w3
Question Is a careful matching of the 1N5711 diodes critical? Would it
be easier (and even more rewarding) to go for a TUF-3 module instead?
Or a SBL-1 or TUF-1? Is such a modification more complicated? What do
others think?
73, Goeran SM4YPT
| 799|799|2004-12-09 09:59:25|zl1ujg|Mixer diodes|
Hi
I put hot carrier/ schottky diodes in the mixers some years ago . I
also reconfigured the mixers (and removed surplus components) so
that the LO ports are on the opposite sides of the diode quads (wrt
to the rf/if ports) which is similar to most packaged diode quads.
(such as Minicircuit ones) This improved the LO rejection by 15 to
35 dB but it degraded the carrier rejection to about 35 dB. This is
due to mistermination of the mixer port due to carrier oscillator
design. I tried a signal generator on the carrier port which
improved carrier balance to about 55 dB.
I have redesigned the carrier oscillator circuitry but havent tried
it in practice, due to many other projects

Kevin
ZL1UJG
| 800|799|2004-12-09 10:01:40|zl1ujg|Mixer diodes|
Hi
I put hot carrier/ schottky diodes in the mixers some years ago . I
also reconfigured the mixers (and removed surplus components) so
that the LO ports are on the opposite sides of the diode quads (wrt
to the rf/if ports) which is similar to most packaged diode quads.
(such as Minicircuit ones) This improved the LO rejection by 15 to
35 dB but it degraded the carrier rejection to about 35 dB. This is
due to mistermination of the mixer port due to carrier oscillator
design. I tried a signal generator on the carrier port which
improved carrier balance to about 55 dB.
I have redesigned the carrier oscillator circuitry but havent tried
it in practice, due to many other projects

Kevin
ZL1UJG
| 801|799|2004-12-11 01:14:13|peter oesterle|Re: Atlas210x--> Mixer diodes|
HI Kevin.

Excellent. YOu have gone further than i have in teh mods. With
respect to the termination of the mixer I was looking at a diplexer
arrangment as W1jr has outlined in some of the qrp notes found online
at qrpbuilders . Also I understand the carrier oscillator is quite
noisy too. Cleaning up thes 2 little problems would really make the
Atlas shine !!!
Thanks for your input and i would love to see the mods you have done .
73 pete ve3hoh/w3

| 802|802|2004-12-11 04:31:13|zl1ujg|Mixer|
Hi,
With respect to the diplexer termination. Diplexers will work well
if the termination is wideband. The LC filter following the mixer,
or in front of the first IF amp would misterminate the diplexer and
hence the mixer.I remember seeing an article online about diplexers,
possibly by W7ZOI.
I had thought of using a 50 ohm amp such as a MAV11, MSA1104,5 but
the specs indicate performance between 50 and 1000 Mhz and the gain
indicates a hike at the low end from 12 to 19 dB...Possibly a ERA6
may be useful.
Perhaps changing the 1st amplifier to a diplexer driving a J310(s)
Grounded gate amp...

The carrier oscillator possibly being noisy? Depends what you
mean... If you look at the output even on a CRO it is a distorted
square wave, due to low Q on the Carrier amp output circuit.
I have a circuit (untried) which uses most of the original
components in the Carrier amplifier, (but redesigned) to provide
cleaner (less harmonic output) and has an additional attenuator to
help terminate the mixer. Perhaps I should post it to the site

The second resason could possibly be that the 8v/10v regulator,
(which generate high levels of noise... actually measureable on a
CRO)has minimal capacitance on the output possibly introducing noise
into both the main and carrier oscillators. The regulator is fairly
heavily loaded so a replacement Low drop out (LDO)1 AMP or 500 mA
may help. Normal type regulators need 2volts or more Drop across the
regulator to work, without taking into account ripple, otherwise
variations on the input side transfer readily to the output side of
the regulator

Kevin
ZL1UJG
| 803|803|2004-12-17 22:30:21|zl1ujg|5.520 MHz|
Hi
I have added a folder to the files section. In the folder are
previous files I have generated. I have just added a file on the
5.520 MHz amp. Any feedback is appreciated (+/-)

I note that the 350XL circuit has a redesigned carrier oscillator
Amp circuit where a pi-type filter is used to match the amplifier
circuit to low impedance.

Kevin
ZL1UJG
| 804|803|2004-12-18 04:54:22|peter oesterle|Re: Atlas210x--> 5.520 MHz|
Hi Kevin.

Thanks for your input to the group. I also have 3 350xls in
various states of repair and disrepair. I am looking at removing the
switching diodes from teh crystal filter circuit. Possibly using relays.
It seems that the 350xl was what the drake TR4 could have evolved
into.
It sure was a great looking transceiver. I had compared it to my
kenwood ts 830 and i believe teh receive sensitivity of te 350xl was
right up there with the kenwood 830. Some audio mods would certainly
help teh 350 of course.

73 Pete ve3hoh/w3

| 805|281|2004-12-18 21:04:00|Douglas|Atlas 350XL|
It's good to see other postings about the Atlas 350XL.
IMHO it was easily their finest rig.

QST did a review of it and published receiver MDS
specs of -131 db. That's comparable with many current
rigs and far better than many.

The full QSK with the 350XL is also excellent - equal
to Ten-tec's.

I've had about 5 of them over the years. The only
gripe I have is that no two were exactly alike.
Apparently Atlas kept tinkering with the design.
It can make servicing a bit difficlut.

I'm currently trying to figure out the linear amp
keying circuit. Earlier ones used a relay contact
closure but later ones used a transister circuit as a
current sink to ground. Anyone played with that
circuitry?

73,
Doug/WA1TUT



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| 806|806|2005-02-06 23:54:45|K8DAD|Replacement of Relay|
Has anyone replaced their T/R relay in thier Atlas 210/215 radios?
Will any 3PDT relay work okay?
73's
John
| 807|807|2005-02-09 08:21:27|jawamz|Atlas 210X (Distortion on Strong Signals)|
Title says it all - I got this Atlas off the 'net and am generally
very pleased with it. It has an annoying habit - of distorting
signals that are strong (I only run dipole antennas) ... and I know
from earlier experience that this should not be the case. Are the
AGC diodes the likely suspects?? Any one out there with experience
of this problem??

Richard
(VK1RJ)
| 808|808|2005-02-09 08:25:05|jawamz|Changes in frequency (Atlas 210x)|
Further to my earlier post ... the marker generator seems to drift a
little ... and stations that are on known frequencies need to be
found. NO problem staying ON frequency for several overs ... but
the fine adjust sometimes needs big adjustments to bring the dial
calibration into shape. Is this a known problem (after 20 years?)

Richard
(VK1RJ)
| 809|809|2005-02-10 10:02:42|zl1ujg|Distortion on srong signals|
Hi,
My own testing reveals that the signals that enter the AGC detector
are already heavily clipped due to bad design around the AF
amplifier/ detector circuitry.
The AF signal entering the detector should be from a lo Z source
such as a emitter follower. Fortunately there is a spare stage in
the CA3086 not being used. I redesigned the stages and have non
distorted signals entering the detector and also take the AF amp
feed from the same point.

Kevin
ZL1UJG

If there is sufficient interest will scan appropriate notes to the
files section.
| 810|809|2005-02-10 10:55:01|SM0YPT|Re: Atlas210x--> Distortion on srong signals|
Please do Kevin!
SM0YPT Goeran

zl1ujg wrote:

| 811|811|2005-02-10 11:36:26|Irena & Richard Jenkins|Distortion on Strong Signals (Continued)|
Yes, I'd be interested in a modification to improve AGC action. I was
thinking around the problem, wondering if the AGC diodes can become 'leaky'
in their old age ... and so upset the IF stages they are controlling. I
tried a substitute loudspeaker ... but the distortion is still evident on
signals from about S7 upwards. It is considerably improved if I back off the
RF-gain control. Certainly this distortion was not a 'feature' of the first
210X I owned about five years ago. So, I am wondering if sometime during
this one's life it has been in a hot car or something ... leading to a
component breakdown. Straight forward to try and remedy ... just substitute
known good ones...??

IIRC - After a couple of hot days in my car (4-wheel drive) the first radio
went all funny. Eventually I diagnosed a failure in the capacitors in/around
the AGC area and replacing them got the show back on the road. Certainly if
the AGC stage plays up it can lead to distortion on strong signals.


73


Richard
(VK1RJ)
--
--
Irena & Richard Jenkins
Canberra, AUSTRALIA
+++++++++++++++++++++++++++++++++++++++++++++
| 812|809|2005-02-10 13:23:04|peter oesterle|Re: Atlas210x--> Distortion on srong signals|
I would love to see these improvements!

73 Pete ve3hoh/w3

| 813|809|2005-02-10 14:12:02|Mark Hill|Re: Atlas210x--> Distortion on strong signals|
Kevin,

Over the years, I have got used to the sound of the Atlas AGC struggling on
big signals and distorted audio peaks on RX. Never had the time to look
into fixing it. I understand that there were some mods. suggested by Atlas
to the ACG circuitry on early models (180/210?), but I don't think these
were as you have done.

Your mod. to the audio chain sounds very sensible. Do you find the audio
from the RX much smoother now even when the AGC is being hit hard? I for
one would be interested to take a look at the detail of what you have done.

Regards.

Mark.

-----------------------------------
At 08:02 10/02/2005, you wrote:


********************************************************
Mark Hill - G4FPH
E-mail: g4fph@...
New web site: www.qsl.net/g4fph
Old pages mirrored on: www.g4fph.freeserve.co.uk

Dipoles resonant on 1940/3700/7080 kHz
2 ele delta loop beam resonant on 14180 kHz

Remember: A Texas Gallon is actually less than a UK one!
********************************************************
| 814|809|2005-02-12 23:17:54|zl1ujg|Atlas210x--> Distortion on strong signals|
Hi,
I am still putting together the document regarding the AGC. Sometime
next week hopefully.
It certainly sounds better. My atlas 210x is a work in progress.

However the MC1350 IF chip has only moderate gain control ~60 dB
control. I think I posted a untried mod (in the files section) which
fits a PIN diode attenuator across the primary of the transformer on
the IF chip output.
This should increase AGC range.
It is interesting to note that the Elecraft K2 has a MC1350 as an IF
amp. They fit a Crystal filter afer it. This would reduce the
wideband IF noise and reduce apparent harmonic distortion (when AGC
range is exceeded).
Most AGC systems dont work well or sound very good toward their
maximum. Having excess AGC capability means distortion is lessened
under normal conditions.

PS can someone capture the clipped AF waveform on pins 1,5 of the
AGC audio amp. Either from a digital camera pointed to a
Oscilloscope screen or a scope download.
I can generate the waveform with the modified cct but dont have an
original unit now.
| 815|815|2005-02-15 14:54:03|Chuck|Was low power now ocillates|
I followed Rene VE1CB's advice and replaced the caps in the mic preamp
circuit.

Now it modulates, but also (I assume)it ocillates. When the mic is pressed
the meter moves between zero and about eight amps. I do not have another
radio to listen to the signal, SO??

Anyone have any ideas, I am going to try the PA ocillation mods. I don't
think thats it, but may as well try.

Any and all ideas welcome. It worked about 9 years ago when my wife
purchased it for me as an incentive to upgrade. Now that I have, I want to
use it.

FWIW the SN is TK3989 (on the paper sticker).

Thanks in advance

Chuck KE4ETH
| 816|816|2005-02-16 00:41:20|Jim|Re: Atlas210x--> Was low power now ocillates|
Chuck, the radio can oscillate for a number of reasons, most of them related to low drive levels. Trying to align it without even a receiver is a tough one. Good luck.
Cheers
Jim


[Non-text portions of this message have been removed]
| 817|789|2005-02-16 22:27:32|Joe Trachier|Re: Atlas 210x|
--- In atlas210x-215x@yahoogroups.com, "zl1ujg" ATLAS MADE A BLIND VERSON OF THE 210X & 215X

JOE TRACHIER
KD3UE
trachier@...
| 818|818|2005-02-17 06:34:12|zl1ujg|Braille 210X|
Thanks for the reply Joe,
Hi
The Atlas Solid state transceivers seem quite common here in NZ. I
think they came here at the right price and the right time. When I
lived in the UK I think Atlas were competing against the KW
transceivers and also the Japanese transceivers so didnt impact on
the market as much.
I picked up a Swan 100MX about a year back

On another note, with repect to the AGC/Demod
I looked at the 5.520 MHz Crystal Oscillator with a Spectrum
analyser. I put the oscillator direct into the analyser and saw
harmonics up to about 50 MHz, which was expected with the minimal
filtering.
The 5.520 MHz level in SSB mode (TX) was about +10 dBm (10 mw), the
level in CW mode was about +8 dbm (6mW), [crystal pulled] but the
level when used in RX mode, where the bias changes was about +1.8
dBm (1.5 mW). If I remember correctly there is a 47 ohm in series
with the diode balanced demodulator ( using 1N4148s), so this is
probably barely operating due to oscillator starvation. I had
changed the diodes for Schottky ones previously, which would no
doubt improve the demodulator operation at this low oscillator level.

Kevin
ZL1UJG
| 819|819|2005-02-18 22:57:33|Bill Nourse|What could it be?|
I hadn't used my 210X in a long time but when my TS-520 was killed by
lightning I dug the Atlas out. It has the outboard digital display,
so the shorting plug isn't used.

Forgetting this, I rummaged around in my desk, found the shorting
plug, absent-mindedly plugged the shorting plug into the accessory
socket on the other corner of the rig, and keyed the mike. I heard
a "pop." No Rx, no Tx.

Any ideas on what might have popped? Is there anybody who likes to
work on these things?

Bill WA4ZHH
| 820|819|2005-02-19 13:04:43|uwsievers@web.de|Re: Atlas210x--> What could it be?|
Hi Bill,
in which socket did you put the plug?
There are 2 socket on the rear side.. the left one (looking from the front of the Atlas) in
which the digital display is plugged is the right one... on the other side is the wrong one!
If you have no experience with repairing electronic devices you should ask another ham
nearby to take look into the Atlas.... where do you live... I will be in Ormond Beach, Fl
from March to April..
73,s Uwe DJ9XG


| 821|819|2005-02-19 17:44:39|Bill Nourse|Re: Atlas210x--> What could it be?|
The wrong one, of course. The digital display was already plugged into
the one where the shorting plug would have gone

That's the one I put the shorting plug in -- the one marked "AUX." I
guess it wouldn't have been a problem if I hadn't keyed the microphone,
but I did.

I've got a line on a ham in Washington state who works on these things
but haven't had time to connect with him. I was an aviation electronics
tech in the Navy but that was a long time ago and I don't like to stick
soldering irons in that kind of stuff now. I'm guessing someone who was
really good with schematics could look at the circuit and figure out
exactly what would blow if someone did what I did.

I'm in Memphis, Tennessee.

Bill WA4ZHH

--
Deacon Bill Nourse, Ed.D.
Diocese of Memphis in Tennessee (USA)
http://www.billnourse.com

"War is an ugly thing, but not the ugliest of things: the decayed and degraded state of moral and patriotic feelings which thinks that nothing is worth war is much worse. A man who has nothing for which he is willing to fight: nothing he cares about more than his own personal safety: is a miserable creature who has no chance of being free, unless made and kept so by the exertions and blood of better men than himself."

-- John Stuart Mill
| 822|819|2005-02-19 19:29:09|uwsievers@web.de|Re: Atlas210x--> What could it be?|
Hi Bill,
my guess is that you have burned the contacts of the relay installed on the PC1100A
board which is installed in the PA-compartement... to get access to it you must remove
the PA-Unit which ist on the rear side of the Atlas... unscrew 4 screws and lift it away..
be careful not to break the wires connectd to it.. now you should see the relay in the left
upper corner (watching from the rear side).... there will be a contact burned and holding
the relay mechanical fixed to the tx-position all the time... with your plug you make a
short on the external amplifier contact... because the bridge between pin 2 and 3 in the
AUX socket is making a short from 13,8 V to ground when you push the PTT or the Key..
the result will be that all current from the PS is flowing thru this contact from 13,8V to
ground... that will burn the contacts in most cases... to bring it back to normal try to get
this burned contact to separate... then with the plug in the right position the unit should
work... no other defects should be there because of this malplaced plug.
73 de Uwe DJ9XG

| 823|823|2005-02-20 07:40:27|John P.|Re: Atlas210x not working anymore :(|
"Bill Nourse" <nourse@... Hi Bill, looking at the schematic, you may have shorted the "+13V" directly to
ground when you keyed it up as the shorting plug would have shorted pins #2 and
#3 together- which goes to the PC-1100 antenna relay board- but the relay would
have connected pin 3 to ground on relay energization.
My suggestions:
1- remove shorting plug from AUX plug and plug into the correct socket.
2- the antenna relay probably has a welded contact leaving the relay
permanently shorted to ground, so replacement of the relay is likely if your
fuses didn't go fast enough - may have lost your voltage regulator too.
3- See if you can get your rig to Florida for a look over from somebody's who's
seen a lot of them.
Best of luck - and - please let us know what you've found out about the cure.
73's
John




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| 824|824|2005-02-21 18:46:24|zdenko tomić-ferić|Re: Atlas210x--> Re: Atlas210x not working anymore :(|
Hi 73 to all owner of Atlas 210x
I am interested for digital display for my 210 x
tks for any� suggest abot it. Zdenko 9a2wt



zdenko.tomic-feric@...
-- Posjetite http://www.pogodak.hr hrvatsku internet tra�ilicu, pretra�ujte hrvatski internet
pametnije - Pogodak! Tra�i pametnije!


[Non-text portions of this message have been removed]
| 825|825|2005-03-26 04:08:25|pebjag|Anybody know where to get a mobile mount for 210x?|
I need to put this in my jeep, but since the jeep is a ragtop, I don't
dare to leave it mounted, so I'll have to pull it out for daily
driving and slide it in for off-road and camping and Boy Scout trips.

If nobody has a line on an available slide mount, anybody got
dimensions so I might be able to fabricate one?

Thanks,
PEBJAG
| 826|825|2005-03-26 04:46:45|Earl Needham|Re: Atlas210x--> Anybody know where to get a mobile mount for 210x?|
At 07:07 PM 3/25/2005, pebjag wrote:


'Way back when, I used a CB "slide mount" on my Honda God Wing for
just this. You might still be able to find them in a truck stop CB shop or
similar.

7 3
Earl


Earl Needham, KD5XB, Clovis, New Mexico DM84jk
http://kd5xb-2.no-ip.info
| 827|827|2005-04-18 02:48:56|chuck hawks|Flakie PC-200 Board|
Well, finally broke down and purchased a used Tektronix (564B Storage)
($10.00 - but it works) 'scope so I could monitor the Mic In/Out on the
board.

I sometimes have output from the board.At that time I have power.

I replaced the 'lytic caps in the amp section.

Anyone else have a intermittent audio problem?

Any pointers or ideas?

TIA

Chuck
KE4ETH
| 828|828|2005-04-20 00:46:00|PEB JAG|Repairs?|
Who's the most reputable and reliable person out there
who repairs Atlas 210x radios? I haven't got the
time, tools, or experience to try it myself, and
camping season's almost here! RF Parts used to repair
Atlas rigs, but they don't any more (I checked).
Thanks for any tips!
- Dave
WB1CDG





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| 829|829|2005-04-20 01:23:00|gordon groves|Re: Atlas210x--> Repairs?|
Hi Dave:
Try KK7TV in Phoenix, Arizona. He did a great job on my Atlas for a resonable price. www.kk7tv.com. Good luck.
73, Gordon K3GG
| 830|830|2005-04-23 15:49:17|kiheiman_98|For Sale - Atlas Crystal Filter|
This appears to be the SSB crystal filter for the later model 210x and
215x transceivers. The label says 5.645 - 2.7/8. My Atlas 210X uses
the 5520 Khz IF, so I cannot use this filters. $25 plus shipping.

73
Clint
W7KEC
| 831|831|2005-05-02 04:01:11|xbjnwhydbog|Current Information|
Trust me it has never been easier to refinance your home loan at a better interest rate saving you thousands. Check out this free service. http://allapprovelender.com take 30 seconds and fill out this free form
| 832|832|2005-05-02 15:11:25|John P.|Atlas Rig Antennae?|
Anybody using a 'sloper' antenna with their Atlas 210/215 rigs?
How's the performance?

Also, anybody have any helpful hints on 'good' settings of the Mic Gain and ALC
controls on the Atlas rigs?

73's
JP

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| 833|833|2005-05-02 16:08:55|Joe Trachier|Re: Atlas210x--> Atlas Rig Antennae?|
John..
On My Atals 210-X the Mic Gain Is Set With The Marker On A of Gain,, And The ALC set Top Center.. I run About 50 Watts Out..Thru A dipole..
Using The Atlas And My Drake Thru My Sb-220 I have No Problems With Performance

Joe KD3UE
trachier@...
| 834|834|2005-05-11 00:22:00|Paul|Atlas RX 110/TX 110|
Need a copy of the manuals for the RX 110 and TX 110. Also need the TX
110 transmitter if you have a spare one lying around (right).
Thanks,
Paul
KS2S
| 835|834|2005-05-11 05:00:30|Paul|Re: Atlas RX 110/TX 110|
--- In atlas210x-215x@yahoogroups.com, "Paul"
Regards to the group.
Paul
KS2S
| 836|836|2005-05-11 05:27:53|Irena and Richard Jenkins|Distortion on Most Signals:Atlas 210x|
Title says it: my 210x is distorted by all but the weakest of signals. I
have an OCF dipole ... so absolute signal levels are normal. I am thinking
that something is wrong around the AGC circuit. Reducing the RF-Gain helps a
bit ... but what components in this circuit need checking/replacing do you
think??

73

Richard
--
--
Irena and Richard Jenkins
Canberra, AUSTRALIA
_______________________________________________________________
| 837|837|2005-05-11 05:32:41|Jim|Re: Atlas210x--> Distortion on Most Signals:Atlas 210x|
I'd take a peek at the electros on the appropriate boards.
Cheers
Jim
VK4BBG
| 838|838|2005-05-11 17:41:32|Paul|Atlas logo|
Does anyone have an ATLAS logo in jpeg that they could send me
Thanks
Paul
KS2S
| 839|839|2005-05-13 18:49:37|Earl Needham|Just got this|
This smacks of an urban legend, but Listowner please be on your toes!

7 3
Earl


Earl Needham, KD5XB, Clovis, New Mexico DM84jk
http://kd5xb-2.no-ip.info

For you dog lovers: Proheart 6 is DANGEROUS and your dog may not survive!

http://www.fda.gov/bbs/topics/ANSWERS/2004/ANS01312.html
http://www.spoiled-paws.com/ph6.htm
http://bewareofproheart6.freecyberzone.com/

All (and more) found via
http://www.altavista.com/web/results?itag=ody&q=%2B%22proheart+6%22&kgs=1&kls=0
| 840|840|2005-05-14 18:20:27|PEB JAG|Re: Atlas210x--> Digest Number 307|
NOBODY should fall for this!
Yahoo can make anybody on their staff a manager if they want to! They sure as shootin' wouldn't need the existing list manager to do anything affirmative to make it happen. I can't believe anybody would be gullible to fall for this!
- Dave WB1CDG


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| 841|841|2005-05-15 23:48:08|PEB JAG|CS-220 manual?|
I picked up a CS-220 (PS 4761 H) on Ebay. It's got a
built-in VOX. I'd like to find a manual (photocopy or
digital ok). I surfed around hoping to find one
posted online somewhere, but couldn't find one.
Anybody got one posted out there?
Thanks,
- Dave WB1CDG




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| 842|842|2005-05-16 18:45:02|Paul|Atlas RX-110|
I have an RX-110 receiver which looks totally different than a picture
I have of another RX-110. Evidently there were 2 different 110's made.
Anybody know anything about them?
Thanks,
Paul
KS2S
| 843|843|2005-05-16 19:30:15|Douglas|CS-220 manual|
Hi Dave,

Good luck in finding one.
I also have a CS220 with VOX and searched for about a
year for a manual or just a schematic for the VOX.
I was never able to locate one. I finally sat down and
drew a free hand sketch of the apparent circuit.
For some reason, the prior owner had chopped most of
the input/output wires to the circuit board. When I
got everything reconnected, the VOX seemed to work
fine.
It really makes CW operation feasable with the 210
series rigs.

Atlas also sold a stand alone vox unit, although I've
never seen one. It's probable that the schematic for
that would be the same.

I've got the same problem for my Atlas 350XL/PS350
combo. I have the deluxe version of the 350 power
supply with the clock/timer/phone patch installed.
I've never seen that schematic either.

73,
Doug/WA1TUT



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| 844|843|2005-05-17 19:55:51|guitradio|Re: CS-220 manual|
I have an original 210/215 manual and a separate but original, I
assume, installation instructions for VX-5 vox in Ac-console. This
icludes installation instructions for ovp-1 over voltage protection
kit too. These papers have shcematics for AR-117 power supply and VX-
5 VOX. I own the console with vox fitted in and it works. I've
bypassed power suppöy because it is still in US voltages and feed 12V
from other power supply to vox circuit. Are these the items you are
looking for? If so, I could scan them and put available. Esa, oh2ev.

--- In atlas210x-215x@yahoogroups.com, Douglas
| 845|10|2005-05-17 20:29:56|atlas210x-215x@yahoogroups.com|New file uploaded to atlas210x-215x |
Hello,

This email message is a notification to let you know that
a file has been uploaded to the Files area of the atlas210x-215x
group.

File : /Information from DF1DA/Atlas_CS220_VX5.pdf
Uploaded by : gerhardfwagner <Gerhard.F.Wagner@... Description : Manual, installation notes and schematics

You can access this file at the URL:
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Regards,

gerhardfwagner <Gerhard.F.Wagner@...| 846|10|2005-05-17 20:36:19|atlas210x-215x@yahoogroups.com|New file uploaded to atlas210x-215x |
Hello,

This email message is a notification to let you know that
a file has been uploaded to the Files area of the atlas210x-215x
group.

File : /Information from DF1DA/Atlas_VX5M.pdf
Uploaded by : gerhardfwagner <Gerhard.F.Wagner@... Description : Manual, installation notes and schematics for standalone unit

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Regards,

gerhardfwagner <Gerhard.F.Wagner@...| 847|847|2005-05-17 20:41:48|John Thibadeaux|Atlas Digital Dial DD-6|
Anyone have a Atlas digital dial, Model DD-6, they want to sell?? or anyplac
to look besides E-bay???contact me at jrt967@...--any help or
suggentions will be appreciated Thanks --jt--- PS for 210X



From the Hill
John Thibadeaux
75/76 FJ40
NH7FJ

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| 848|848|2005-05-18 04:31:50|Glen Farough|Re: Atlas210x--> Atlas Digital Dial DD-6|
Hi John,

This looks like the real deal for ur Atlas 210x ?

http://www.aade.com/Applic~1.htm#Atlas210

73 de Glen VE7LGF



John Thibadeaux <jrt967@... to look besides E-bay???contact me at jrt967@...--any help or
suggentions will be appreciated Thanks --jt--- PS for 210X



From the Hill
John Thibadeaux
75/76 FJ40
NH7FJ

_________________________________________________________________
Is your PC infected? Get a FREE online computer virus scan from McAfee�
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| 849|843|2005-05-18 09:14:54|Mark Hill|Re: Atlas210x--> CS-220 manual|
Douglas,

I have the circuit and text for the VX-5 VOX accessory. It's a 400k ZIP
file if you want it?

Regards.

Mark.

-----------------------------------------------
At 18:23 16/05/2005, Douglas wrote:


*******************************************
Mark Hill - G4FPH
E-mail: g4fph@...
Current web pages at: www.qsl.net/g4fph
Old web pages at: www.g4fph.freeserve.co.uk
-------------------------------------------
Dipoles resonant on 1942/3695/7065 kHz
2 ele delta loop beam resonant on 14180 kHz
-------------------------------------------
Remember - SIDE for HV safety:
S witch off
I solate
D ump
E arth
*******************************************
| 850|850|2005-05-21 19:28:46|John Thibadeaux|210x digital dial link|
Glen Farough <gfarough@... Glen---Thanks for the link for digital dial--will try to mount it in stand
alone configuation--thanks again--jt



From the Hill
John Thibadeaux
75/76 FJ40
NH7FJ

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| 851|851|2005-05-23 16:52:41|John P.|Digital Dial|
Can anybody report on what 'digital dials' they've had good success with their
Atlas 210/210x/215/215x ?
73's
John



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| 852|852|2005-05-23 21:12:41|Glen Farough|Re: Atlas210x--> Digital Dial|
Hi John P.

Here is a link for your digital display needs for Atlas Family...
Keep this with your favorites for all hamster radios...

http://www.aade.com/Applic~1.htm#Atlas210

73 Looks like the best deal...de Glen VE7LGF

"John P." <toledohamradio@... Can anybody report on what 'digital dials' they've had good success with their
Atlas 210/210x/215/215x ?
73's
John



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| 853|10|2005-05-30 22:10:06|atlas210x-215x@yahoogroups.com|New file uploaded to atlas210x-215x |
Hello,

This email message is a notification to let you know that
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Hello,

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Regards,

yv5grb <edresden@...| 855|855|2005-06-17 23:26:37|George|New member - a few questions|
Hi gang,

Just picked up a 210x & have been working on getting things together.
New caps, mixer diodes on order, and of course a thorough cleaning and
alignment. Already I am impressed with the little rig!

I have a few questions, though...

1) Does anyone know a source for the display drum? Mine's cracked and
probably won't last forever.

2) I see the AADE digital display page - what kind of practical advice
do folks have with them? Does the display fit in the existing window,
or will metalwork be necessary?

3) My SWR foldback circuit doesn't seem to work. I can adjust the
trimpot into a dummy load and get from near zero to full output, but
no foldback under high SWR. Any pointers? Still have the original
finals - get 75w on 80m into the dummy load.

4) Thinking of replacing the finals anyway; any hints & kinks? I have
a matched pair of MRF454s.

Thanks!

George
| 856|856|2005-06-17 23:50:15|Jim|Re: Atlas210x--> New member - a few questions|
Hi George, where are you adjusting the swr from ?
Cheers
Jim
VK4BBG


[Non-text portions of this message have been removed]
| 857|856|2005-06-18 14:43:24|George|Re: Atlas210x--> New member - a few questions|
--- In atlas210x-215x@yahoogroups.com, "Jim"
I was adjusting the SWR by deliberately mis-aligning my antenna tuner.
Didn't seem to make much difference in the output.

Thanks,

Geo
| 858|858|2005-06-19 00:39:08|John P.|Re: Atlas210x-->questions and comments|
Hi - Question:
George wrote: "... mixer diodes on order..."

If you replace the mixer diodes, do you have to realign the rig, or will it
just take off after you solder them in?

I believe many have had to buy a 'junker' 210 to get the drum :(


I'd like to know this too.

73's
John K8DAD





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| 859|858|2005-06-21 03:03:34|George|Re: Atlas210x-->questions and comments|
--- In atlas210x-215x@yahoogroups.com, "John P."
John, after replacing mine I had to rebalance the carrier, but not
realign the whole receiver.

Reception seems improved, with a generally quieter sounding front end.
I don't have any way to measure S/N, but it seems better. S-meter
readings of the calibrator signal seem about the same, maybe a little
better.

Geo
| 860|360|2005-06-25 01:41:32|Paul|Re: Atlas210x--> Former Employee of Atlas??|
be
I found this message in going through the archives. Is Stu,/K4BOV
still on the list. I would very much like one of the business cards as
I am an Atlas collector.
Paul
KS2S
| 861|861|2005-06-26 16:08:27|Paul|Consoles|
Can anyone tell me the difference between the AR-117 console and the
220-CS console? I know the th AR-230 console is 117 or 230 volts. Do
the 3 consoles look alike?
Thanks
Paul
KS2S
| 862|861|2005-06-27 01:10:26|Ken Burchfield|Re: Atlas210x--> Consoles|
Paul,
I can not tell you just what the difference if any
would be. I have a 220-CS the info on the AR-117
appears about the same circut and cabinet looks the
same.
The circuit should be found in the Atlas 180 pdf.
should be able to find it at this site:
www.davepick.btinternet.co.uk/atlas/180man.pdf

The circuit for the 220-Cs should be found at the site
for Atlas 210.

If I can be of more help let me know.
73 Ken

--- Paul <ultrafixedwing@...
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| 863|863|2005-06-27 02:10:36|k5jxl|Atlas Radio manuals and Data|
I have added to the links info.
a site that has good information.
73
Ken
| 864|864|2005-06-27 16:02:11|K8DAD|How do you set Carrier Balance|
What's the proper way to adjust the 'carrier balance' by diodes 101-104
on the Atlas 215/210 rigs? (without noise blankers)

Thanks & 73's
John
| 865|864|2005-06-27 22:45:08|k5jxl|Re: How do you set Carrier Balance|
John, and others interested in Atlas Service Bulletins:
I uploaded to the File section pdf: ATLASSB.pdf
This in Service information;
John, in this file is a section that explains the procedure to set the
carrier balance.
Hope this will help.
I also added the Link to this web site.
http://www.hamanuals.com/

73 Ken

--- In atlas210x-215x@yahoogroups.com, "K8DAD"
| 866|866|2005-07-01 13:30:53|George J Molnar|Right Angle Adapter|
Anyone have, or know a source for, the PC-100 right angle adapter? This is
the card extender that permits adjustment of the PC-900 trimmers.

Thanks!

George



George J. Molnar
Chicago, USA
| 867|867|2005-07-03 22:24:46|Paul|MT-1 mobile transformer|
Does anyone have a schematic for the MT-1 Broadband Transformer?
Thanks,
Paul
KS2S
| 868|868|2005-08-13 04:41:22|wb2aze|Atlas radio in Falklands|
Hello all, I remember reading somewhere that a ham had an Atlas 210x
with him during the Falklands war in 1982, and that he hid his radio
during the occupation and provided the UK with updates with it. I
believe he had to pack the radio and move it daily to keep from being
discovered. I did a search on the web and can no longer find the
article on it. Does anybody here know of it or can provide me with a
link to it?

thanks

Dave WB2AZE
| 869|869|2005-08-14 02:16:02|John P.|Re: Atlas210x--> Digest Number 323|
I remember that hams got their messages out, but don't remember much more than
that.


that a ham had an Atlas 210x
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| 870|868|2005-08-16 01:44:28|chuck hawks|Re: Atlas radio in Falklands|| 871|869|2005-08-16 02:38:16|PEB JAG|Re: Atlas210x--> Digest Number 323|
I dunno about documentation, but I had a conversation with Herb Johnson about it before I shipped overseas (1992?), and that's the scoop he told me! He also mentioned one of the Kon-Tiki boats used an Atlas, too. I was sorry to hear he passed before I got back to the US.
:-(
Where he got that info, I can't say... but if you knew Herb, he wouldn't have made it up!
Sorry I can't give you a written source.

- Dave
WB1CDG


atlas210x-215x@yahoogroups.com wrote:

There is 1 message in this issue.

Topics in this digest:

1. Atlas radio in Falklands
From: "wb2aze"


________________________________________________________________________
________________________________________________________________________

Message: 1
Date: Sat, 13 Aug 2005 02:39:52 -0000
From: "wb2aze"
Subject: Atlas radio in Falklands

Hello all, I remember reading somewhere that a ham had an Atlas 210x
with him during the Falklands war in 1982, and that he hid his radio
during the occupation and provided the UK with updates with it. I
believe he had to pack the radio and move it daily to keep from being
discovered. I did a search on the web and can no longer find the
article on it. Does anybody here know of it or can provide me with a
link to it?

thanks

Dave WB2AZE





________________________________________________________________________
________________________________________________________________________



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[Non-text portions of this message have been removed]
| 872|868|2005-08-19 21:58:13|wb2aze|Re: Atlas radio in Falklands|
That was it Chuck, Thanks 73 dave



--- In atlas210x-215x@yahoogroups.com, "chuck hawks"
radio
I
with
| 873|873|2005-08-20 17:22:40|John P.|Atlas 'Little Giant'|
Hi all,
Is there any reason somebody couldn't 'pick-up the ball' that got dropped and
manufacture the Atlas 400 now? Is all the information still available? I
remember hearing that the project got cancelled in a big mess, but why not now?
If this radio could be built today for $500 you'd be able to sell them like
hotcakes.
Think about it all you inventive types out there. could we built the Little Giant?

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| 874|873|2005-09-08 02:30:13|tdilover|Re: Atlas 'Little Giant'|
Give me a Atlas 400 with general coverage receive, count me in. Just
thinking it's out already Elecraft K2, but over priced and you have
to put it together.

tdilover
| 875|875|2005-09-12 12:35:35|py2uat|New Atlas 210x|
Hi, would be possible construct Atlas 210x for 40m band + Linerar QRP
10w with Mosfet?

Thank You!
Uelson - PY2UAT
| 876|876|2005-09-13 14:12:10|atlas210x-215x@lfyalpha.com|Follow my advice|
Refinance your home now, take 30 seconds and fill out this free form.

http://gorefiwglncv.usaweb.nu/


[Non-text portions of this message have been removed]
| 877|877|2005-09-14 16:19:34|Lynn Stolz|ATLAS repair service?|
Hello all,

This has probably been asked a million times before
... Is there someone in the U.S. that performs repairs
on ATLAS equipment?

I have acquired a couple of units that I'd like
checked out/fixed. One is an model 180 which appears
to have lost the 5520 kHz carrier oscillator. The
opposite SSB works just fine. The problem is that
nobody uses USB on 160-80-40 and LSB on 20! The other
is a really nice late model 210X with the 5645 kHz
i.f. that the receiver appears to be a little deaf.
It receives OK, but another 210X that I have seems to
have a much hotter receiver.

Thanks in advance for any information any of you may
have.

Lynn, N8AJ

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| 878|878|2005-09-14 16:41:55|John P.|Mod to Atlas 215 ?|
If you were to make just one mod to an Atlas 215 - what would it be?

Mine has pretty good 'ears' on 80m & 40m, but it seems nearly deaf on 20m and
15m bands. 160m has just a handful of signals. Antenna/antenna tuner issues,
or in the transceiver?

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| 879|879|2005-09-14 17:08:30|gordon groves|Re: Atlas210x--> ATLAS repair service?|
Try Randy at randy@.... He did a great job on mine
Gordon K3GG
| 880|879|2005-09-14 17:11:58|gordon groves|Re: Atlas210x--> ATLAS repair service?|
Or bring up www.kk7tv.com.
Gordon K3GG
| 881|879|2005-09-14 19:05:48|RUDOLPH KING|Re: Atlas210x--> ATLAS repair service?|
Hello Lynn:- contact TCESI@... Rudy king
| 882|878|2005-09-16 04:20:23|peter oesterle|Re: Atlas210x--> Mod to Atlas 215 ?|
change the mixer diodes to 1n5711 schottky diodes or replace the entire
mixer with a minicircuits TUF-3 .


| 883|878|2005-09-16 13:28:29|Irena and Richard Jenkins|Re: Atlas210x--> Mod to Atlas 215 ?|
On Friday 16 September 2005 12:20, peter oesterle wrote:
+++++++++++++++++++++++++++++++++++++++++++++++++++++++++

Okay, I 'll bite...

what would be the benefit of the substitution??

Richard
--
Irena and Richard Jenkins
Canberra, AUSTRALIA
++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
| 884|884|2005-09-17 21:50:12|peter oesterle|Re: Atlas210x--> Digest Number 333|
Lowers the receiver noise floor considerably . Wakes up the receiver very
nicely.


| 885|885|2005-09-18 21:18:31|zl1ujg|Atlas 210x/215x mods|
Hi,
The way I see it. One mod isnt enough...

The diodes are a good change, Good benefit on RX. Especially at the
product detector/tx mixer as on RX the carrier osc level is very low (
~ 1.5 mW) for 1N4148's. This would cause distortion at high rx levels.

I found the configuration of the mixers quite strange and rebuilt them
in the 210x I have. This improved LO rejection on TX and LO radiation
from the antenna on RX. (However carrier balance got worse)

There are high levels of harmonics (odd and even) on the carrier
oscillator. (The 350XL has a different cct). Even though the mixers
generate harmonics, they are primarily odd order. (A mod here should
improve carrier balance and improve harmonics)

The AGC detector requires rework. A square wave input will be observed
with a CRO at the AGC detector. Not good!! A reworked amplifier
(using the existing CA3086) provided a sinewave.

There are numerous other areas that require work as well...

I am not saying that the 210/215x is a bad unit, just that it is
showing some weak areas.

I may be off line for 3 or 4 days, and hence a delay replying, as
preparing for a funeral.

Kev
ZL1UJG
| 886|885|2005-09-18 21:49:19|Tom|Re: Atlas210x--> Atlas 210x/215x mods|
These weak points are mostly due to the time when the
radio was designed. Technology has given us much
better devices than were available back then. It
makes sense to update those devices where possible
like you suggested.
Tom

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| 887|887|2005-09-19 13:18:58|zl1ujg|210x/215x mods|
Hi,
Kevin ZL1UJG at /A location on laptop.

Newer devices doesnt necessarily equate with better performance...I
think it is the design of the circuitry around the devices that
determines the performance. Example If one uses a misterminated mixer
then IMD performance is degraded. (This may be apparenet on TX and RX
depending on design)

There are many later designs by multiple manufacturers that have design
problems.

Kevin
ZL1UJG
| 888|888|2005-09-19 17:21:11|John P.|Rebalance Mixer? / Best Diode?|
How easy is it to re-balance the mixer (and can it be done) after the diode
substitution? What's the best diodes to install?
73's
John




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| 889|888|2005-09-19 22:00:56|zl1ujg|Rebalance Mixer? / Best Diode?|
Hi,
If one replaces the original mixer diodes, then rebalancing the
modulator is easy as following the instructions in the manual.
Note there are a lot of other spurs, (as viewed on a spectrum
analyser) and ATLAS recommended balancing the modulator on 80m for
the 210x, but would assume 160m for 215x. This is to reduce the
possibility of balancing the carrier to a minimum, based a spur
level, rather than a carrier.
During mods to the mixers in my 210X, I found that the design of the
carrier osc buffer (5520 kHz) causes mistermination of the modulator
and reduces carrier balance. I have redesigned the buffer but not
reworked it due to other committments.
The diodes which other ops have used are 1N5711 which are a medium to
high barrier schottky diode. They are cheap and stations have
reported good results. They are similar to HP2800 diodes.
If you keep the 1N4148 diodes (1N270 diodes in earlier units From
memory) then one can refit them if you don't consider results
satisfactory.
From reports I think stations reported RX sensitivity gains of 2 dB
or more by just changing the diodes to 1N5711. However that isnt the
whole picture as IMD on Rx would be improved as the diodes would be
turned on harder during the oscillator cycles, due to the lower
barrier voltages in the diodes. A similar IMD improvement would
appear on TX but would be masked by linearity (non) in other stages.

Kevin
ZL1UJG
| 890|890|2005-09-21 03:19:12|peter oesterle|Re: Atlas210x--> Digest Number 336|
I have used 1n5711 schottky diodes. I tried to match them using just
an ohmeter. Just replace the In4148s dides D127 to D130 in the
bridge arrangement on board PC120. 1st mixer. On board PC200D replace
D201-204 with 1N5711s also. On board PC120 R135 is carrier balance.
Also C138 is phase balance (r101 and c103 on pc100 ) null the carrier with
these.
That should do it.
The other possibility is a TUF3 DBM from minicircuits . You can then
dispense with the discrete transformers for the atlas dbm. I believe they
are L125 and L126. I have not tried this yet but I believe the balance
will be better since the hermetically sealed dbm has matched diodes in it
already .
ZL1UG mentioned the spurs. I have not looked for any on my Atlas yet
but I will.
The spectral purity of the carrier oscillator and teh VFO ( LO) are not
too good. The QRP builder websites can be reviewed for some clean
oscillators. A good choice might be a vcxo for teh vfo . The LINRAD
site has a nice clean low noise oscillator possibly useful for the
carrier oscillator. A lot of possibilities exist for improvements and
experimentation. A fun aspect of the radio in my opinion!

73 Pete Ve3hoh/w3



| 891|888|2005-09-21 07:54:27|zl1ujg|Rebalance Mixer? / Best Diode?|
Hi
I posted some of the changes to the carrier osc in the files section
of this group some months back.
On my local oscillator, in the 210X I have, I changed the position of
the coupling cap between the oscillator transistor. The capacitor
went between the collector and the base of the next buffer amplifier.
The capacitor is now between the emitter of the oscillator transistor
and the base of the buffer amp. The value is increased up to between
100 and several hundred pF from memory.
This is at a point where circuit loading is less. Additionally the
emitter is at a capacitive divider connection, so that the harmonicss
are also divided down also. When the original point on the collector
is used, the reactance of the capacitor reduces with frequency and
harmonic level increases with frequency.
The comment about the TUF3(?) is good and would certainly would
improve results over the original configuration. I changed the
configuration of the mixers in my unit and would probably have
similar results to using TUF3.
An important note is that rejection of unwanted products/ balance is
highly dependent on having 50 ohm terminations on all ports. This may
be done by having attenuators or 50 ohm amplifiers on ports of the
mixers/modulators.
The rejection of unwanted products on TX is also dependent on IF
drive level to the TX mixer/product detector. I saw satisfactory
results with about - 7dbm into the IF port of that mixer.
Bye for now
Kevin
ZL1UJG
| 892|888|2005-09-21 12:07:22|peter oesterle|Re: Atlas210x--> Rebalance Mixer? / Best Diode?|
HI Kevin.
Very excellent posts regarding mods to the carrier oscillator. I do need
to try these. I have given some thought to addition of a diplexer after
the mixer. This would give the mixer a proper load at the IF freqs .
SOme have suggested using a Jfet such as a J310 to make up for filter and
mixer losses and providing a constant impedance over teh freq range of teh
IF.
ANy thoughts on using a SA602 for a detector?


| 893|893|2005-09-21 13:15:24|zl1ujg|Mixers and stuff|
Hi all,
From previous posting
"Very excellent posts regarding mods to the carrier oscillator. I do
need to try these. I have given some thought to addition of a
diplexer after the mixer. This would give the mixer a proper load at
the IF freqs .Some have suggested using a Jfet such as a J310 to make
up for filter and mixer losses and providing a constant impedance
over teh freq range of the IF.
Any thoughts on using a SA602 for a detector?"

My comments on the diplexer. I believe the complexity may not be
worth the effort. If one looks at the Elecraft K2, the RX IMD
performance is excellent just feeding into a bipolar amp, attenuator
and LC filter/Crystal filter arrangement.
If one uses a JFET such as a J310 as a post mixer IF amp, the gain
wouldnt be sufficient, and significant degradation in sensitivity
would be evident. A further gain stage would be required.
My belief is that the mixer should be fed into a Bipolar amplifier,
low value attenuator and LC filter network which matches into the
crystal filter. I think this may actually require less components
than currently fitted. (on the RF PCB using the noise blanker) The
Elecraft K2 manual has some schematics which may prove useful. Also
some of the W7ZOI (?) books have information.

I have configured the product detector using the existing diode
mixer. I think using a SA602 (gilbert cell type mixer) may prove
problematic, at least with Audio AGC. The IMD performance of that
mixer is low. Using audio AGC detection I believe there would be
transient overload occuring in the mixer, due to delays in
controlling the RX gain, due to long attack times. Even some IF AGC
detection systems have long attack times and similar problems may
still occur. It pays to have product detectors that have sufficient
headroom, such as in the case of diode mixers.

Kevin
ZL1UJG
| 894|894|2005-10-27 00:14:35|waward41|Any ideas on this problem?:|
A friend of mine gave me a 215X with no audio from the mic going into
the mixer. CW works fine with full output, but on SSb, very little
audio and no output. He already has replaced the IC in the mike audio
stage, but there is still not enough audio to reach mixer. What gives?
The only conponents on the board going to the mixer is a bypass cap,
and choke. The receive works fine, so I know the DBM is working on
receive.I can remember when this radio worked perfectly.
DE N4BLR
| 895|895|2005-10-27 01:53:14|Ric Bevi|Re: Atlas210x--> Any ideas on this problem?:|
Hello William N4BLR first pardon for my elementary English.... I would begin measuring if the pin 1,5 of Q202 in the board PC200 has 5,3v in TX SSB... if that is OK it would arm a small amplifier for example of audio with an IC LM386 and it would use it as meter of dynamic signs in the stages of Q202 that correspond the MIC to detect which is the stage that doesn't work...if not that it is the problem!!!. Good Luck!!!.
73's and Dx.
Richard. - LU8DRB -.

| 896|895|2005-10-27 02:08:33|Rene Poitras|Re: Atlas210x--> Any ideas on this problem?:|
I had similar problems with my Atlas 210X. Now works great. I can send you
my notes direct if you wish, off the list.. Let me know at VE1CB@... and
I can get in touch direct. Not a very expensive repair job to do.

Rene VE1CB....

| 897|897|2005-10-27 14:54:27|Mark Hill|Audio oscillation on RX|
Folks,

This is really lazy of me, but any excuse to say 'hi' to those on the
reflector!

My Atlas-210x has been in storage for a while and, on firing it up
the other day, I noticed it sounded strange on RX. Anyway, it's
clear that the RX audio stage(s) are oscillating at anything above
minimum setting of the volume control.

Of course, I should get the scope out and prod about, however the
scope is still in storage but the soldering iron is not! I'm
guessing that some decoupling around the LM380 may not be doing its
job, perhaps dried out electrolytic capacitors?

Has anybody had this one and if so, what was the fix?

Regards.

Mark.
*******************************************
Mark Hill - G4FPH
E-mail: g4fph@...
Current web pages at: www.qsl.net/g4fph
Old web pages at: www.g4fph.freeserve.co.uk
-------------------------------------------
Dipoles resonant on 1942/3695/7065 kHz
2 ele delta loop beam resonant on 14180 kHz
-------------------------------------------
Remember - SIDE for HV safety:
S witch off
I solate
D ump
E arth
*******************************************
| 898|895|2005-10-28 00:41:17|waward41|Re: Atlas210x--> Any ideas on this problem?:|
--- In atlas210x-215x@yahoogroups.com, "Rene Poitras" send you
VE1CB@R... and
Fine business
DE N4BLR
| 899|897|2005-10-28 00:46:06|trautfield|Re: Audio oscillation on RX|
Hi Mark

A friend of mine just had the same problem and we fixed it recently
on my bench. His would start oscillating at about 11 o'clock on the
volume control knob. After tracing things out with a scope, and
comparing results to my good working Atlas, we removed all the boards
that are mounted vertically. We cleaned all contacts at the bottom of
each board with alchohol. That helped a bit, but the final solution
was that one of the vertically mounted boards on the left side (I
believe) uses a metal brace to help support the board. But you will
notice is has (or should have) a star washer. Thats because that
brace also is a very important ground connection. Improving that
connection solved the problem entirely. I learned this from fiddling
around with Heathkit HW-8 qrp rigs. The mechanical connection between
the board and the chassis on those radios has to be solid and clean
or all hell breaks loose. Best of luck getting it back on the air.

Curt
KE6CDC


| 900|900|2005-10-28 08:50:08|breaux38|Noval Plugs|
Does anybody know of a current source for these gems?
| 901|897|2005-10-28 11:12:43|Mark Hill|Re: Atlas210x--> Re: Audio oscillation on RX|
Curt,

Thanks for the suggestion.

That sounds like just the sort of thing it could be. I can recall
the brace piece you mention and I think it's the one that comes off
the board with the LM380 audio amplifier on. I'll do a 'cleanliness'
check internally at the weekend and look for that star washer.

Regards.

Mark.

------------------------------------------
At 23:46 27/10/2005, you wrote:
*******************************************
Mark Hill - G4FPH
E-mail: g4fph@...
Current web pages at: www.g4fph.net
Old web pages at: www.qsl.net/g4fph
----------------------------------------------------------------------
Dipoles resonant on 1942 / 3720 / 7085 kHz
Three element wire beam coming soon on 14180 kHz!
----------------------------------------------------------------------
Remember - SIDE for HV safety:
S witch off
I solate
D ump
E arth
*******************************************
| 902|902|2005-12-07 17:14:56|Jerry|Driver 40446 need|
I could use a 40446 or suggestion on a sub. Tnx Jerry w9pb
| 903|902|2005-12-07 20:07:27|Mark Hill|Re: Atlas210x--> Driver 40446 need|
Jerry,

I recall a friend of mine, Dave, G3YXM, tried quite a few substitutes
for that funny little device when he replaced his output transistors
for ones that were more capable. See
http://www.davepick.btinternet.co.uk/atlas/mods.htm for
details. While I think typical CB-output types worked, they did not
seem able to produce the goods to the extent that the RCA device
does. Dave managed upwards of 150 W from his Atlas in the end, so
needed as much drive as he could get!

If you find a source for the RCA part, or any proven good
substitutes, please let the group know.

Regards.

Mark.

------------------------------------------


At 15:14 07/12/2005, you wrote:
*******************************************
Mark Hill - G4FPH
E-mail: g4fph@...
Current web pages at: www.g4fph.net
Old web pages at: www.qsl.net/g4fph
----------------------------------------------------------------------
Dipoles resonant on 1942 / 3720 / 7085 kHz
Three element wire beam coming soon on 14180 kHz!
----------------------------------------------------------------------
Remember - SIDE for HV safety:
S witch off
I solate
D ump
E arth
*******************************************
| 904|902|2005-12-07 21:06:30|Jerry Spears|Re: Atlas210x--> Driver 40446 need|
Thanks for the input Mark....
I have tried many devices and having good luck with MRF262. This is not a mechanical equivilant. I had to install a 2.7ohm resistor in series with the base to cool it off (oscillations) as it was designed for VHF work. Would like the rig to be original however.

Again tnx for the response....Jerry

Mark Hill <g4fph@... Jerry,

I recall a friend of mine, Dave, G3YXM, tried quite a few substitutes
for that funny little device when he replaced his output transistors
for ones that were more capable. See
http://www.davepick.btinternet.co.uk/atlas/mods.htm for
details. While I think typical CB-output types worked, they did not
seem able to produce the goods to the extent that the RCA device
does. Dave managed upwards of 150 W from his Atlas in the end, so
needed as much drive as he could get!

If you find a source for the RCA part, or any proven good
substitutes, please let the group know.

Regards.

Mark.

------------------------------------------


At 15:14 07/12/2005, you wrote:
*******************************************
Mark Hill - G4FPH
E-mail: g4fph@...
Current web pages at: www.g4fph.net
Old web pages at: www.qsl.net/g4fph
----------------------------------------------------------------------
Dipoles resonant on 1942 / 3720 / 7085 kHz
Three element wire beam coming soon on 14180 kHz!
----------------------------------------------------------------------
Remember - SIDE for HV safety:
S witch off
I solate
D ump
E arth
*******************************************




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| 905|902|2005-12-08 11:49:51|Mark Hill|Re: Atlas210x--> Driver 40446 need / Other modifications|
Jerry,

Thanks for the reply and the tip about the '262. Will look out for that one.

I doubt it will be possible to find a mechanical equivalent for the
RCA part - there's something about that package that just smacks of
'old' to me. I think the only other time I saw something in a
similar package was in the back of a Sony TV set about 20 years or more ago!

Fortunately I've not had to replace the driver in either of my two
Atlas yet, but am prepared for mechanical hassle should the day ever
come! On the subject of mechanical engineering, I do recall Dave
saying he had to enlarge the holes in the PA PCB to allow the bigger
flanges of the up-rated PA transistors to drop through. His is a
model 180 though, so perhaps this is not an issue with later models.

While I'm on the line, I came across a few more modifications for the
Atlas on this
site: http://www.xs4all.nl/~pa0fri/Mods/Atlas215/AtlasEng.htm The
mods. to the mixers look interesting. As with all such things, it
would have been nice to see some 'before' and 'after' measurements in
order to make a call on whether it was worth warming up the soldering
iron. Wonder if anyone on here has done any of the mods from this site?

Has anyone got to the bottom of the supposedly noisy carrier
oscillator? I recall one of our VK-colleagues (I think!) suggested
some changes to the carrier oscillator circuitry. Any 'before' and
'after' measurements out there for this one?

Regards.

Mark.

------------------------------------------
At 19:06 07/12/2005, you wrote:
*******************************************
Mark Hill - G4FPH
E-mail: g4fph@...
Current web pages at: www.g4fph.net
Old web pages at: www.qsl.net/g4fph
----------------------------------------------------------------------
Dipoles resonant on 1942 / 3720 / 7085 kHz
Three element wire beam coming soon on 14180 kHz!
----------------------------------------------------------------------
Remember - SIDE for HV safety:
S witch off
I solate
D ump
E arth
*******************************************
| 906|906|2005-12-09 08:00:10|zl1ujg|Supposedly noisy carrier|
Hi,
I think the mods about the carrier osc were from me, however I am not
a VK!! (~ 2000km away)
Mum passed away during September, so been keeping a low profile, since
then.
I would say the reports of a noisy carrier were done done during some
TX testing (by someone). When one sets the level of carrier/SSB this
done before the crystal filter. These stages are throttled back by
reducing bias/ or even back biasing the emitters. The signal is then
filtered by the crystal filter... However the MC1350 is still running
a full(ish) gain (~65 dB) and there is some small control of this with
ALC. However there is significant noise power due to this MC1350 being
in circuit. Most similar designs would run this MC1350 at considerably
lower gain
( only 6-10 dB for example) and then the stages between the balanced
modulator and the crystal filter could be run at a nominal gain for
both TX and RX.
The MC1350 could still have ALC control. If one feeds the AGC port of
the MC1350 with a preset resistor between a regulated TX supply and
ground, then one could set the gain of it during TX. I would think
that a diode from the wiper of the preset resistor is required when
feeding the MC1350. (This hasnt been done by me yet, but I recognise
the problem)
So it isnt a noisy carrier to speak of, but it is noise power that is
added to the signal.
The carrier oscillator also has problems but that is another matter

Kevin
ZL1UJG
| 907|907|2005-12-09 08:23:09|zl1ujg|Images|
I have added some spectrum images of the unmodified 5.520 MHz carrier
oscillator in the photos (or is it files...) section, under ZL1UJG.
The carrier oscillator amplifier, was fed directly into the spectrum
analyser.Note the large drop in level to 1.8 dBm (1.5 mW) during RX.
This is because the buffer amplifier is rebiased during RX.This level
is very marginal for correct operation of the RX product detector
(using 1N4148's)
During TX the level is ~ +10.3 dBm ( ~ 10mW) and CW this drops to ~ +8
dBm.(~ 6 mW) On CW this is due to pulling the crystal significantly
off frequency.
There is a large level of odd and even harmonics. Primarily due to the
low Q of the buffer amplifier circuitry (Operating Q less than 1). The
odd order harmonics are regenerated in the mixer due the diode action,
so they arent a worry, but the even order (2nd,4th,etc) are normally
at a low level in mixer operation, due to mixer balance.
I would aim for harmonics that are ~ 40 dB or better before connecting
a mixer to this circuit, which is what the amended buffer circuit
should do.(this is also in the ZL1UJG folder)
I just havent done it yet...on my Atlas

Kevin
ZL1UJG
| 908|907|2005-12-11 22:50:39|Mark Hill|Re: Atlas210x--> Images|
Kevin,

Thanks for the update.

I had a look at the images. Herb and the folks at Atlas must have
tried real hard to design an oscillator that dirty - yuk! I cannot
imagine it's very impressive close-in to the fundamental either.

Any idea why the bias on the oscillator is altered between RX and
TX? 1.8 dBm doesn't sound like enough to drive a ring mixer. I can
imaging that 'fixing' the carrier oscillator performance could make a
fair difference to the performance figures for the RX (which are not
to bad anyway, according to the Sherwood Engineering tests) and
perhaps even clean the TX up a little, close-in.

Keep up the good work!

Regards.

Mark.

------------------------------------------
At 06:22 09/12/2005, you wrote:
*******************************************
Mark Hill - G4FPH
E-mail: g4fph@...
Current web pages at: www.g4fph.net
Old web pages at: www.qsl.net/g4fph
----------------------------------------------------------------------
Dipoles resonant on 1942 / 3720 / 7085 kHz
Three element wire beam coming soon on 14180 kHz!
----------------------------------------------------------------------
Remember - SIDE for HV safety:
S witch off
I solate
D ump
E arth
*******************************************
| 909|909|2005-12-12 06:07:20|K8DAD|Great files from ZL1UJG|
Hey Kevin - ZL1UJG,

I'm very impressed with all of your files you've contributed - please
don't be a stranger and visit your Atlas 210/215 buddies here often!

Best of the holidays to you.
John
| 910|910|2005-12-12 07:12:00|zl1ujg|Notes|
Hi,

"I had a look at the images. Herb and the folks at Atlas must have
tried real hard to design an oscillator that dirty - yuk! I cannot
imagine it's very impressive close-in to the fundamental either."

Reply
I think they put a 50 ohm on collector to try to load the mixer
properly, then they put a LC across it to reduce the harmonics a
little... Could be done better. I dont think the carrier osc would be
too bad close in, although some extra uF on the +10v regulator o/p may
help


"Any idea why the bias on the oscillator is altered between RX and
TX? 1.8 dBm doesn't sound like enough to drive a ring mixer. I can
imaging that 'fixing' the carrier oscillator performance could make a
fair difference to the performance figures for the RX (which are not
to bad anyway, according to the Sherwood Engineering tests) and
perhaps even clean the TX up a little, close-in."

Reply
I dont know why the dropped the LO level on RX. And certainly it is
vey marginal. Try getting a 1N4148 to detect 1.8 dBm would be a feat.

Cleaning up the Carrier Oscillator, would clean up close in (around
the Filter frequencies). Since there would be less products/IMD
generated during the modulation process.

I dont think improving the product detector Oscillator level would
improve the Sensitivity as it is a very long way down the chain.
However I am sure it would improve/ minimise distortion. Some recent
tests (by ARRL and other on other transceivers with tones inside the
passband show significant AF distortion products) This should also
improve dynamic distortion, as well (real life as compared to test tones)

I found the major improvement in sensitivity I gained, was when I
reconfigured the 1st mixer. I mentioned some ideas in previous
postings I think

Kevin
ZL1UJG
| 911|911|2005-12-12 18:01:39|John P.|Re: Atlas210x--> Digest Number 343|
ZL1UJG wrote: "...I dont know why the dropped the LO level on RX. And certainly
it is very marginal. Try getting a 1N4148 to detect 1.8 dBm would be a feat."

Is this why you should replace the 'ring' diodes? Are the diodes doing
'nothing' below 0.7 volts, so you lose low level signals?

John

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| 912|912|2005-12-13 07:03:48|zl1ujg|Product detector diodes|
Hi

"Is this why you should replace the 'ring' diodes? Are the diodes doing
'nothing' below 0.7 volts, so you lose low level signals?"

Reply
It is a good reason to change the diodes to hot carrier like 1N5711
(quite cheap to buy).

The mixer diodes should be fully turned on during the on part of the
carrier osc (CO)cycle. Spend little time between the on and off
(transition)phase of the waveform. And then be off when the CO is in
antiphase (blocking the diode) With a low local oscillator level, then
the whole area is very grey.
It will spend more time during the transition phase and less time in
the on part. This will result in higher levels of distortion and
increased losses. You wouldnt loose low signals that much as the loss
of the mixer is overridden by the IF and RF gains.

The 350 XL uses germanium 1n270 diodes and higher level of carrier Osc
due to different designs

Kevin
ZL1UJG
| 913|912|2005-12-19 05:14:08|peter oesterle|another atlas mods site from PA0FRI|| 914|914|2005-12-19 18:15:27|John P.|Re: Atlas210x Mods listed|
Thanks for the Mods, Peter.

Happy Holidays and Merry Christmas to everyone on the Atlas list!
73's
John, K8DAD


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| 915|915|2005-12-24 15:51:14|Karolj Kormos|Merry Xmas|
To all subscribers, sincerely
Merry Xmas and Prosperous New Year 2006

YU7AE op.Kare

P.S.
Happy owner of 2 ATLAS350xl and one ATLAS210x

[Non-text portions of this message have been removed]
| 916|916|2006-01-02 22:38:33|atlas_nut|Atlas 210 Weak Receive|
Hi, I'm new to the group. Not sure if older 210 questions are welcome here but here
goes. After being inactive for 25 years or so I picked up an old 210 (not X) that works
(more or less). I've worked some DX with it and have noticed a
few problems. First off the S-meter never reads above S3. I'm able to receive OK on
it but I think there might be a problem either with S-meter or front end. I zeroed the
S-meter with the antenna disconeccted. It doesn't seem to matter which band I'm on.
Antenna is W2AU Balun 40M dipole with SWR of 2:1 (1:1 with MFJ tuner). All antenna
connections seem OK. Rig puts out around 90 watts and audio reports are fine. I've
cleaned the connections on the rotary band switch with an aresol cleaner which
helped greatly with switch operation.

Also noticed that rotary band switch it slightly loose behind faceplate causing switch
to move slightly when changing bands. This causes the little coils attached to the
switch to stretch when switching bands altering frequency slightly. Nut on faceplate
is tight. Anyone run into this problem. Thanks for any help.

Mark
| 917|10|2006-01-04 16:08:48|atlas210x-215x@yahoogroups.com|New file uploaded to atlas210x-215x |
Hello,

This email message is a notification to let you know that
a file has been uploaded to the Files area of the atlas210x-215x
group.

File : /210X LE Instructions addendum.pdf
Uploaded by : yv5grb <edresden@... Description : Atlas 210X LE Instructions Addendum

You can access this file at the URL:
http://groups.yahoo.com/group/atlas210x-215x/files/210X%20LE%20Instructions%20addendum.pdf

To learn more about file sharing for your group, please visit:
http://help.yahoo.com/help/us/groups/files

Regards,

yv5grb <edresden@...| 918|916|2006-01-04 16:24:12|yv5grb|Re: Atlas 210 Weak Receive|
Mark,

Welcome to the group, if you have a 210 this is your home...
I would suggest to check into the files area and look for the
calibration /adjusting procedure documents (this in relaton with your
S meter)...I have found that if you pick up an old equipment most of
the faults are due to soldering faults, pieces moved from original
site because of external intervention (like your rotary band switch
problem)... so you are welcome to explore your radio.

73 de Eduard


--- In atlas210x-215x@yahoogroups.com, "atlas_nut" welcome here but here
210 (not X) that works
able to receive OK on
front end. I zeroed the
which band I'm on.
tuner). All antenna
are fine. I've
cleaner which
faceplate causing switch
attached to the
slightly. Nut on faceplate
| 919|919|2006-01-04 18:01:29|John P.|Re: ATLAS Radio List Welcome|
Happy New Year Everyone!

Anybody with a 210, 210x, 215, 215x, (180, 350) etc...is more than welcome here
for ideas on how to make the most of our radios.



__________________________________________
Yahoo! DSL – Something to write home about.
Just $16.99/mo. or less.
dsl.yahoo.com
| 920|920|2006-01-15 17:54:43|georgette.murdock9810@wuuhrsdfs.com|This personals site is actually pretty damn good!|
Damn, it has sure been a while... I just realized today that it's been 18 months since I went out with a special lady last, but I'm pretty happy to be heading out tonight. I've had a bit of trouble finding ANY decent women lately so I joined up at this place a couple of weeks ago http://www.meetemhookup.info/cmpe . And so far been doing pretty well, just chatting to a few girls near me on Webcam and via the mail system on the place, but this is the first one I've lined up. So anyway, wish me luck guys!!
| 921|920|2006-01-15 18:00:35|tdilover|Re: This personals site is actually pretty damn good!|
--- In atlas210x-215x@yahoogroups.com, "georgette.murdock9810@w..."
pretty happy to be heading out tonight. I've had a bit of trouble
finding ANY decent women lately so I joined up at this place a couple
of weeks ago http://www.meetemhookup.info/cmpe . And so far been doing
pretty well, just chatting to a few girls near me on Webcam and via
the mail system on the place, but this is the first one I've lined up.
So anyway, wish me luck guys!!
You are a jerk, big time.
| 922|922|2006-01-16 19:57:55|John P.|Atlas Tuner?|
I saw an Atlas tuner on eBay - is this essentially an Atlas 210 tuner in a box
without the transmitter boards, or what does it look like electronically?



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| 923|923|2006-01-20 17:45:12|kendra-mackey426@hogwasheed.com|Met my perfect match finally...|
Thought i would share something with ya'll. Great fun and it does actually work. Met my girl on here, http://www.onlinebarandchatroom.info/zjhl and so far it's been the best year of my life ever! Wish you all the same happiness.
| 924|920|2006-01-20 19:31:35|Ian|Group Moderator?|
These are automatic posts & automatic registrations - any chance of
tightening up the moderation of the group? This group has good Atlas
info. - it would be a shame to have it destroyed by spam.

Many thanks & 73,
Ian G4FSU
| 925|925|2006-01-21 14:17:09|kendra-mackey426@hogwasheed.com|This personals site is actually pretty good!|
Met my fiance here! hehe. Thought I should share it with any other guys who are worried about ending up alone like I was. Check it out http://www.successwithchicks.info/aifh
| 926|926|2006-01-21 22:42:03|Comcast|Atlas Dial|
My 210's dial is stuck on the shaft. I think it may have been glued on by
the previous owner. Can anyone verify that there should be a brass cuff
around the hub of the dial where the allen screw goes? I think this may
have been added before I got it. The plastic around the set screw has
broken so the threads for the screw are gone but the dial holds fast. I'd
like to be able to remove the dial so I can work on the pc card under the
dail. I'm afraid I'll have to use a small puller to get it off the shaft
but it might really damage the present dial.
Then I'll probably have to repair it with epoxy or just use rtv to hold it
in place. Any spare dial drums floating around?

Thanks,
Mark
kb9kt
| 927|926|2006-01-22 11:30:54|roy|Re: Atlas Dial|
--- In atlas210x-215x@yahoogroups.com, Comcast glued on by
cuff
this may
has
fast. I'd
under the
shaft
hold it
replacement dial with no luck so good luck with your quest.I know its
a pain to keep the dial in place when the set screw cracks.
73's Mark and good luck
roy, aa5fs
| 928|928|2006-01-22 16:34:19|kendra-mackey426@hogwasheed.com|Hooking up with with women online is awsome!|
Thought i would share something with ya'll. Great fun and it does actually work. Met my girl on here, http://www.meetheretoday.info/nmxw and so far it's been the best year of my life ever! Wish you all the same happiness.
| 929|923|2006-01-23 16:49:27|kendra-mackey426@hogwasheed.com|Met my perfect match finally...|
Thought i would share something with ya'll. Great fun and it does actually work. Met my girl on here, http://www.freebeerishere.info/nluu and so far it's been the best year of my life ever! Wish you all the same happiness.
| 930|930|2006-01-23 20:15:33|John P.|Why all the spamage all the sudden?|
To me, the "perfect match" is a 1:1 SWR with an Atlas 210, not the spam crap
we've been getting on the list lately!
Don't you have to be a list member to post here?


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| 931|931|2006-01-24 16:57:17|kendra-mackey426@hogwasheed.com|Looking for love?Here's my tip for ya...|
Just thought I should pass on my knowledge to all you guys (and gals) on here. I know just like heaps of other men I am pretty shy when it comes to going up to someone. I've tried a few different places (clubs, bars, etc) but never seem to have too much luck. Anyway, a few weeks ago I joined up to http://www.matchsearching.info/xgtb and I have to say I am already getting excited. I was beginning to think I'd end up being alone for ever, but already been talking to a few interested ladies on there. Anyway, if you're like me it comes highly recommended!
| 932|932|2006-02-02 04:29:42|PEB JAG|Re: Atlas210x--> Digest Number 357|
Hate the spam! There must be an electronic workaround that lets it through. (sigh)
Anybody know how to shut off the spam or filter it?

The 401C is a great mic for the Atlas 210x... is anybody successfully using any other models that work just as well?

Tnx.



atlas210x-215x@yahoogroups.com wrote:
There is 1 message in this issue.

Topics in this digest:

1. Why all the spamage all the sudden?
From: "John P."


________________________________________________________________________
________________________________________________________________________

Message: 1
Date: Mon, 23 Jan 2006 10:08:47 -0800 (PST)
From: "John P."
Subject: Why all the spamage all the sudden?

To me, the "perfect match" is a 1:1 SWR with an Atlas 210, not the spam crap
we've been getting on the list lately!
Don't you have to be a list member to post here?


__________________________________________________
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Tired of spam? Yahoo! Mail has the best spam protection around
http://mail.yahoo.com


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Yahoo! Autos. Looking for a sweet ride? Get pricing, reviews, & more on new and used cars.

[Non-text portions of this message have been removed]
| 933|932|2006-02-03 23:05:44|Glen Farough|Re: Atlas210x--> Digest Number 357|
I used the stock mic of the yaesu FT-101 with a 210x...Easy to find
73 de Glen VE7LGF

PEB JAG <pebjag@... Hate the spam! There must be an electronic workaround that lets it through. (sigh)
Anybody know how to shut off the spam or filter it?

The 401C is a great mic for the Atlas 210x... is anybody successfully using any other models that work just as well?

Tnx.



atlas210x-215x@yahoogroups.com wrote:
There is 1 message in this issue.

Topics in this digest:

1. Why all the spamage all the sudden?
From: "John P."


________________________________________________________________________
________________________________________________________________________

Message: 1
Date: Mon, 23 Jan 2006 10:08:47 -0800 (PST)
From: "John P."
Subject: Why all the spamage all the sudden?

To me, the "perfect match" is a 1:1 SWR with an Atlas 210, not the spam crap
we've been getting on the list lately!
Don't you have to be a list member to post here?


__________________________________________________
Do You Yahoo!?
Tired of spam? Yahoo! Mail has the best spam protection around
http://mail.yahoo.com


________________________________________________________________________
________________________________________________________________________



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---------------------------------
Yahoo! Autos. Looking for a sweet ride? Get pricing, reviews, & more on new and used cars.

[Non-text portions of this message have been removed]



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| 934|934|2006-02-03 23:44:51|John P.|Atlas Microphones?|
The Shure 404C works great too.

Is there any benefit of using an older 'power mic' with the Atlas family rigs?

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| 935|935|2006-02-25 14:26:08|diva-bensley127@gamestoplayoncomputers.c|Looking for your perfect some1? Look no further|
Well I just got married! I can't believe it, just last year I was beginning to think i would never meet anyone. I'm 25 already and I thought it was all over. After some recommendations from a buddy I joined up here: http://www.letsgetitpumping.info/rsmb and after 4 weeks I was already meeting up with a beauty. Well, 14 months later and where still together and married =)
| 936|936|2006-03-02 13:32:28|Mark Hill|RCA 40446 / 40582 (Atlas-210x PA driver transistor)|
Folks,

This topic probably warrants an FAQ on here! Still the question is
not the usual, 'what modern device can I use as a substitute', so here goes.

I am looking for datasheet / data on the RCA 40446 / 40582
transistors. So far, searching on-line only, I have only found the
40582 listed as: NPN, 60V, 1.5A, 3.5W, 27MHz, TO-39. I guess it
needs someone with an RCA data book on the case.

As many on here will know, attempts to drop in an MRF475 (or
something that looks like it should work) as a substitute for the
original part have not been wildly successful. I did note however
from a previous mail that Jerry, W9PB has had some success
substituting an MRF262 for the RCA 40446 part, used in some
(pre-TPserial number?) Atlas models. How's it working out, Jerry?

What I have found is a source of several RCA 40322, which look
similar and could just be a substitute, but can't find any data on
this either! So my real question is: Would a 40322 do the job in an
Atlas? (So I guess I need data for that part too!)

I note the copy of the Atlas 180 handbook I have shows a TRW PT5766
on driver duty, so that's at least three different types that were
used over the years.

BTW, while searching on the 'net, I came across lots of surplus
semiconductor sites saying they had stock of the genuine RCA 40582
part, with one in Spain wanting about Euro 9,00.

Regards.

Mark.

*******************************************
Mark Hill - G4FPH
E-mail: g4fph@...
Current web pages at: www.g4fph.net
Old web pages at: www.qsl.net/g4fph
----------------------------------------------------------------------
Dipoles resonant on 1942 / 3720 / 7085 kHz
Three element wire beam coming soon on 14180 kHz!
----------------------------------------------------------------------
Remember - SIDE for HV safety:
S witch off
I solate
D ump
E arth
*******************************************
| 937|936|2006-03-02 16:51:30|Jerry Spears|Re: Atlas210x--> RCA 40446 / 40582 (Atlas-210x PA driver transistor)|
Hello Mark, Yes I had good luck, Iam not at home at present yet will email you the transistor I used. By memory it seems like a MRF262. It was not a mechanical fit and I had to remove some of the power board to mount the TO220. Will respond by Monday. 73 and good luck Jerry7

Mark Hill <g4fph@...
This topic probably warrants an FAQ on here! Still the question is
not the usual, 'what modern device can I use as a substitute', so here goes.

I am looking for datasheet / data on the RCA 40446 / 40582
transistors. So far, searching on-line only, I have only found the
40582 listed as: NPN, 60V, 1.5A, 3.5W, 27MHz, TO-39. I guess it
needs someone with an RCA data book on the case.

As many on here will know, attempts to drop in an MRF475 (or
something that looks like it should work) as a substitute for the
original part have not been wildly successful. I did note however
from a previous mail that Jerry, W9PB has had some success
substituting an MRF262 for the RCA 40446 part, used in some
(pre-TPserial number?) Atlas models. How's it working out, Jerry?

What I have found is a source of several RCA 40322, which look
similar and could just be a substitute, but can't find any data on
this either! So my real question is: Would a 40322 do the job in an
Atlas? (So I guess I need data for that part too!)

I note the copy of the Atlas 180 handbook I have shows a TRW PT5766
on driver duty, so that's at least three different types that were
used over the years.

BTW, while searching on the 'net, I came across lots of surplus
semiconductor sites saying they had stock of the genuine RCA 40582
part, with one in Spain wanting about Euro 9,00.

Regards.

Mark.

*******************************************
Mark Hill - G4FPH
E-mail: g4fph@...
Current web pages at: www.g4fph.net
Old web pages at: www.qsl.net/g4fph
----------------------------------------------------------------------
Dipoles resonant on 1942 / 3720 / 7085 kHz
Three element wire beam coming soon on 14180 kHz!
----------------------------------------------------------------------
Remember - SIDE for HV safety:
S witch off
I solate
D ump
E arth
*******************************************




---------------------------------
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---------------------------------





[Non-text portions of this message have been removed]
| 938|938|2006-03-02 19:38:47|Mark Hill|Re: Driver for Atlas 210X|
Rene,

Thanks for the mail.

The ECG 224 sounds interesting - I've not come across that one, but
will keep my eyes open. Perhaps all these transistors were used in
early AM CB radios or CATV? Herb obviously got a good deal on them
back in the 70s!

Regards.

Mark.

-----------------------------------------------------
At 15:25 02/03/2006, Rene Poitras wrote:
*******************************************
Mark Hill - G4FPH
E-mail: g4fph@...
Current web pages at: www.g4fph.net
Old web pages at: www.qsl.net/g4fph
----------------------------------------------------------------------
Dipoles resonant on 1942 / 3720 / 7085 kHz
Three element wire beam coming soon on 14180 kHz!
----------------------------------------------------------------------
Remember - SIDE for HV safety:
S witch off
I solate
D ump
E arth
*******************************************
| 939|10|2006-03-03 14:46:23|atlas210x-215x@yahoogroups.com|New file uploaded to atlas210x-215x |
Hello,

This email message is a notification to let you know that
a file has been uploaded to the Files area of the atlas210x-215x
group.

File : /RCA 40446_40582.ZIP
Uploaded by : erischpater <erischpater@... Description : Data Sheets for 40446 & 40582 transistors

You can access this file at the URL:
http://groups.yahoo.com/group/atlas210x-215x/files/RCA%2040446_40582.ZIP

To learn more about file sharing for your group, please visit:
http://help.yahoo.com/help/us/groups/files

Regards,

erischpater <erischpater@...| 940|940|2006-03-03 14:51:41|Rischpater, Evan|RCA Transistor Specs|
Hi all,

I went home last night and dug through the rubble in my basement and
came up with a 1974 RCA Power transistor data book that listed the 40446
and 40582. I scanned the 4 pages into a zipped JPEG file and put it in
the Files area. Hope it helps you out.

73,
Evan
AK2Y
| 941|941|2006-03-03 15:53:17|Mark Hill|Re: Atlas210x--> RCA Transistor Specs|
Evan,

Excellent - finally all is revealed about the device in the top
hat! I was hoping someone might have the data. I've stitched the
JPEGs you provided together and re-posted them as a consolidated PDF,
made with Adobe Acrobat V7.

Looking at the data, I'm surprised that substituting for this device
has proven that much of an issue in the past. Apart from the obvious
mechanical issue, the part looks pretty common or garden CB PA to me.

Does your data book have any words about the 40322? Don't go to any
trouble if it's a clear non-runner, which looking at the way the RCA
part numbers run, it could well be.

Regards.

Mark.

-----------------------------------------
At 12:51 03/03/2006, you wrote:
*******************************************
Mark Hill - G4FPH
E-mail: g4fph@...
Current web pages at: www.g4fph.net
Old web pages at: www.qsl.net/g4fph
----------------------------------------------------------------------
Dipoles resonant on 1942 / 3720 / 7085 kHz
Three element wire beam coming soon on 14180 kHz!
----------------------------------------------------------------------
Remember - SIDE for HV safety:
S witch off
I solate
D ump
E arth
*******************************************
| 942|942|2006-03-03 16:53:15|Rischpater, Evan|Re: Atlas210x--> Digest Number 363|
Hi Mark,

I'll take a look tonight and let you know. . . Also, If here are any
others anyone is interested, I'll be glad to take a look. You may have
to be a little patient though.

73,
Evan
AK2Y


-----Original Message-----
From: atlas210x-215x@yahoogroups.com
[mailto:atlas210x-215x@yahoogroups.com]
Sent: Friday, March 03, 2006 9:38 AM
To: atlas210x-215x@yahoogroups.com
Subject: Atlas210x--
There are 4 messages in this issue.

Topics in this digest:

1. Re: Driver for Atlas 210X
From: Mark Hill <g4fph@... 2. New file uploaded to atlas210x-215x
From: atlas210x-215x
3. RCA Transistor Specs
From: "Rischpater, Evan" <erischpater@... 4. Re: RCA Transistor Specs
From: Mark Hill <g4fph@...

________________________________________________________________________
________________________________________________________________________

Message: 1
Date: Thu, 02 Mar 2006 17:18:25 +0000
From: Mark Hill <g4fph@... Subject: Re: Driver for Atlas 210X

Rene,

Thanks for the mail.

The ECG 224 sounds interesting - I've not come across that one, but will
keep my eyes open. Perhaps all these transistors were used in early AM
CB radios or CATV? Herb obviously got a good deal on them back in the
70s!

Regards.

Mark.

-----------------------------------------------------
At 15:25 02/03/2006, Rene Poitras wrote:
*******************************************
Mark Hill - G4FPH
E-mail: g4fph@...
Current web pages at: www.g4fph.net
Old web pages at: www.qsl.net/g4fph
----------------------------------------------------------------------
Dipoles resonant on 1942 / 3720 / 7085 kHz Three element wire beam
coming soon on 14180 kHz!
----------------------------------------------------------------------
Remember - SIDE for HV safety:
S witch off
I solate
D ump
E arth
*******************************************




________________________________________________________________________
________________________________________________________________________

Message: 2
Date: 3 Mar 2006 12:46:08 -0000
From: atlas210x-215x
Subject: New file uploaded to atlas210x-215x


Hello,

This email message is a notification to let you know that a file has
been uploaded to the Files area of the atlas210x-215x group.

File : /RCA 40446_40582.ZIP
Uploaded by : erischpater <erischpater@... Description : Data Sheets for 40446 & 40582 transistors

You can access this file at the URL:
http://groups.yahoo.com/group/atlas210x-215x/files/RCA%2040446_40582.ZIP


To learn more about file sharing for your group, please visit:
http://help.yahoo.com/help/us/groups/files

Regards,

erischpater <erischpater@...







________________________________________________________________________
________________________________________________________________________

Message: 3
Date: Fri, 3 Mar 2006 07:51:27 -0500
From: "Rischpater, Evan" <erischpater@... Subject: RCA Transistor Specs

Hi all,

I went home last night and dug through the rubble in my basement and
came up with a 1974 RCA Power transistor data book that listed the 40446
and 40582. I scanned the 4 pages into a zipped JPEG file and put it in
the Files area. Hope it helps you out.

73,
Evan
AK2Y



________________________________________________________________________
________________________________________________________________________

Message: 4
Date: Fri, 03 Mar 2006 13:49:50 +0000
From: Mark Hill <g4fph@... Subject: Re: RCA Transistor Specs

Evan,

Excellent - finally all is revealed about the device in the top hat! I
was hoping someone might have the data. I've stitched the JPEGs you
provided together and re-posted them as a consolidated PDF, made with
Adobe Acrobat V7.

Looking at the data, I'm surprised that substituting for this device has
proven that much of an issue in the past. Apart from the obvious
mechanical issue, the part looks pretty common or garden CB PA to me.

Does your data book have any words about the 40322? Don't go to any
trouble if it's a clear non-runner, which looking at the way the RCA
part numbers run, it could well be.

Regards.

Mark.

-----------------------------------------
At 12:51 03/03/2006, you wrote:
*******************************************
Mark Hill - G4FPH
E-mail: g4fph@...
Current web pages at: www.g4fph.net
Old web pages at: www.qsl.net/g4fph
----------------------------------------------------------------------
Dipoles resonant on 1942 / 3720 / 7085 kHz Three element wire beam
coming soon on 14180 kHz!
----------------------------------------------------------------------
Remember - SIDE for HV safety:
S witch off
I solate
D ump
E arth
*******************************************




________________________________________________________________________
________________________________________________________________________



------------------------------------------------------------------------
Yahoo! Groups Links




------------------------------------------------------------------------
| 943|10|2006-03-04 16:37:31|atlas210x-215x@yahoogroups.com|New file uploaded to atlas210x-215x |
Hello,

This email message is a notification to let you know that
a file has been uploaded to the Files area of the atlas210x-215x
group.

File : /RCA 40322.zip
Uploaded by : erischpater <erischpater@... Description : Spec sheets for RCA 40322 transistor.

You can access this file at the URL:
http://groups.yahoo.com/group/atlas210x-215x/files/RCA%2040322.zip

To learn more about file sharing for your group, please visit:
http://help.yahoo.com/help/us/groups/files

Regards,

erischpater <erischpater@...| 944|941|2006-03-04 16:45:06|erischpater|Re: Atlas210x--> RCA Transistor Specs|
Mark,

I just put the Spec. sheets for the RCA 40322 transistor in the file
area. This time as zipped .BMP files. They compressed to a smaller
file. If you convert this to PDF, and the zipped files are not
needed, can I or someone delete the zipped files to free up room in
the file area?

73
Evan
AK2Y

| 945|941|2006-03-05 17:23:59|Mark Hill|Re: Atlas210x--> RCA Transistor Specs|
Evan,

Thanks for the data on the 40322. An altogether different animal and
wholly unsuitable as a substitute. You can delete the zip file as
far as I am concerned, plus the one you posted earlier as I the PDF I
posted now covers it.

Nice to see some activity on the group.

Regards.

Mark.

-----------------------------------------
At 14:43 04/03/2006, you wrote:
*******************************************
Mark Hill - G4FPH
E-mail: g4fph@...
Current web pages at: www.g4fph.net
Old web pages at: www.qsl.net/g4fph
----------------------------------------------------------------------
Dipoles resonant on 1942 / 3720 / 7085 kHz
Three element wire beam coming soon on 14180 kHz!
----------------------------------------------------------------------
Remember - SIDE for HV safety:
S witch off
I solate
D ump
E arth
*******************************************
| 946|946|2006-04-09 19:42:38|elmer131em|ATLAS 210 WITH NO OUTPUT, GREAT RECEIVER|
Hi, I replaced the output transistors, still no output but now when I
key the mic or put in cw mode to tune versa tuner the pa amps meter is
pinned. is there some adjustment that must be made when installing new
output transistors ? Would appreciate some help if someone can.
Otherwise off to the technician. Trying to save money as I am retired
on a fixed income. Thanks, Bill, KI4EWI
| 947|947|2006-04-10 09:33:56|irctlcplan05|Adding 1.8 MHz to 210|
I am trying to modify my Atlas 210 to operate on 1800, with the
modification of circuits used for 28 MHz. All components are specified
on the manual, except L918 tranformer on PC900C.
Does anybody know the type of core and the nr of windings?
Thanks in advance.
Michele IW2AAW
| 948|946|2006-04-10 14:15:30|Mark Hill|Re: Atlas210x--> ATLAS 210 WITH NO OUTPUT, GREAT RECEIVER|
Bill,

I suggest first you isolate the DC bias from the base of the PA
transistors (centre tap of the transformer) and investigate the PA
bias circuitry (Q506 and surrounding components). If the bias
circuit has a major problem, you might inadvertently destroy your new
devices if not careful. The Atlas PA transistor bias circuit is an
awful piece of design. Could be that the PA bias just needs
re-adjusting - the bias pot may well have enough range to cause the
PA transistors to draw 16 Amp DC if mis-adjusted.

As to the lack of output, that's another matter, but first things first!

If you don't feel confident in proceeding, then do get some help.

Regards.

Mark.

------------------------------------------
At 18:42 09/04/2006, you wrote:
*******************************************
Mark Hill - G4FPH
E-mail: g4fph@...
Current web pages at: www.g4fph.net
Old web pages at: www.qsl.net/g4fph
----------------------------------------------------------------------
Dipoles resonant on 1942 / 3720 / 7085 kHz
Three element wire beam coming soon on 14180 kHz!
----------------------------------------------------------------------
Remember - SIDE for HV safety:
S witch off
I solate
D ump
E arth
*******************************************
| 949|949|2006-04-12 15:22:09|on6ab|My 210X mods|
Hi all,

I posted a file called "ATLAS 210X modifications ON6AB" in the files
directory describing the mods I executed on my 210X.
Many thanks to PA0FRI who is the "brains" behind most of the mods.

73,

Bruno
ON6AB
| 950|950|2006-04-12 15:26:23|on6ab|210X manual|
I posted a new version of the 210X operation manual in the files
directory. (hi-res scanned drawings and OCR reworked text).

73,

Bruno
| 951|950|2006-04-12 15:31:07|on6ab|210X manual|
Oops, not enough free space on Yahoo for the manual...(3Mb)
Sorry.

73,

Bruno
| 952|952|2006-04-12 15:57:40|LW3ESC|Digital dial|
Hola, mi nombre es Marcelo, soy de La Plata, Argentina.
Tengo un HF Atlas 215x LE, y desearia saber si alguien tiene algun
esquiema de un display digital sencillo para colocar en mi equipo,
estuve mirando las fotografias y he observado que hay un equipo con un
lcd colocado. esa es la idea que tengo, colocar algo similar en lcd o
segmentos led
gracias
| 953|949|2006-04-12 20:44:20|irctlcplan05|My 210X mods|
Very good job, Bruno.Thanks a lot.
It was not easy for me to understand the original paper by PA0FRI.
On page 4 of your paper, I see on the picture of PC200 a coil on
white core that I cannot find on the board I have in my 210.
Is this your mod?
Best regards.
Michele IW2AAW





--- In atlas210x-215x@yahoogroups.com, "on6ab" files
| 954|952|2006-04-12 20:52:23|irctlcplan05|Digital dial|
Hola Marcelo,
Creo que sea mejor comprar un display digital en kit (mira el sitio
http://www.aade.com/Applic~1.htm#Atlas210).
Buen Trabajo!
Hasta luego
Michele IW2AAW


Marcelo
I think that the best soluition is to buy a kit for the Digital
display (see
http://www.aade.com/Applic~1.htm#Atlas210 ).
Best regards.
Michele IW2AAW



| 955|799|2006-04-13 21:36:23|zl1ujg|Mixer diodes|
Hi,
Just looked thru the mod notes, that were posted in the files section.
The recommendation is that BAT85's be used. I looked at a datasheet
for them and it indicates that with low reverse bias (-1V), the
capacitance is ~ 10 pF per diode. With 1N5711 schottky diodes the
capacitance is 1.2 pF @ 0V.

The BAT85 diodes dont appear to be recommended for mixer operation,
either.

Use of BAT85s in the mixers could possibly result in increased loss
at higher frequencies and also degraded mixer balance due to the
bypassing effect of the diode capacitance.

Just my 2c worth

Kevin
ZL1UJG
| 956|799|2006-04-14 09:35:02|irctlcplan05|Mixer diodes|
Kevin,
probably this is the reason why two serial BAT85 are recommended for
each branch of the mixer.
Regards.
Michele IW2AAW

| 957|799|2006-04-14 10:51:32|Bruno Beckers|Re: Atlas210x--> Mixer diodes|
Hi Kevin,

Many thanks for your comments. You're probably right, sounds logical.
I used BAT85's because I still had a few here and PA0FRI was using them too.
Next week I go of to the shop and buy me some 1N5711's.
If I may, i will rework my mod file and include your comment.

73,

Bruno



| 958|958|2006-04-14 22:44:46|John P.|What Mixer Diodes work best, or leave them alone?|
"zl1ujg" <zl1ujg@... section. The recommendation is that BAT85's be used....1N5711 schottky diodes
the capacitance is 1.2 pF @ 0V.

Hi,does anybody know what works best? Keep the original diodes, or use two
BAT85's (wired in series to cut the capacitance in half?) or IN5711 Schottkys?
Do you have to readjust anything after changing out the diodes? Let us know!

Happy Easter to all!

John K8DAD

__________________________________________________
Do You Yahoo!?
Tired of spam? Yahoo! Mail has the best spam protection around
http://mail.yahoo.com
| 959|799|2006-04-14 23:46:15|radio_wave2003|Re: Mixer diodes|
Hi Kevin

Well i think it depends on what's in the junkbox.
But you could use bat83 1.6pF close to the 1n5711.
And when you have to go to the store they are much easier to get in
Europe.

Mario

| 960|799|2006-04-15 00:54:56|zl1ujg|Mixer diodes|
Hi,
If your rig works well with the standard diodes, leave them alone.

However most commercial balanced mixers (DBM) use schottky diodes.
The ideal is to have only a small portion of the time spent in the
middle region between on and off. With normal 1N4148 diodes the region
is larger (Vd ~ 0.7v), hence schottkys are used.(0.3 to 0.4v)

If one has a high level of LO drive then mixers with 2 schottky
diodes in series are used. (+17 dBm)

However, from measurements the LO and Carrier drive on the 210X is
marginal (and swapped between mixers), so my personal choice would be
to have single schottky diodes in each leg.
Those in USA could use the 1N5711 (a good cost effective
choice)Agilent(?) makes them but are available from a number of sources.
I dont know about the BAT83 but a look at the datasheet shows it to be
a better choice than the '85.
I think I got 25 off 1N5711 from Farnell.
From memory I have 4 schottkys in both mixers.
I reengineered my mixers anyway, to be more standard wrt to
minicircuit type mixers. I wasnt happy with the original
configurations, and got significant improvements.
Terminations do affect the performance of DBMs and usually result in
less than ideal performance. (Ongoing work is needed)

Kevin
ZL1UJG
| 961|961|2006-04-16 21:13:41|elmer131em|Swan 100mx|
Hi, Does anyone have experience with the Swan 100mx and can compare it
with Atlas 210x ? Better, worse, same ? Thanks, Bill, KI4EWI
| 962|961|2006-04-16 22:17:24|zl1ujg|Swan 100mx|
Hi,
I just happen to have one of those as well.
In my opinion it is far better designed than the 210x.I would call it
a much earlier version of the Elecraft K2, but without the uP's and
digital parts.
There are a few things to note. The PA bias diode is not thermally
connected to the RF transistors and would need reworking. The IF chip
is an unusual device uA757 (?) and maybe unobtainable.
My unit is a high power oscillator. (The unit has probably had high
volts due to PSU failure) and someone has replaced the finals with 50
MHz devices which dont want to sit down. The drivers were leaky and I
replaced those, so it is a work in progress.
I dont know where the Swan 100mx fits in (year wise) but it looks as
though a different designer was resposible for it.
PS the calibrator was u/s and I replaced the logic chips, but will
have to add a regulator/ zener as the replacement IC's are now 5v. The
old parts are unobtainable.
The rest of the unit is pretty generic, in parts however. I think the
VFO is a variable L.
Single conversion of course. (8 pole filter as well).
A while back I acquired a Yaesu FT-7B and someone had replaced the old
6 pole with a KVG 10 pole. What a win!

Remember units of this age may have leaky caps ( mainly Electro and
even ceramic sometimes) and the switch contacts may need some de-Oxit.

If its the right price?

Kevin
ZL1UJG
| 963|963|2006-04-17 09:52:05|irctlcplan05|Surprise with Atlas 210|
When I closed the case of my 210 at 22.00 local time, after a lot of
mods and alignments, I found that everything was right, but only the 40
mb were affected by a big jam of broadcasting stations in clear, as
received with an AM demod, some in the backgroud and some quite strong,
WITH THE EXT OSC CONNECTOR removed (no jumper) and indipendent of the
tuning.The RF gain control had limited effect. The suspicion is a front
end overload.
The BC stations were in the segment just above the 7100 KHz limit and
were very strong when monitored with an other receiver. The antennas
used were T2FD, dipole for 40 m and long wire.
I never found this problem in the past, but I never used my Atlas late
in the evening. Is it normal?
Thanks for a world of solace...
Best regards.
Michele IW2AAW
| 964|964|2006-04-17 10:58:14|zl1ujg|40m Intermod and Crossmod|
Hi,
You mention that you have not used the 210 late before? So it is
possible that it has overload.
There are two basic versions of the RF input PCB.One with a noise
blanker and one without.
The basic unit "without the noiseblanker" would be slightly less
sensitive but have superior signal handling.
The unit with the noiseblanker has two versions (I think)in that the
last transistor near the crystal filter has bypassing, and sometimes
reduced bypassing.( Lots of IF preamp gain and slightly less)
It is possible that the levels on your antenna (especially on the 40m
band in Europe) are either going through the mixer and being amplified
causing crossmod, or the mixer itself is causing crossmod.
5.5 MHz is not to far from 7 MHz and so the LC filter rejection may
not be too great.( both RF and IF).
I found that the original configuration of the mixer wasnt too well
balanced and this may be causing feed through (even though no Local
oscillator is present, as you mention.)

You also mention that you have done some mods and alignment?
What did that involve? It may pay to check your work as you may have
disconnected a coax earth or created a dry solder joint, which may
cause similar symptoms.

Have you another RX, that you could try as an alternative, just in
case you have a RF detector in your antenna/ antenna switch/ ATU?

Kevin
ZL1UJG.

Mmmm. I wonder if it is possible that balancing the 1st mixer for best
carrier rejection on TX, actually unbalances the mixer for RX
purposes, due to different terminations on the ports and other issues?
| 965|965|2006-04-17 11:39:21|zl1ujg|White coil on 2nd mixer/ demod pcb|
Hi,
Me again.
Re an earlier posting about the white coil.
The white coil (and associated capacitor) on 2nd mixer/ demod pcb is a
parallel tuned circuit. This is to notch out the 5.52 MHz (or
equivalent IF frequency) This reduces the level of this frequency on
the output spectrum.
This is present on my 210x, but would have to look at the 210(no
suffix0 handbook, incase it was a later mod.

The level of the 5.520 IF on the output is dependent on the balance of
the 2nd mixer/ demodulator mixer. This is affected by its
configuration, terminations,diode balance,etc and the LC parallel
tuned circuit, in series with the output reduces the level further.

Thank goodness for antivirus software. Although my ISP filters out
viruses in emails, one got through about 30 mins ago and it got
stopped in its tracks.(The last virus seen was nearly 2 years ago)
Keep your antivirus software up to date!!

Kevin
ZL1UJG
| 966|966|2006-04-17 12:02:51|zl1ujg|Crossmod|
Hi,
I notice that the files section at this reflector, has a Noise blanker
file and the 5th jpg is text which mentions about crossmod due to the
settings of the noiseblanker, so have a look at that as well.

Kevin
ZL1UJG
| 967|966|2006-04-17 14:35:25|irctlcplan05|Crossmod ?|
Thanks a lot Kevin.
This morning the problem was not present, and therefore I guess that it
is caused by the very high level of signals here in Italy from 7100 to
7300; 5520 and 5523,3 are not used. My PC 100 has no noise blanker.
It was modified according to the paper by PA0FRI in Dutch. (8x BAT85
and 2 x 100 ohm resistors).
I modified the Carrier Osc board.
The balance was done according to Atlas specifications. Norm and
Opposite positions give different readings.Best balance in Norm.
If performed the Xtal filter roll off adj according to Atlas, in
Opposite the balance is impossible.
I noticed one funny symptom: the carrier osc board seems to be
microphonic, at a degree related to the carrier frequency itself (!!!).
Later on in the evening I will try again, replacing the PC100 with the
unmodified spare , comparing reception with my IC706 and checking wires
and connections. With a big cup of neapolitan coffee...
Best regards.
Michele IW2AAW


| 968|968|2006-04-18 07:23:02|zl1ujg|Re virus|
Please note the virus didnt come through the reflector.
My ISP is at xtra.co.nz

Kevin
ZL1UJG
| 969|966|2006-04-18 07:50:57|zl1ujg|Crossmod|
I have had instability problems with other crystal oscillators and
sometimes grounding the crystal helps.
The mods to the Carrier Oscillator. Are they the mods what I
suggested? If yes.
Sometimes high Z amplifiers go unstable. A small value resistor in the
collector circuit between the collector and the tuned circuit (100
ohms +/-) usually stops the oscillation.
Let me know so that changes to the documentation may be made.
If it is not my mods, then I suggest that one looks at supply
decoupling anyway.

Kevin
ZL1UJG
| 970|970|2006-04-18 08:50:07|zl1ujg|Funny carrier osc|
Hi,
I havent got my Atlas 210x to hand, however I wonder if the 1.4 uH
coil is unscreened. If it is an axial inductor, then the field
generated by that coil could be picking up/ radiating round the
carrier oscillator circuit causing instabilities.
In the original configuration this may hot have been an issue, due to
heavy loading of that circuit.
In most cases inductors in this type of circuit would be sheilded or
toroidal. I recommend that a small metal shield be placed over the coil.
Copper or tinplate would be suitable.

I havent seen an image of that PCB anywhere, but would be useful for
others

Kevin
ZL1UJG
| 971|971|2006-04-18 11:52:06|on6ab|Files directory free space|
Hi all,

If anybody want to add a file to the "files" directory and there's no
more free space available to do so, please give me a sign and I'll
remove my MODS document.

73,

Bruno
| 972|972|2006-04-20 11:35:53|zl1ujg|Notch filters|
I have just uploaded a file called Notch filters to the files section,
under ZL1UJG.

I would like someone, if possible to confirm what I found, either by
viewing the components physically or doing measurements.

Discussion please

Thanks

Kevin
ZL1UJG
| 973|972|2006-04-20 21:28:55|irctlcplan05|Notch filters|
PC200 Notch.
According to the manual, the parallel capacitor C221 should be a Mylar
one.
I will replace it with a Mica capacitor.

Carrier oscillator.
I do not think there is room enough to replace the axial inductor with
a tunable shielded coil. This is the the best solution as it would be
possible to fine tune the circuit. As an alternative, I will try to
find a small toroid.
Best regards.
Michele


| 974|974|2006-04-21 11:32:56|zl1ujg|More notes on notch filters|
Hi,
An amended PDF with some more measurements is in the files section,
under ZL1UJG

Kevin
ZL1UJG
| 975|974|2006-04-21 15:19:56|irctlcplan05|More notes on notch filters|
Surprise!
I opened my Atlas 210, I removed the PC200 PCB and...it has no notch
filter.On the Manual I was given with the RTX the schematic shows the
notch...may be a different version.
I will try to post the picture of my PC200.
Regards.
Michele IW2AAW




| 976|974|2006-04-21 15:50:09|Uwe Sievers|Re: Atlas210x--> More notes on notch filters|
irctlcplan05 wrote:

Hello,
in no one of the Atlas 210,215 or 180 had ever been a notch filter
installed.... if there is one then it,s a user modification...
I have owned all types of Atlas radios in no one was a notch filter....
so may be this is a very special version modified by someone...
best 73,s Uwe DJ9XG
| 977|974|2006-04-21 18:24:46|irctlcplan05|: Atlas210x--> More notes on notch filters|
Uwe
You are probably right, but the original schematic diagram on my Atlas
Manual shows a trap made by L205 and C221.
Serial Nr is TE2596.
Regards.
Michele
| 978|974|2006-04-21 18:38:20|Uwe Sievers|Re: : Atlas210x--> More notes on notch filters|
irctlcplan05 wrote:

Michele,
this trap is for reducing harmonics thru the mixer... I don,t know the
resonance frequency of it, but I remember in former discusions that
these traps (there are more in the transceiver) had been implemented in
a later phase by Atlas.... may be take a look into the files section
here for older documents.
73 Uwe DJ9XG
| 979|972|2006-04-21 21:18:10|zl1ujg|Notch filters|
Hi,
My 210X unit is a 5520 kHZ IF model and the s/n is TH3996.

The manual doesnt show the notch filter. But the manual at the ON6AB does.
I thought the 5520 MHZ kHz were earlier, but the Notch mods, appear to
have been established during that version.

I would think the later versions with the different IF would have the
mod done.

I note the posting on the other reflector, Uwe...

The notch frequency is for 5.52 MHz (look at the TX and RX filters,
at least the ones with the notches incorporated)

The white 0.6 uH coil appears to be the factory mod, as I have seen it
in a lot of pictures.

Kevin
| 980|980|2006-05-02 02:58:47|yv5grb|carrier on 28Mhz|
Dear Atlas fellows (and Hams),

I own two 210X and have keept them alive thanks to this forum. The
question this time is: One of the tranceivers show (in SSB)a carrier
signal ONLY in 28Mhz, where do i have to look at? (my board is PC-
120B) any idea? the rest of the radio seems to work great...and is
totally original.

73 de Eduard (YV5GRB)
| 981|980|2006-05-02 15:18:21|on6ab|Re: carrier on 28Mhz|
Hi Eduard,

Did you try adjusting the carrier balance pot R101 on PC100/120?
If that doesn't help I should suspect bad diodes in the first balanced
mixer on PC100/120(D101 to D104 - 1N4148). Excessive capacitance will
create unbalance (leakage) which is best noticed on the highest
frequencies (10m).
Maybe it's a good idea to swap them anyway with BAT83 Schottky types.

73,

Bruno
ON6AB

| 982|982|2006-05-02 16:06:53|Russell H Kinner|Russell H Kinner/NorthAmerica/RA/Rockwell is out of the office.|
I will be out of the office starting 04/30/2006 and will not return until
05/07/2006.

I may have brief access to e-mail but will not be able reply without a
delay of 1 to several days. I will respond to your message when I return.
| 983|980|2006-05-02 16:41:29|yv5grb|Re: carrier on 28Mhz|
Dear Om Bruno,

First I want to thank you for your reply.
Also I want to thank you for your nice web page with all the info
about Atlas 210X and 215X, that I have been consulting from time to
time, you are one of the responsables for all the "Atlas gear
collectors", so I want to double thank you.
Yesterday, I punched some power fom the 28 Mhz as I was getting only
5W output... I did so working on the PC900 board, but noticed this
steady carrier ONLY on 28MHz. (I was unable to notice it
before...maybe because the low output).

So I try the PC120B, it is exactly the same board as in the picture
on your web page. So I was working with the upper right potenciometer
(I beleave it is the R101 pot)but no difference was noticed.

You suggest to change the mixer diodes (in a rectifier scheme)on this
board (located in middle on extreme right side), I've been reading a
lot of discussion abt this, also on the PC200 board. Yesterday I was
reading an article of some OM in Nederland (PA) that use two in
series each (4 old 1N4148 replaced by 8 new BAT83) is this even
better?. Is it reccomended for the PC200 too?.

By the way I have seen a lot of confussion regadles to schematics and
pc# boards (people claim schematics are wrong) but they must notice
the letter that follow the board number PCXXX (A, B, C or D). Maybe a
collection of these can be added on this Forum or on your Web page.

Again Bruno thanks for your constructive work for Ham radio and some
Boatanchors.

73 de Eduard
--- In atlas210x-215x@yahoogroups.com, "on6ab" balanced
will
types.
The
carrier
is
| 984|984|2006-05-03 10:32:52|zl1ujg|Carrier on 28 MHz|
Hi,
Your comment about changing both quads of mixer diodes is correct.
I would think the rejection of a set of schottky diodes, would be
better than 1N4148 diodes. I note some drawings say 1N270's which are
geranium (errrr... germanium)

Another point is that there is substantial gain, after the crystal
filter, due to the high gain in the IC(MC1350)and this could possibly
give a false 28 MHz power reading.

It is therefore important that the carrier balance is correctly done,
as bad carrier balance could result in significant bleedthrough.

Also the 28 MHz filter, has less rejection than the other filters,due
its higher frequency.

I measured ~ 43 db rejection at the TX image (16.96 MHz or 28 MHz -
11.04). It is assumed that the filter has about 15 - 25 dB rejection
at the LO frequency. It could be less or more?

There is an additional possibility that the unit is oscillating in the
28 MHz band.

It is possibly bad rejection in the TX mixer/product detector,
possibly due to a faulty diode.

From my other measurements, the mixers has less than ideal balance,
due to their configuration. Look at the www.minicircuits.com website
for further info.

Kevin
ZL1UJG
| 985|985|2006-05-03 19:21:37|John P.|Atlas 215 / Atlas 210 / Atlas210x-215x Microphone?|
Hi all,
Question for the group: what microphone works best with these wonderful Atlas
210/215 rigs? I am currently using the original mike, but get reports that my
signal is 'light'.
Is there any benefit to add a 'power mic' to get some more audio gain and
modulation punch? How high can you crank the Mic Gain before it flat tops?
I'd appreciate any suggestions in the audio department, as I cannot get my
sloper antenna any higher, so all I can do is try to maximize my modulation.
Thanks, and 73's
John


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| 986|985|2006-05-03 20:22:53|Kenth Fäger|Re: Atlas210x--> Atlas 215 / Atlas 210 / Atlas210x-215x Microphone?|
Hello John
I'm use an old Turner +3 handheld microphone and the sound from it is very
very good.
SM6MFA/Kenth

2006/5/3, John P. <toledohamradio@... [Non-text portions of this message have been removed]
| 987|985|2006-05-03 23:00:10|Bruno Beckers|Re: Atlas210x--> Atlas 215 / Atlas 210 / Atlas210x-215x Microphone?|
Hello John,

If you have the PC120 board (noise blanker version) in your Atlas, PA0FRI
has a modification that might be interesting to try for you. In order to
increase the audio punch, he installed two diodes 1N4148 in antiparallel
over L122 on PC120 creating an RF clipper this way. He states it gives you a
1 s-point talk power increase. Seems not to work on a PC100 board though.
Myself I'm using a very old Bell ITT microphone which gives me plenty of
punch. I also hooked up my Heil BM10 on the Atlas which is even better
(crisper).

73,

Bruno


| 988|980|2006-05-03 23:17:16|on6ab|Re: carrier on 28Mhz|
--- In atlas210x-215x@yahoogroups.com, "yv5grb" Kevin is right about the Schottky diodes. A few message ago he also
explained why and when to use 2 Schottkys in series.
PA0FRI in his article advises to use BAT85 diodes which are not the
ideal choise according to Kevin and again he is right. They have a
10pf capacitance which is quite high. The BAT83 types only have 1pf.
I tried the PA0FRI mod with 8x BAT85 both on PC100 and PC200. I then
changed the 8x BAT85's into 4x BAT83's on PC100 and refitted 1N4148's
in PC200. I feel the 4 BAT83's on PC100 are an improvement. I did not
notice any difference between the 8x BAT85 vs the 4x 1N4148 on PC200.

73,

Bruno

| 989|989|2006-05-04 12:10:50|pifno|Wobbling audio on LSB|
HI
A few weeks ago I wanted to fire up my old 210x.
I found that the audio was kind of "wobbly".. (rapid tremolo effect)
This appeared on all bands, but only on LSB.
The LSB/USB-switch have been a bit dodgy but i have used some
electronic cleaner and now the switch seem fine.
Are there others with the same problem, and can it be fixed ??

73 de LA7CEA
| 990|990|2006-05-04 14:55:42|earlinclayton|warbling audio atlas 210x|
When I first bought my 210x; it had instability on transmit.
I adjusted the carrier or balance pot of the balanced modulator (cant
remember exactly) but it is in the low level transmit stages. That
seemed to fix the problem and my 210 has been stellar ever since.
I would also clean the contacts..ie ground and plug in circuit board at
the same time. I have heard oxidation can be a problem with the 210.
I have the digital display and the outboard crystal unit with my rig.
Im planning to put it in my truck and use it mobile..perhaps this Field
Day. I have a web page with some technical,qrp and an interesting no
radials vertical based on the Cushcraft R7 Vertical antenna. My web
site is http://www.earlandrews.com 73 Earl VE3AB
| 991|980|2006-05-04 15:04:54|yv5grb|Re: carrier on 28Mhz|
Dear Bruno and kevin,

Thanks for your interest.

Well, in the local area (Caracas) I could not find except the
original 1N4148 (original part #)so I bought a bunch and changed
those 4 you suggested.
The problem is still there, seems not to have any problem on other
bands except on 28Mhz. So, there must be another fault,I have no idea
whatsoever.

I have another board, a 120C, that run the problem (carrier signal)on
all bands, I will change the diodes on that one and mount it and see
what happens.

73 de Eduard
--- In atlas210x-215x@yahoogroups.com, "on6ab" 1N4148's
not
PC200.
to
only
this
picture
potenciometer
this
reading a
was
and
notice
Maybe a
page.
some
capacitance
wrote:
forum.
is PC-
great...and
| 992|989|2006-05-04 15:24:31|yv5grb|Re: Wobbling audio on LSB|
Hello,

When I got my first Atlas 210X I found the same problem in the
receiving audio, to be honest I cannot remember if it was in LSB or
USB, but after checking the AF module (PB-300# on the extreme left)next
to the speaker. I found that there was a variable capacitor that was
almost destroyed, I think that the previous owner took the board off
and when he reinserted it in, the variable capacitor 'impacted' the
speaker magnet, as they are very close (really close...take care!). I
had to replace this part and the audio came back clear. This was just
my experience, just check it out.

73 de Eduard

| 993|815|2006-05-04 15:40:03|yv5grb|Re: Was low power now ocillates|
Hi,

I was checking old messeges, and found this one.

Did you solve the problem?... how? (I have somethig similar)

73 de Eduard

--- In atlas210x-215x@yahoogroups.com, "Chuck" preamp
pressed
another
don't
want to
| 994|970|2006-05-04 18:06:17|irctlcplan05|Atls 210/215 Balanced mixers|
As regards the correct diodes to be used in the two balanced mixers, I
see that the final solution is to use 4 x BAT83, instead of 4 x 1N4148
or 8 x BAT 85.
I replaced on my PC100/PC200 (with the mods suggested by PA0FRI and
the carrier oscillator mod by ZL1UJG) the original diodes with 4 x HP
5082-2835 and then with 8 x BAT 85.
Without specific instruments, it is difficult to compare the
performances of the different solutions.
I would go back to the 4 x HP 5082-2835 , mainly for the reason that I
cannot find here in Italy somebody selling BAT 83.
Best regards.
Michele IW2AAW
| 995|995|2006-05-06 06:58:58|zl1ujg|Diode clipper and wobbly carrier osc|
I think Yahoo had a problem in the last day or so and emails have not
appeared on some (?) reflectors. I thought I had sent the emails to
other recipients, so apologies for any confusion.

Anyway I will rewrite this email.
The wobbly oscillator is probably due to a high resistance contact on
the switch. This would possibly make the normally High Q crystal
appear as a Low Q resonator... hence wobbly. Solution:- Use the switch
more frequently. You could also use Caig DeOxit, which is product many
professional organisations use. The product name explains its function.

Diode clipper...
This would work on transmit, however it would probably change
impedance during clipping action and probably affect the response of
the filter...
I dont know where the PA0FRI component references are from, as they
dont appear to coincide with 210X/215X.

Another problem, probably more major, is that the diode clipper is
still across the circuit during RX and would cause severe IMD
(InterModulation Distortion). This is (unfortunately) enhanced by the
IF preamplifier gain and also the impedance step up at the crystal
filter. This would probably be worst on 40m due to adjacent BC stations

A possible solution to the RX problem is not have the diodes across
the inductor, but have the cold side (of the diodes) going to
capacitor (10nF), which then feeds a switching transistor (2n2222) OR
fet (2n7000) which has the Collector/Drain to the 10 nF. The Emitter/
Source to ground. The Base/Gate is then fed via a 10 k ohm resistor.
The other end of the 10k is from the TX +12, (only activated on Tx).
This would disconnect the clipper during RX

Comments please.

Kevin
ZL1UJG
| 996|996|2006-05-07 12:56:23|irctlcplan05|Carrier null Adj|
Dear Colleagues.
I have performed the Carrier Null Adj on my 210 according to the
procedure written by Atlas in their Service Bulletins.
In NORM position I have a minimum of 200 mV PP, but in OPP I cannot go
below 1 V PP,
Is this normal?
I have replaced the diodes with 4 x 5082-2800. No change.
Thanks in advance.
Michele IW2AAW
| 997|996|2006-05-08 11:54:31|zl1ujg|Carrier null Adj|
Hi,

Can you confirm that the oscillator is on the correct frequency?
Usually the crystals are set, 20 or 30 dB down the slope so that the
passbands would be 300 to 3000 Hz (+/-).
It is possible that a component has caused a problem or the crystal
has aged.
A frequency counter would be useful to verify correct operation.

There are two other possibilities

1/ The level of the carrier oscillator may change with different sideband.

2/ The slope of the crystal filter may change (on the opposite
sideband) giving different rejection.

Unfortunately my configuration is slightly different.

Kevin
ZL1UJG
| 998|998|2006-05-08 13:16:56|iw3arv|Atlas 210B, Rf Gain|
Hello, I present myself.

I'm paolo Iw3arv from Italy and I've just bought an Atlas 210 with
console. The rig is partially working and I need some advice from
person that have more experince than me. For now its my intention to
repair the receiving section because I'm really impatient to use the rig.

First question, my Atlas is marked Atlas 210 but inside the case I've
discovered a label marked Atlas 210B. Is it a versione between Atlas
180 and Atlas 210x?

Second question, the console CS220 is rated to 110 volt, anyone has
converted it to work with 220 volts?

I've powered the Atlas, the RF Gain control is not working and the rig
seems to have a very low sensitivity. The Smeter does not move. In the
80 and 40 meters band I'm able to receive some trasmissions, this
weekend I'received a lot of radio amateurs from europe. The 20, 21, 28
band are nearly silent. It seems that the rf gain is in fully
attenuated positition. Have you any suggestion, first I've the
intention to ceck the rfGain pot.

Tnx de iw3arv Paolo Italy
| 999|998|2006-05-08 17:01:21|on6ab|Re: Atlas 210B, Rf Gain|
--- In atlas210x-215x@yahoogroups.com, "iw3arv"
Concerning the 210B mark, this is an indication of the print version.
It is not a distinction between the 180 and 210 models. The older
PCB's have no "B". On the other hand, not every PCB in the Atlas has
had a "B" version and I believe some even have a "C" version. Not
really something to worry about at first instance.

Regarding the RF gain:
In contrast to "normal" HF radios, the S-meter of the ATLAS 210X does
not go to the right corner when the RF gain is turned down, so be
aware of that.
The RF gain circuit itself is a very simple voltage divider biasing
the base of transistor Q101, so I don't expect to be anything wrong
with that.
As you say you receive stations on 80 and 40 , let us suppose all
oscillator signals to the mixers are ok.
More likely the first IF amplifier (as you know, the Atlas has no RF
amplifier) has gone to the dogs. That's Q101 on PC100 - 2N3866.
You might try taking it out and connect the base track of this
transistor to the collector track on the PCB with a 0.1 microfarad or
so and see what's happening. If your reception is the same or
better,the transistor was not amplifying = If reception is worse, the transistor MIGHT be OK.
Of course, checking the T/R relay contacts is also a good idea to
start with...

good luck,

Bruno




the rig.
| 1000|996|2006-05-08 20:05:34|irctlcplan05|Carrier null Adj|
Thanks Kevin.
The frequecies of the Carrier Osc are set to the nominal values,
i.e.5520.0 and 5523.3.
I will check the level of the carrier, as you suggest.
Best regards.
Michele IW2AAW


| 1001|998|2006-05-08 20:23:23|irctlcplan05|Atlas 210B, Rf Gain|
Welcome Paolo!
Michele IW2AAW
| 1002|996|2006-05-08 21:15:58|Uwe Sievers|Re: Atlas210x--> Carrier null Adj|
irctlcplan05 wrote:

MIchele,
it,s not unusual that you have different carrier suppression in the
balance modulator... the reason is that you can only optimize one
frequency.. in the Atlas transceivers you use always the same carrier
crystal for all bands... only if you switch to the opposite sideband you
have to readjust the balance modulator... or a s a compromise use the
midpoint between both frequencies..
73 Uwe DJ9XG
| 1003|998|2006-05-08 21:23:23|iw3arv|Re: Atlas 210B, Rf Gain|
Hello Michele,
nice to meeet an italian here.

73 Paolo

--- In atlas210x-215x@yahoogroups.com, "irctlcplan05"
| 1004|998|2006-05-08 21:26:17|iw3arv|Re: Atlas 210B, Rf Gain|
Hello Bruno,

Thanks for the suggeestion, as soon I have time I'll try to investigate.

Paolo


| 1005|998|2006-05-09 09:44:46|irctlcplan05|Atlas 210B, Rf Gain|
Paolo,
when you have solved the problem with your Atlas we can try a QSO.
Good luck.
Michele IW2AAW
| 1006|996|2006-05-09 09:59:58|irctlcplan05|Atlas210x--> Carrier null Adj|
Uwe,
your message comforts me, even if I suspect there is something wrong
in my 210 with one side of the Xtal filter response, or with the
carrier position.
Best regards and thanks.
Michele IW2AAW


the
carrier
sideband you
the
| 1007|1007|2006-05-16 10:57:01|Thomas Stingl|Microphone problem with Atlas350 XL|
Hello,

my Atlas350XL came with a small dynamic japanese handheld mike "Primo"
which works fine, but an old dynamic "Leson" desk mike produces a signal
output at PTT, even when not speaking. Is there an easy cure for this,
I guess this is an impedance problem? For a test I removed the little
impedance trafo in the Leson, then the behavior is OK but the signal
is much too weak ...

Thanks in advance for any hints,
Thomas dl5sbs in Karlsruhe, Germany
| 1008|1007|2006-05-16 13:02:21|Bruno Beckers|Re: Atlas210x--> Microphone problem with Atlas350 XL|
Thomas,

Are you shure there was nobody else in the room??

| 1009|1007|2006-05-16 14:03:34|Thomas Stingl|Re: Atlas210x--> Microphone problem with Atlas350 XL|
On Tue, May 16, 2006 at 12:52:42PM +0200, Bruno Beckers wrote:
Except my Alter Ego there is no one else here .. no change when this
desk mike is covered, it is a constant output producing a few watts in
the end, like a carrier.
| 1010|1007|2006-05-16 15:46:36|Bruno Beckers|Re: Atlas210x--> Microphone problem with Atlas350 XL|
Thomas,

Have you been able to actually hear (with another receiver) what the
mic is producing? I mean is it a carrier, 50Hz hum or background
noise?
I suppose you have no compressor or clipper in the circuit?

br,

Bruno


| 1011|1007|2006-05-16 16:01:43|on6ab|Re: Atlas210x--> Microphone problem with Atlas350 XL|
Some other thoughts:

- Try connecting the "cold" connection of the primary winding of the
mic transformer to the "cold" side of the secundary.
- Some mic transformers have a separate terminal for the shield. Is
that the case with your Leson? Have you tried connecting this shield
to the transceiver ground?

br,

Bruno

--- In atlas210x-215x@yahoogroups.com, "Bruno Beckers"
| 1012|1012|2006-05-16 19:24:35|John P.|Re: microphone on Atlas 210X radio|
Interesting Microphone problem.
Is the switch totally separate wiring from the microphone element? Some desk
mikes put a short across the audio input when the push to talk is released.
Let us know your wiring situation.
73s
John

__________________________________________________
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| 1013|1007|2006-05-17 02:44:12|Thomas Stingl|Re: Atlas210x--> Microphone problem with Atlas350 XL|
Bruno wrote:

Yes, I tried that but it sounds similar when using the small mike
which does not provide visible power output without speech. Desk mike
produces just a stronger signal, sounds like mix of carrier and 50 Hz.

Nothing of this.

Nope, no separate trafo terminal for shield. It appears the transformator
is not original.

Here cold means connected to TRX ground?
The connections from trafo to microphone capsule appear symmetrical.


John wrote:

OK, this explains the double switch in the desk mike, else the wiring is
exactly the same as with the "good" hand held mike.


After some further experimenting I found that the "speechless" signal
appears only if I touch the desk mike metal body with my hand, which I
obviously always did in the past. Now when pushing only the plastic PTT
button the behavior is like the hand held mike, i.e. no speechless visible
signal output.

Seems like a trivial issue now, mike signal lead gets some connection to
ground via operator's hand/body.
I have not yet understood why the desk mike metal body is grounded with
the mike signal wire (ring wire / shielded mic lead), which is not the
same ground as the TRX body, I am still missing something here.

Another minor problem is that this desk mike produces less power output
than the hand mike, at same Mic gain position. This is probably a common
issue, I will search the archives how to adapt this.

But main question is answered, best thanks so far for the hints,
Thomas
| 1014|1014|2006-05-19 18:04:55|kb2izm|atlas 180 mic|
Does anybody know where I might pick uip a mic for my atla 180


73's kb2izm
joe paul
| 1015|1015|2006-05-21 16:55:51|w4vol|Repair Service|
Is there a repair service for the Atlas transceivers? I have 2 210X's
and a 350XL and would like to have them restored.

Thanks!

73 de W4VOL
| 1016|1016|2006-05-21 18:07:02|RUDOLPH KING|Re: Atlas210x--> Repair Service|
Dear W4VOL:- re your enquiry try "Tactical & Commercial Equipment Sales Inc" in Miami Florida they do repairs to all makes of amateur and commercial transceivers, their e-mail address is TCESI@...TCESI@... Regards
Rudy King
| 1017|1015|2006-05-22 18:24:16|rickskione@aol.com|Re: Atlas210x--> Repair Service|
Let me know how you make out, I've got a 350 that could use some work.
73,
K3EYJ

-----Original Message-----
From: w4vol <w4vol@... To: atlas210x-215x@yahoogroups.com
Sent: Sun, 21 May 2006 14:55:38 -0000
Subject: Atlas210x--

Is there a repair service for the Atlas transceivers? I have 2 210X's
and a 350XL and would like to have them restored.

Thanks!

73 de W4VOL







Yahoo! Groups Links






[Non-text portions of this message have been removed]
| 1018|1018|2006-05-23 20:53:41|Karolj Kormos|ATLAS 350xl semi-BK|
Hi to all Atlas owners,
i have Atlas 210x and 350xl and need some info about modification of Atlas
350xl for semi-BK operation on CW, my 350 is a early model and have only
full-BK.

73s and Cul on band (cw or rtty)
YU7AE ( 4N150AE spec. call for 150yrs of birth of Nikola Tesla )
op Kare
| 1019|946|2006-06-10 17:19:33|n6dra|Re: ATLAS 210 WITH NO OUTPUT, GREAT RECEIVER|
--- In atlas210x-215x@yahoogroups.com, "elmer131em" is
new
Hi Bill:

You need to reset the bias- there is a pot (R515) in the PA housing.
The transistors are saturated and the meter is showing the Ic- Won't
take much time to destroy the transistors with that much current. You
should set the bias for about .75a in SSB with no drive.

' 73 Tim N6DRA
| 1020|946|2006-06-11 11:49:52|MIKE DURKIN|DD6|
Does any one have a working DD6 , just the plain jane DD6 .. not the B or C
... looking for some info.

KC7NOA

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| 1021|946|2006-06-16 00:53:40|elmer131em|ATLAS 210 WITH NO OUTPUT, GREAT RECEIVER|
Hi All, Thanks to Mark Hill and Tim, N6DRA. I am still trying to solve
no output. I get no reading om the meter on bias adjust, also, on my
working 210, also no reading om meter in ssb position at rest. I may
sound stupid, but do I need to key the mic with no mic gain and alc
counter clockwise. I tried that on the working radio but was afraid to
mess with the bias on a working radio. Appreciate some help. Thanks,
Bill, KI4EWI,73
| 1022|946|2006-06-16 14:51:26|yv5grb|Re: DD6|
Dear OM,

Look in the Files section of this Forum, there you will find a PDF
manual and schematics.

http://f1.grp.yahoofs.com/v1/QJ2SRI5gtrpckMG97zPYwFT4WWGEZbthYg0VF8lpG
7_E3DodaxV4PgQjAbSteORvTjDqjU8E787A_V-Cf5hfZIMEqx8/DD6Man.pdf

73 de Eduard (YV5GRB)


--- In atlas210x-215x@yahoogroups.com, "MIKE DURKIN" the B or C
it's FREE!
| 1023|946|2006-06-18 07:39:21|MIKE DURKIN|Re: Atlas210x--> Re: DD6|
yes it is .. and its the ame that one that i downloaded years ago ... im
looking for info on the pins that are not listed in the schematic ....


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| 1024|946|2006-06-19 11:09:01|Mark Hill|Re: Atlas210x--> ATLAS 210 WITH NO OUTPUT, GREAT RECEIVER|
Bill,

Yes, Bill - just key the TX, with no mic. gain - the position of the
ALC control will not influence the PA resting current at all.

I'm wondering if you have trouble with the 'T' line? This feeds
Volts to all in the PA compartment, except the collectors of the
final transistors. If, in transmit, you have no +13 Volt on this
line then you would have no power to the low level TX amp. stages and
no PA bias. I think the 'T' line eminates from the relay on the
PC100 board, so might be relay trouble. You could swap the PC100
cards between your radios, if the card versions are the same, should
there be a need.

If you have a second receiver (sounds like you have a second Atlas,
at least!) you could connect a short piece of insulated wire to its
aerial socket and drape it close to the (hinged down) PA compartment
on the faulty radio to see whether you can hear any output from the
low level stages and/or driver stage. Don't physically connect the
wire to anything in the PA, just drape it nearby - say, a couple of
inches away. An oscilloscope would of course help a lot here, but
only if you know how to drive one.

You could check that the collectors of the PA transistors themselves
have +13 on them at all times and you could even try a low value (few
Ohm) resistor from each of the PA transistor collectors in turn to
ground just to check that the +13 Volt feed is capable of supplying
some real current and that the current metering is actually working -
there's not much to go wrong though.

I'm afraid the design of the PA bias circuitry in the Atlas mobiles
is very poor (same as many a solid state PA of this
generation!) It's not unknown for the current meter barely show any
resting current on a cold radio and for the resting current to climb
to a few amps on a hot radio.

It (almost) goes without saying Bill, that if you feel like your
getting out of your depth, there are some on this line that know of
suitable US-based repair shops. Might be one near you, somewhere.

Best of luck.

Regards.

Mark.

-----------------------------------------
At 23:53 15/06/2006, you wrote:

----------

*******************************************
Mark Hill - G4FPH
E-mail: g4fph@...
Current web pages at: www.g4fph.net
Old web pages at: www.qsl.net/g4fph
----------------------------------------------------------------------
Dipoles resonant on 1942 / 3720 / 7085 kHz
Three element wire beam coming soon on 14180 kHz!
----------------------------------------------------------------------
Remember - SIDE for HV safety:
S witch off
I solate
D ump
E arth
*******************************************

[Non-text portions of this message have been removed]
| 1025|1025|2006-06-26 09:08:06|iw3arv|No output|
Hello,

I'm here again with my nearly repaiered Atlas.
I'm solved some problem as:

RF Gain not working due to a burned PCB track
Smeter non working due to bad contacts.

Now I'm trying to correct the problem of low sensitivity on all bands.
On 80 and 40 I hear some stations, the other band are nearly silent.
I've the intention to check q101, but I,ve not done yet.

Last day I've tried to transmit simply moving the switch to trans with
non cw key or microphone plugged in.

My swr meter indicates near the same reflected and direct power on a
dummy load. The power was about 3 watt.

Anyone have suggestion!!

Thanks DE Iw3arv Paolo
| 1026|1026|2006-06-26 09:20:54|Jim|Re: Atlas210x--> No output|
Paolo, be aware that small variations in the carrier frequency will affect the drive. It's difficult to align the tx without some test gear, a receiver at the very least.
Cheers
Jim
VK4BBG

| 1027|1025|2006-06-26 16:54:41|MIKE DURKIN|Re: Atlas210x--> No output|
on thte first mixer board, the top mpost tuening can there is a cap along
the edge of the board.... replace it... its probably gone bad... or retune
same can ...


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| 1028|1028|2006-06-28 00:06:05|K2SSE|30 METER CONVERSION|
Hi
Has anyone put their 210x on 30 meters and if so with what success?

Thanks
Al
| 1029|1029|2006-07-03 12:23:39|oh7ka|WTB: Knob to the function switch for Atlas 210x|
Hi,

would anyone like to sell me an original knob for the Function (OFF-CAL-
REC-TRANS-CW) swithc of a Atlas 210x?

I bought recently a 210x, which seems otherwise ok but the original
knob has been replaced with a rather ugly knob.

Also, any information on source where suitable knobs would be available
or the type/manufacturer of the knob would be appreciated!

73 de Ari OH7KA / OH3KAV

email: akosone at luukku.com
| 1030|1030|2006-07-05 21:34:14|kb7rwa|mic.|
Hi , I am a disabled ham who had some brain damage in the past.

I got a 210x because it is simple to operate, but the mic is a cb
hand mic and the connector on the radio is a kenwood 4 pin one. The
radio works good but on x-mit if I whistle loud on a dummy load it
gets 100 watts or so but just normal talking just gives around 10
watts.
Should I just put a power mic on this rig ? that is what I thought of
trying. or is there some pot or something I can turn up ?


TNX kb7rwa daryl
| 1031|1030|2006-07-06 00:25:37|Mark Hill|Re: Atlas210x--> mic.|
Daryl,

Your problem is most likely that the CB mic. you have is a low
impedance unit, whereas the Atlas was designed for a high impedance
one. There are some mods for the Atlas to add a little more gain
round the mic. amp. thus making it suitable for low impedance mics.
however, to save opening the radio up (there is no other mic. gain
control apart from the one on the front panel) your suggestion of
using a power mic. should work OK.

The Astatic 'tear drop' power mic that I have in the shack has a huge
amount of amplification so, if you have one similar, make sure that
you don't drive the Atlas TX into distortion and remember to check
the battery in the power mic from time to time. Don't forget that,
if your power meter reads average power rather than PEP, it will most
likely only indicate 20 - 30 Watts (depending on the meter movement
ballistics) on normal speech when the radio is driven fully.

Enjoy the simplicity - that's one on my favourite feature too!

Regards.

Mark.

-------------------------------------------
At 20:31 05/07/2006, you wrote:

----------

*******************************************
Mark Hill - G4FPH
E-mail: g4fph@...
Current web pages at: www.g4fph.net
Old web pages at: www.qsl.net/g4fph
----------------------------------------------------------------------
Dipoles resonant on 1942 / 3720 / 7085 kHz
Three element wire beam coming soon on 14180 kHz!
----------------------------------------------------------------------
Remember - SIDE for HV safety:
S witch off
I solate
D ump
E arth
*******************************************

[Non-text portions of this message have been removed]
| 1032|1030|2006-07-06 23:21:21|Daryl Paul|Re: Atlas210x--> mic.|
73 de kb7rwa daryl
| 1033|1030|2006-07-07 08:46:43|MIKE DURKIN|Re: Atlas210x--> mic.|
whats every body opinion for the best replacement of the RCA 40582 ...??? a
mrf455 and some cutting??


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| 1034|1030|2006-07-07 10:29:01|Mark Hill|Re: Atlas210x--> PA driver transistor|
Mike,

If you look back through the reflector messages to early days of
March this year there was some useful info. on this topic.

The MRF262 got a mention (W9PB has used) and from the data sheets for
the original Atlas part (now in the files section), there would seem
to be no reason why most any CB PA output transistor should not fit
the bill electrically. Mechanically, well that's a different matter.

I would suggest you make the necessary mechanical arrangements for a
modern part (see below) and try a few different ones. From its data
sheet, an MRF455 looks completely overkill for the task (would
probably work fine as a PA rather than a driver substitute)! I would
be looking at something in the 5-15 Watt output power category, with
good gain at 27 MHz and specified for 12 to 18 Volt working. Most
likely these would come in TO220 style packages rather than flange
mount types. There are plenty of CB service manuals on the web,
could look in there for some suitable part numbers. I'm sure the
group would very much appreciate a report back on the results and
some nice high resolution digital pictures of the mods.!

Regards.

Mark.

------------------------------------------
At 07:35 07/07/2006, you wrote:

*******************************************
Mark Hill - G4FPH
E-mail: g4fph@...
Current web pages at: www.g4fph.net
Old web pages at: www.qsl.net/g4fph
----------------------------------------------------------------------
Dipoles resonant on 1942 / 3720 / 7085 kHz
Three element wire beam coming soon on 14180 kHz!
----------------------------------------------------------------------
Remember - SIDE for HV safety:
S witch off
I solate
D ump
E arth
*******************************************
| 1035|1035|2006-07-09 15:36:04|K2SSE|F.S. ATLAS 210 X|
F.S. ATLAS 210 X HF Transceiver 80 Mtrs thru 10 Mtrs Very Clean works well
on CW and SSB.Sold with great manual and DC Power cable. Use any 12Volt 16
amp supply..
It's an "Easy to use rig"
$150. I will split shipping costs to conus from Central Fl.

Al
| 1036|1036|2006-07-12 07:56:23|bikerbabes1261|REAL Biker Babes and Sexy Biker Chicks looking for fun!|
REAL Biker Babes and Sexy Biker Chicks looking for fun! Chek their
sexy photos here:
http://www.geocities.com/bikerbabes1231
| 1037|1030|2006-07-12 16:23:48|MIKE DURKIN|Re: Atlas210x--> mic.|
Has any one ever had an Atlas 210X with the RX and TX off from each other??
is there a seperate tuening?? i dont see a schematic for the PC400 Board
yet...

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| 1038|1030|2006-07-12 16:47:19|Mark Hill|Re: Atlas210x--> Transceive error|
Mike,

First off, I'm assuming that yours is not the Limited Edition ('LE')
model with RIT.

Due to the simplistic nature of the 210x and other Atlas designs, it
is certainly possible to get 'minor' transceive errors. A friend of
mine had (has?) this on his 180. The issue is I believe caused by
variation in the loading of the VFO and CIO as the oscillators are
switched around between the two mixers.

If the error you are seeing is serious - and I would say that serious
is more than 100 Hz or so either way between RX and TX - then you
could have a fault in the FET switching circuitry or perhaps one of
the mixers. Faults aside, whether it's possible to correct for any
residual transceive error by any means (there is no 'separate
tuning') I would have to take advice on or else study the circuit
some. My 215x and 210x show negligible error, so I've never had to
fix the issue myself.

Regards.

Mark.

-----------------------------------------
At 14:51 12/07/2006, you wrote:
*******************************************
Mark Hill - G4FPH
E-mail: g4fph@...
Current web pages at: www.g4fph.net
Old web pages at: www.qsl.net/g4fph
----------------------------------------------------------------------
Dipoles resonant on 1942 / 3720 / 7085 kHz
Three element wire beam coming soon on 14180 kHz!
----------------------------------------------------------------------
Remember - SIDE for HV safety:
S witch off
I solate
D ump
E arth
*******************************************
| 1039|1030|2006-07-12 17:39:38|K2SSE|Re: Atlas210x--> mic.|
I got a manual, actually a reproduction of the manual from ni4q at juno dot
com
It's excellent and all schematics are great.
PC 400 parts,voltages and schematics on pages 34 and 35

Al
| 1040|1030|2006-07-12 20:14:09|Mark Hill|Re: Atlas210x--> Manuals|
Al and others,

My friend Dave, G3YXM has put a number of Atlas manuals and related
info. on line at:

http://wireless.org.uk/atlas/

Regards.

Mark.

-----------------------------------------
At 15:53 12/07/2006, you wrote:

----------

*******************************************
Mark Hill - G4FPH
E-mail: g4fph@...
Current web pages at: www.g4fph.net
Old web pages at: www.qsl.net/g4fph
----------------------------------------------------------------------
Dipoles resonant on 1942 / 3720 / 7085 kHz
Three element wire beam coming soon on 14180 kHz!
----------------------------------------------------------------------
Remember - SIDE for HV safety:
S witch off
I solate
D ump
E arth
*******************************************

[Non-text portions of this message have been removed]
| 1041|1030|2006-07-13 03:08:44|MIKE DURKIN|Re: Atlas210x-->TX/RX shift|
Ok .. i now see the schematic... blew past it manny times ... now.. loking
at it.. i see no reason for the TX/RX shift ..... mabey a change in voltage
at the 8.5V ---- any one seen one shift a 100Hz or two on all bands??

KC7NOA



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| 1042|604|2006-07-13 15:52:47|seth_otherpower|Atlas 180|
I have an old Altas180 that has not been modified per the manual
adnedum for the dual concentric pot for the ALC .... has any one done
this before and witch board does it attach to ??
| 1043|1030|2006-07-14 08:00:16|MIKE DURKIN|Atlas210x--> Blue Mylar|
im sure its in the user sections somewhere.. but the site is down for
maitinance says yahoo ...

Sooo .. i found my reason for a dead amp .... C508 .. the 15Uf cap shorted
and burned out L503 ...

Darn those Blue Mylar caps .. iv replaced manny of those in vintage Hammond
organs and the like....

and now its in MY OWN GEAR !!!!!!

so .. ill bet its not verry critical what value choke i use for L503, as
long as it fits....

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| 1044|1030|2006-07-14 08:05:38|MIKE DURKIN|Re: Atlas210x--> Transceive error|
Thanks Mark for the reply... it must be in the VFO its self .. but not
sure.. i have a good Feq counter now and will probe at pc300 to see whom is
going off....

new question ... on pc 600 ... what on earth would make both norm/opp be
roughly 120Khz off???
the carrier osc is way off.... and its not the Fet switch on this one.. put
in another board from a working radio and same effect....


Is that +cw meant to shift the Osc freq as well ... dont know if that is a
varactor diode or??
working on my last Atlas radio (well except two 350xl's i have)


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| 1045|1030|2006-07-14 08:14:12|MIKE DURKIN|Re: Atlas210x--> Transceive error|
JESH !!!!!!!

Never mind.. i see why... even though the serial number is long gone.. i
rememebered after a few hours that in the Atlas DD6C manual that there are
some atlas radios with a different carrier osc frequency !!!! roughly 125Khz
from !!!!! silly me....

Ok .. on to the next problem of why no power out .. replaced the finals with
mrf454 and still nothing.. must of killed the darn driver.... *sigh* (yea..
i killed em with an auto tuner --- forgot to turn the power down before
hitting the tune button ... another bad day !!!)

KC7NOA

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| 1046|946|2006-07-23 01:33:24|yv5grb|Atlas210x--> Re: DD6|
Dear OM,

You are right,..they are not on he schematic of the DD6.
I found the info on the pins on the other manual (the DD6C) there is
some info you could maybe use.

73 de Eduard (YV5GRB)

--- In atlas210x-215x@yahoogroups.com, "MIKE DURKIN"
schematic ....
pG
not
_________________________________________________________________
it's FREE!
| 1047|1047|2006-07-23 01:35:42|roy|no ssb transmit in mobile|
I've found my atlas 210 x very heat sensitive in my mobile. If te temp
reached over 85 degrees there was no out put on ssb.So today I picked
up one of those ice chest ice paks at wal mart and put it in the
freezer till around noon.Went out and tried the radio and no ssb
transmit, got the ice pack out put it on top of the radio and sure
enough after a while it was transmitting again.Now the cw will trans
mit at any tempeature but there is a thermal problem with ssb and the
manual does mention it.Does any one know where the real fault lies?
Thanks
roy AA5FS
| 1048|1048|2006-08-03 13:57:36|pa0fri|Improved AGC|
Hi all members,
I have updated my Atlas-210, Atlas-210x, Atlas-215 Modification and
Information:
http://www.xs4all.nl/~pa0fri/Mods/Atlas215/AtlasEng.htm
see recent AGC design.
73,
Frits, PA0FRI
| 1049|1048|2006-08-03 15:08:56|Mark Hill|Re: Atlas210x--> Improved AGC|
Frits,

Thanks for the news and the excellent page on your web site.

I, and probably other members of the group as well, would like to
hear what you think of the 'before' and 'after' performance of the
radio, particularly for the AGC and mixer mods. Did you do make any
measurements?

Regards.

Mark.

-----------------------------------------
At 12:57 03/08/2006, you wrote:

----------

*******************************************
Mark Hill - G4FPH
E-mail: g4fph@...
Current web pages at: www.g4fph.net
Old web pages at: www.qsl.net/g4fph
----------------------------------------------------------------------
Dipoles resonant on 1942 / 3720 / 7085 kHz
Three element wire beam coming soon on 14180 kHz!
----------------------------------------------------------------------
Remember - SIDE for HV safety:
S witch off
I solate
D ump
E arth
*******************************************

[Non-text portions of this message have been removed]
| 1050|1048|2006-08-03 16:56:35|K2SSE|Re: Atlas210x--> Improved AGC|
I'll second that.
Thank you for that great information.

Al

[Non-text portions of this message have been removed]
| 1051|1048|2006-08-03 17:20:33|MIKE DURKIN|Re: Atlas210x--> Improved AGC|
I would like to know how well the replacement of the final driver with the
2sc1969 worked out.... mabey a mrf497 would be better... ???

Great page.. love it.. i might go buy some chip caps now !!!!

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| 1052|1048|2006-08-03 17:25:56|Uwe Sievers|Re: Atlas210x--> Improved AGC|
Frits,
a great site about everything on your homepage.... your work is really
outstanding
73 Uwe DJ9XG
| 1053|1048|2006-08-03 17:34:52|MIKE DURKIN|Re: Atlas210x--> Improved AGC|
Hey !!! did you Decouple R519 in the PA ??? .. if not .. try it.. you
should get more drive for the 2879's on the upper bands!!!


_________________________________________________________________
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| 1054|1048|2006-08-04 00:05:07|pa0fri|Re: Improved AGC|
I, and probably other members of the group as well, would like to
hear what you think of the 'before' and 'after' performance of the
radio, particularly for the AGC and mixer mods. Did you do make any
measurements.

== mod AGC board and vise versa, the "plop" of strong signals is cured
and the receiver sounds much more free of distortion.
Mixer mods: No measurements, I had good results in my home made
projects with the BAT diodes and a low impedance loads for the mixers.
Sure there are better diodes, but not on hand here.

I would like to know how well the replacement of the final driver with the
2sc1969 worked out.... mabey a mrf497 would be better... ???

== The signal following the transmitter input filters is amplified with
four stages with high gain. Modern transceivers are fitted with five
stages of moderated gain. That is the problem.
| 1055|1048|2006-08-04 17:14:59|MIKE DURKIN|Atlas210x--> Tuneing wand|
where do you get your tuneing wand from .. im looking for the one to fit the
filters on the atlas line..

hopefully it also the same on that 350xl's

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| 1056|1056|2006-08-04 19:51:47|K2SSE|210X ENTENDER BOARDS|
I've heard rumors that these do/did exist but I've never heard of anyone who
had one.
Does anyone know for sure?

Thanks
Al
| 1057|1056|2006-08-04 21:15:18|Tim Nichols|Re: Atlas210x--> 210X ENTENDER BOARDS|
Yes they exist. I have one and they're indispensable for troubleshooting.



Tim

N2TC



_____

From: atlas210x-215x@yahoogroups.com [mailto:atlas210x-215x@yahoogroups.com]
On Behalf Of K2SSE
Sent: Friday, August 04, 2006 1:28 PM
To: atlas210x-215x@yahoogroups.com
Subject: Atlas210x--


I've heard rumors that these do/did exist but I've never heard of anyone who
had one.
Does anyone know for sure?

Thanks
Al




---------------------------------------------------
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No threat detected.
Please visit www.winantivirus.com for more details.

[Non-text portions of this message have been removed]
| 1058|1056|2006-08-04 21:37:48|K2SSE|Re: Atlas210x--> 210X ENTENDER BOARDS|
Can you please tell me where you got yours so I can buy one?

Thank you
Al

[Non-text portions of this message have been removed]
| 1059|1056|2006-08-05 17:41:25|parkerfly3@comcast.net|Re: Atlas210x--> 210X ENTENDER BOARDS|
Wish I could but it came with the transceiver (e-bay)
-------------- Original message ----------------------
From: "K2SSE" <K2SSE@... [Non-text portions of this message have been removed]
| 1060|1030|2006-08-06 01:05:19|seth_otherpower|Re: Atlas210x--> PA driver transistor|
are you sure the driver is toast.. i thought that one of mine bit the
dust when the finals went.. turned out that the mylar cap there
shorted and opened up the choke that feeds the 12+ to it... make sure
its getting power to the driver in the first place!!!

| 1061|1061|2006-08-16 23:49:38|Irena and Richard Jenkins|Changes to Atlas PA Transistors|
Hi guys!!

Been following the discussion about PA transistors with some interest. Is there a recommended substitution for the PA ... which maybe will leave the rig producing 50 watts (rather than close to 100W) ... and which uses currently available transistors?? For use in my caravan or in a portable location 50 watts is enough! My PA's are fine ... but both the receivers in my two 210X's are in need to a tune-up! Maybe some of the AGC bypass caps need replacing too!!

73

Richard
[VK1RJ]

--
--
Irena and Richard Jenkins
'on the wallaby' (gone bush mate!!)
+++++++++++++++++++++++++++++++++++++++++++++
| 1062|1061|2006-08-17 13:19:19|Uwe Sievers|Re: Atlas210x--> Changes to Atlas PA Transistors|
Irena and Richard Jenkins schrieb:

Hi Richard,
there is an excellent info on PA0FRI, s homepage available
(www.pa0fri.geerligs.com)
go to to mods and or updates... you and others will find a lot of infos
and mods about the 210x and other models
73 Uwe DJ9XG
| 1063|1063|2006-08-23 22:27:07|hamn9iif|LOOKING FOR 2 POWER CABLES FOR THE ATLAS 210X|
LOOKING FOR 2 POWER CABLES FOR MY ATLAS 210X
THANKS JACK
J.BELTZ@...
| 1064|1063|2006-08-24 10:38:05|MIKE DURKIN|Re: Atlas210x--> LOOKING FOR 2 POWER CABLES FOR THE ATLAS 210X|
Make them out of banna plugs if you cant find an original !!!

Thats what i did ...


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| 1065|1063|2006-08-24 10:55:47|Mark Hill|Re: Atlas210x--> LOOKING FOR 2 POWER CABLES FOR THE ATLAS 210X|
Jack,

PA0FRI had a good idea, shown near to the bottom of the page here:

http://www.xs4all.nl/~pa0fri/Mods/Atlas215/AtlasEng.htm

Regards.

Mark.

------------------------------------------
At 09:37 24/08/2006, you wrote:

*******************************************
Mark Hill - G4FPH
E-mail: g4fph@...
Current web pages at: www.g4fph.net
Old web pages at: www.qsl.net/g4fph
----------------------------------------------------------------------
Dipoles resonant on 1942 / 3720 / 7085 kHz
Three element wire beam coming soon on 14180 kHz!
----------------------------------------------------------------------
Remember - SIDE for HV safety:
S witch off
I solate
D ump
E arth
*******************************************
| 1066|1066|2006-08-24 17:20:12|Steve|Atlas 210X for sale|
Hey folks, I have one up for grabs. It works OK, but could use
alignment. I wanted to try one out, not much good on CW!

I have the console, but the mic jack on the console is bad, so you
have to connect the mic to the rear of the radio. I also have the
original manual.

Not sure what to sell it for, but it is definitely up for grabs, maybe
trade for SW radio or something?

It DOES work, I have made dozens of contacts with it, I just got tired
of it.

Email me at counterspy@... if you come up with something.

73
Steve, WB9LIF
| 1068|1068|2006-08-26 16:29:49|pa0fri|PC-300C redrawnled|
Hey OM's, I redrawnled a PC-300C schematic. See Files.
| 1069|1069|2006-08-26 16:55:39|MIKE DURKIN|Re: Atlas210x--> PC-300C redrawnled|
where??



_________________________________________________________________
Check the weather nationwide with MSN Search: Try it now!
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| 1070|1069|2006-08-26 20:35:04|pa0fri|Re: Atlas210x--> PC-300C redrawnled|
--- In atlas210x-215x@yahoogroups.com, "MIKE DURKIN" ==| 1071|1036|2006-08-31 10:12:25|bikerbabes2955|REAL Biker Babes and Sexy Biker Chicks looking for fun!|
REAL Biker Babes and Sexy biker chicks looking for riding buddy! Check
their profiles here:
http://www.geocities.com/bikerbabes2925
| 1072|1036|2006-08-31 10:43:36|Mark Hill|Re: Atlas210x--> REAL Biker Babes and Sexy Biker Chicks looking for|
I'm advised by Norton and therefore such dare not look, but I bet
there's not an Atlas anywhere in sight.

Suggest you QSY up your own tail pipe!

Regards.

Mark.

-----------------------------------------
At 09:08 31/08/2006, you wrote:

*******************************************
Mark Hill - G4FPH
E-mail: g4fph@...
Current web pages at: www.g4fph.net
Old web pages at: www.qsl.net/g4fph
----------------------------------------------------------------------
Dipoles resonant on 1942 / 3720 / 7085 kHz
Three element wire beam coming soon on 14180 kHz!
----------------------------------------------------------------------
Remember - SIDE for HV safety:
S witch off
I solate
D ump
E arth
*******************************************
| 1073|1036|2006-08-31 16:35:52|John P.|Re: REAL Biker Babes and Sexy Biker Chicks looking for fun!|
I don't think that I've ever seen an HF rig on a motorcycle - except maybe on
Hogan's Heroes? Looks like spam to me.


__________________________________________________
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| 1074|1074|2006-09-01 16:29:33|cwsnail|Mods for the DD6|
Just got hold of a very nice 210X. I'm a new General class operator
and anxious to get up on HF.
I find that my DD6 does not work on the "HI" setting (seems fine on 40
and 80 meters). In trying to learn as much as I can about the rig
before I try to transmit on it and I've found a manual on line that
says I need to connect a 3 amp fuse to a "terminal 8" inside the 210X.
I've not even tried to take the unit out of the power supply dock. (do
you really just pull it out or are there any connections that need to
be removed first??)
Like I said, this is all new to me and I'm loath to do anything that
would damage the unit. Does anyone have any experience here they'd
like to share?
73's
| 1075|1074|2006-09-02 21:17:16|Douglas|Re: Mods for the DD6|
I don't know what you mean by connecting a fuse to
terminal 8. The very early 210X's did need a jumper
installed to power the DD6. If your DD6 is lighting up
and giving you the correct frequency readings on the
low setting, you do not need any mod. The problem lies
within the DD6 if the "hi" is not working.

Yes, you just gently pull the rig forward to remove it
from the power supply. The power and audio connections
are released as you pull forward.

73,

Doug/WA1TUT
| 1076|1076|2006-09-03 17:21:52|cwsnail|Atlas transmitter|
OK, been listening in on my 210X while I collected tuner and dummy
load ect. When I finally hooked up the rig, I got no output on
transmit. I sure hope the TX module is not toast but I don't know yet.
Is there anything in the 210X to look for like a fuse or reset that
might be a common problem that prevents transmission? I don't think
its the mic because I tried the transmit setting on the dial too.
73's
| 1077|1076|2006-09-03 19:00:15|George J Molnar|Re: Atlas210x--> Atlas transmitter|
Couple of questions that might help...

1) What is the rating of the power supply you are using? Can it provide
enough amperage?
2) Do you hear the click of the T/R relay when you key up? Does the receiver
mute?
3) Do you get any output in CW?
4) Can you hear anything if you try to listen to your 210x on another
receiver?

Good luck!


George J. Molnar
Chicago, Illinois, USA

-----Original Message-----
From: atlas210x-215x@yahoogroups.com [mailto:atlas210x-215x@yahoogroups.com]
On Behalf Of cwsnail
Sent: Sunday, September 03, 2006 10:21 AM
To: atlas210x-215x@yahoogroups.com
Subject: Atlas210x--
OK, been listening in on my 210X while I collected tuner and dummy load ect.
When I finally hooked up the rig, I got no output on transmit. I sure hope
the TX module is not toast but I don't know yet.
Is there anything in the 210X to look for like a fuse or reset that might be
a common problem that prevents transmission? I don't think its the mic
because I tried the transmit setting on the dial too.
73's









Yahoo! Groups Links
| 1078|1036|2006-09-12 08:10:55|canismajor01|Re: REAL Biker Babes and Sexy Biker Chicks looking for fun!|
Can't remember the exact year but the last Sturgis run I did (in the
late 70's) we camped next to a guy on a Goldwing who had a 210x
mounted on the gas tank. I was more into the bikes then and less into
the radio gig so I don't really remember what he used for an antenna.
But that was the first in the flesh look at the 210X and I was hooked.
| 1079|1079|2006-09-14 15:33:25|Joe Trachier|ATLAS 210X|
I HAVE A ATLAS 210X FOR SALE,,IT HAS BEEN IN MY MOTOR HOME FOR SEVERAL
YEARS..IF INTERESTED E-MAIL trachier@... ..
| 1080|1079|2006-09-14 23:21:59|Lloyd Green|Re: Atlas210x--> ATLAS 210X|
How much do you want for it?

Lloyd ad5ez

Joe Trachier <trachier@... I HAVE A ATLAS 210X FOR SALE,,IT HAS BEEN IN MY MOTOR HOME FOR SEVERAL
YEARS..IF INTERESTED E-MAIL trachier@... ..






[Non-text portions of this message have been removed]
| 1081|1081|2006-09-16 14:22:09|bikerguy7046|Cool biker boyz looking for life partner and ride partner!|
Cool biker boyz looking for life partner and ride partner! Check their
cool profile here:
http://www.geocities.com/bikerguy7023
| 1082|1082|2006-09-24 21:29:18|pauloserafini|Diference cards|
What deferences in the PC-100A, PC100B and PC-100C ?
PC-200A....PC-200D ?
PC300... ?

Paulo
PY3BKT
| 1083|1083|2006-09-25 15:55:41|John P.|Re: Difference cards|
Paulo wrote: "What deferences in the PC-100A, PC100B and PC-100C ?
PC-200A....PC- 200D ? PC300... ? Paulo PY3BKT"

Good question - I believe that they are just updated versions - BUT - can
anybody tell us which one appears to work the best, or had revisions worth
making to an older revision??



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| 1084|281|2006-09-25 17:29:35|MIKE DURKIN|Atlas 350XL|
Does any one know witch componet is for witch band??

A diagram some where ??

_________________________________________________________________
Express yourself - download free Windows Live Messenger themes!
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| 1085|281|2006-09-26 00:46:51|MIKE DURKIN|Re: Atlas210x--> Atlas 350XL|
Darn pic didint come through... try this

http://ph.groups.yahoo.com/group/atlas210x-215x/photos/view/b2e3?b=1


_________________________________________________________________
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| 1086|1048|2006-09-26 01:03:42|seth_otherpower|Re: Atlas210x--> Tuneing wand|
Ok.. now i know its 5/64 plastic tuening wand -- does any one know
wherre i could get one??





--- In atlas210x-215x@yahoogroups.com, "MIKE DURKIN" to fit the
McAfee®
| 1087|1087|2006-10-05 14:42:57|sm0wxz|Atlas 210 / 215 VFO unit|
Hay
I'am looking for VFO unit with digital frq counting.
Send the msg if you have one to sale.
73's
Sandy .... SM0WXZ
| 1088|1066|2006-10-19 05:25:35|haasent|Re: Atlas 210X for sale|
Did you sell this unit yet? If so , would you mind telling me the
sale price?
Will
W6DOM


| 1089|1066|2006-10-19 05:30:18|haasent|Re: Atlas 210X for sale|
| 1090|1066|2006-10-19 12:17:40|jtg4300|Re: Atlas 210X for sale|
If you want to trade for a working Hallicrafters S-108 sw receiver in
nice condition, let me know. I can email some pics.

Thanx, Jack
| 1091|1091|2006-10-19 13:42:58|A.|Re: Atlas210x--> Re: Atlas 210X for sale|
I used my 210x mobile cw with a key strapped to my leg for years.
I live in Orlando Fl area and was working in Miami Fl and made the 5 hour drive on Fri evening and again on Sunday evening and found it to be a great cw radio. I worked DXCC by accident during that run.
Sold it for $150 and now miss it.

Al
| 1092|947|2006-10-24 14:14:58|irctlcplan05|Adding 1.8 MHz to 210|
I decided to add the 1.8 MHz band to my Atlas 210, in place of the 28
MHz one.
First step, first problem. After connecting the L401 coil of the VFO
exactly as shown on the electric diagram (jumper for 1.8 and 14 MHz),
I found that there is no way to go down with the VFO itself below 8
MHz, instead of the required 7.300. Adding the required capacitor, the
VFO stops oscillating.
I guess that L401 is the same on 210 and 215.
Any suggestion?
Thanks in advance.
Michele IW2AAW
| 1093|947|2006-10-24 18:33:36|MIKE DURKIN|Re: Atlas210x--> Adding 1.8 MHz to 210|
I have a Atlas 180M with no case ill sell you...


_________________________________________________________________
Stay in touch with old friends and meet new ones with Windows Live Spaces
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| 1094|947|2006-10-25 08:55:24|irctlcplan05|Re: Atlas210x--> Adding 1.8 MHz to 210|
Thanks a lot, but I have a very limited budget...
Best regards.
Michele


--- In atlas210x-215x@yahoogroups.com, "MIKE DURKIN"
| 1095|947|2006-10-26 01:07:54|Fernand Pelletier|Re: Atlas210x--> Adding 1.8 MHz to 210|| 1096|1096|2006-10-27 07:28:50|hfforlife|My years at Atlas|
I found the cool Atlas web site and group and so was compelled to
ad my more than 2 cents.
I worked at Atlas Radio Inc. from March 1976 until September 1979
when the doors were closed. Besides family members, Herb Johnson and
sons Les and Eric, I and two other guys were the last people to get
laid off. It was a sad day for me because Atlas was a great place to
work. It was loaded with a lot of very nice people, not least among
them, the Johnson's who helped me lauch my career in HF radio
electronics manufacturing.
Prior to my job at Atlas (AR), I worked at a car wash and a number
of other dead end jobs. A friend of mine worked in the stock room at
AR, he was moving to Oregon and arranged an interview for me with
Les Johnson the Production Manager. Les hired me that day and I
started a week later. After a year in the stock room, Les called me
into his office and told me that they liked my attitude and work
habits and that they wanted to move me up. I was offered a job as a
parts buyer or a technician. I asked Les. 'which one makes more
money?' Technician was Les's answer. The next day Burr Chamblis, the
Test Department Supervisor sat me on a test bench between to old
timers (two hams in their 50's - I was 25) who taught me electronics
and troubleshooting.
I began testing modules and then assembled radios. Turns out I
had an easy grasp of this and after another year I was doing the
final check out, troubleshooting and burn-in of the completed 180's,
210X, and 215X's.
Meanwhile, I got sucked in to ham radio. I studied up and got my
General class amateur ticket in 1977 (WB6RTY). Les made sure I had
radio gear to use at home (a 210X - what else?). It was great. I was
learning, working and having fun. I would help with booth duty at
ARRL conventions. Occasionally, celebrities who owned AR's would
come around and visit. Barry Goldwater, Curtis LeMay, sports stars,
etc.
Things started to go down hill when AR introduced the 350XL which
was a bugger to develope and test. And then there was the ill fated
110X which was the entry level modular system which almost no one
bought. There were still hundreds of these on the shelves in Sept.
79 when AR went bust. There were not many 350XL's made and sold,
maybe a thousand. They're rare. I found one the other day at a
garage sale which prompted me to discover this web site.
After AR I took my new skill and got a job at Cubic Communications
which used to be Swan Electronics which also was started by Herb
Johnson. At that time the radios still had the Swan logo, a year
later the Swan logo was gone and replaced with the Cubic label.
After two years there (they both were in Oceanside, California) I
got my present job at Southcom International which made military
radios designed by Les Earnshaw who also designed the 210X. Southcom
was owned by Loral Corp. which also owned Terracom in San Diego.
Southcom merged with Terracom in 1987 which merged with Conic
(another Loral company) which was bought by Lockheed Martin in 1994
which became L-3 Communication in 1997.
In the last 30 years I have worked the the stock room, production
test, an Engineering tech, an Applications Engineer, participated in
product demonstrations around the world, marketing, product
developement and now as a product line (HF of course) production
manager. All this thanks to the good people at ATLAS RADIO.
j. neuman san diego, california
| 1097|1096|2006-10-27 08:45:55|MIKE DURKIN|Re: Atlas210x--> My years at Atlas|
j. neuman nice to make your aquaintance...

Do you have any idea with newer parts on possible updrades for the 350XL ..
i have 2 ane if done fair with .. improving the recive sencitivity...

another iv been putting off... i dont like the space given for the predriver
to the main RF deck ... its dead there .. and i dont like the cd3495 (witch
i think is probably dead --- iv replaced the finals with mrf454's ... like i
did in a few 210X's iv sold) iv been wondering if a module might work well
in this sections place...

KC7NOA


_________________________________________________________________
Use your PC to make calls at very low rates
https://voiceoam.pcs.v2s.live.com/partnerredirect.aspx
| 1098|1096|2006-10-27 10:38:29|Mark Hill|Re: Atlas210x--> My years at Atlas|
Hi there!

Welcome to the group and many thanks for the really nice slice of
history. It sounds like you had some good times at Atlas.

For all their faults, the Atlas mobiles are, I think, a beautiful
piece of Americana.

I was just a teen getting into ham radio in the late 70s. Who knows,
perhaps you even worked on my 210x and 215x!

Regards.

Mark.

------------------------------------------
At 06:22 27/10/2006, you wrote:

*******************************************
Mark Hill - G4FPH
E-mail: g4fph@...
Current web pages at: www.g4fph.net
Old web pages at: www.qsl.net/g4fph
----------------------------------------------------------------------
Dipoles resonant on 1942 / 3720 / 7085 kHz
Three element wire beam coming soon on 14180 kHz!
----------------------------------------------------------------------
Remember - SIDE for HV safety:
S witch off
I solate
D ump
E arth
*******************************************
| 1099|1096|2006-10-27 15:59:32|John P.|Re: My years at Atlas|
HFFORLIFE wrote: "110X which was the entry level modular system which
almost no one bought"

Wow - never heard of the 110x - could you tell us more about it or post
photos in the files section?

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| 1100|1096|2006-10-27 18:20:21|Tony|Re: Atlas210x--> My years at Atlas|
John,
What a GREAT story. Thanks for sharing.
It would be great if you posted this on the "Ham History" group site for
those who don't subscribe here.

73
Tony - KN4VL
Atlas/Swan Owner, User, Lover
| 1101|1096|2006-10-30 01:39:34|Christina Pauley|Re: Atlas210x--> My years at Atlas|
I have a 210X that was a gift from an old friend. I had thought the TX was DOA or even worse, that I fried it, but recently found it does still have a pulse!

I'm new to HF and had no experience with power mics and such. Was wondering if anyone would care to throw out a long distance, ball park diagnosis on this:

When keying the mic, the power meter registers a jump (on the tuner) then immediately falls until the mic is released when it jumps up again then falls to nil. In CW mode I do get a steady output with the key down (I wasn't able to get a reasonable SWR so I still haven't tried a QSO on it yet, I need to trim my random wire and learn more about using a manual tuner first). Does this sound like a short in the mic or is it something to do with the vox circuit?

What a neat radio though. I have the whole desktop power supply unit and I really like the looks of it. I'm not much of an electrician (there's an understatement) but managed to replace the on - off switch without causing any damage; quite an accomplishment for me. Got a bit of a short in the digital freq readout when the toggle is turned to the hi side. Usually can get it to work by simply turnimg the rig of and on again,

I really enjoyed reading J. Nueman's posting about working at Atlas. Its much more fun to listen to something that's not totally digital and cookie cutter-ed to look like every other rig. I'm looking forward to my first QSO in CW on it if I can find someone with the patience to copy at 7 WPM! Which brings up another question: is there a preferred freq or a spot on say 40 meters where folks tend to do more slow CW than anywhere else on a particular band???

73's all,
K.Pauley KB9WVI




[Non-text portions of this message have been removed]
| 1102|1096|2006-10-30 11:17:16|Jack Griffin|Re: Atlas210x--> My years at Atlas|
WVI, WELCOME.
I have no info on the TX problem, but do know that you will get a CW QSO at the same speed that you sending. Since most people can send faster than they can copy, make sure that you send slower than your top speed or you may not be able to copy. You will be surprised at how many folks will give you the courtesy of dropping down to your speed.
73, Jack

Christina Pauley <kb9wvi@... I have a 210X that was a gift from an old friend. I had thought the TX was DOA or even worse, that I fried it, but recently found it does still have a pulse!

I'm new to HF and had no experience with power mics and such. Was wondering if anyone would care to throw out a long distance, ball park diagnosis on this:

When keying the mic, the power meter registers a jump (on the tuner) then immediately falls until the mic is released when it jumps up again then falls to nil. In CW mode I do get a steady output with the key down (I wasn't able to get a reasonable SWR so I still haven't tried a QSO on it yet, I need to trim my random wire and learn more about using a manual tuner first). Does this sound like a short in the mic or is it something to do with the vox circuit?

What a neat radio though. I have the whole desktop power supply unit and I really like the looks of it. I'm not much of an electrician (there's an understatement) but managed to replace the on - off switch without causing any damage; quite an accomplishment for me. Got a bit of a short in the digital freq readout when the toggle is turned to the hi side. Usually can get it to work by simply turnimg the rig of and on again,

I really enjoyed reading J. Nueman's posting about working at Atlas. Its much more fun to listen to something that's not totally digital and cookie cutter-ed to look like every other rig. I'm looking forward to my first QSO in CW on it if I can find someone with the patience to copy at 7 WPM! Which brings up another question: is there a preferred freq or a spot on say 40 meters where folks tend to do more slow CW than anywhere else on a particular band???

73's all,
K.Pauley KB9WVI



[Non-text portions of this message have been removed]






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| 1103|1103|2006-10-30 15:43:09|John P.|Atlas 215 Power Microphone?|
Hi All,
Is there a benefit to using a 'power mike' with the Atlas 215 (and
215x)? Would it keep the modulation and power output at a higher
level? Any danger of overdrive, overhead of finals? Any suggestions
on a brand for the power mike would be appreciated.
73's
John




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| 1104|1096|2006-10-30 22:02:16|K5HML - Harry|Re: Christina - Atlas210x|
Christina,

Since, on voice, the rig is operating in SSSC (Single Sideband
Suppressed Carrier) mode, the transmitter does not (and
should not) transmit a steady carrier as it would if you were
operating on AM.
Your meter will only indicate power output on voice peaks
while you are talking into the microphone, so the needle will
bounce up and down while you are talking.

On AM operation (which the Atlas does not), a carrier is
transmitted which the meter would indicate as continuous
power output.

On CW, the rig inserts a steady carrier, which you key on and off,
and the meter indicates the power output during key-down.

There most likely is nothing wrong with your rig --- it seems to be
operating normally.

The indication of a power pulse when the mic is keyed on and off
is also usually normal --- in most cases, there is a pulse when
the PTT or VOX is switched back and forth between transmit and
receive --- the person on the receiving end will hear it.

As for using an amplified microphone --- personally, I prefer
not to. The speech preamp in my 215X has enough gain to
perform well with a good-quality hi-Z dynamic mic.
My (non-amplified) microphones which have sounded well are:
Collins MM-1 mobile mic;
Euphonics (maybe a CB mic (?), I don't know but it works fine)
mobile mic, model # unk;
For home station use in the power supply/console, I also use
non-amplified Astatic D104 (the lollipop) and 10D (bullethead)
microphones on the grip-to-talk stands.
I also get excellent audio reports using these mics with my
Swan 500CX.

Have lots of fun with the 210X.

73,

Harry, K5HML
San Antonio, Texas


Christina Pauley <kb9wvi@... When keying the mic, the power meter registers a jump (on the tuner)
then immediately falls until the mic is released when it jumps up again
then falls to nil.
In CW mode I do get a steady output with the key down (I wasn't able to
get a reasonable SWR so I still haven't tried a QSO on it yet, I need to
trim my random wire and learn more about using a manual tuner first).
Does this sound like a short in the mic or is it something to do with the
vox circuit?




Harry, K5HML
San Antonio, Texas

---------------------------------
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[Non-text portions of this message have been removed]
| 1105|10|2006-10-31 17:02:48|atlas210x-215x@yahoogroups.com|New file uploaded to atlas210x-215x |
Hello,

This email message is a notification to let you know that
a file has been uploaded to the Files area of the atlas210x-215x
group.

File : /Atlas schematics/17m vfo mod.gif
Uploaded by : pa0fri <pa0fri@... Description : Modifiaction VFO, 17m instead of 10 m

You can access this file at the URL:
http://groups.yahoo.com/group/atlas210x-215x/files/Atlas%20schematics/17m%20vfo%20mod.gif

To learn more about file sharing for your group, please visit:
http://help.yahoo.com/help/us/groups/files

Regards,

pa0fri <pa0fri@...| 1106|1106|2006-10-31 17:13:01|pa0fri|Modifiaction VFO, 17m instead of 10 m|
Hi all, I am planning for adding 17 m instead of 10 m in an Atlas
210X. The VFO mod is easy and works, see my pa0fri "Files" on this
Yahoo group. Mod of PC-800, PC-900 and PC-100/1020 are under construction.
| 1107|1106|2006-11-01 19:01:07|irctlcplan05|Re: Modifiaction VFO, 17m instead of 10 m|
Dear PA0FRI,

I see that you are modifying the 210X VFO.
May I ask you if you ever tried to go down with it to abt 7.300 MHz?
I am trying to replace the 10 mb with the 180 mb, but the VFO stops
oscillating at the required frequencies.
Thanks in advance.
Michele IW2AAW


| 1108|1108|2006-11-01 21:43:21|Fernand Pelletier|Replace parts|
Hi all,
I have a question, is-it very hard to find parts to fix the 210 X transceiver?

Thank you

Fernand


| 1109|1103|2006-11-02 06:56:52|John Neuman|Re: Atlas210x--> Atlas 215 Power Microphone?|
The 215 and 215X have PLENTY of mic drive and modulation. A power mic would be overkill in my experience. I always used a Shure 44c handmic with excellent results.
j.n.

"John P." Is there a benefit to using a 'power mike' with the Atlas 215 (and
215x)? Would it keep the modulation and power output at a higher
level? Any danger of overdrive, overhead of finals? Any suggestions
on a brand for the power mike would be appreciated.
73's
John




____________________________________________________________________________________
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| 1110|1096|2006-11-02 06:57:51|John Neuman|Re: Atlas210x--> My years at Atlas|
Tony,
Thanks for the kind words. I could go ON AND ON about my years at Atlas, which I consider the 'Golden Years' of my career. Got a URL for this Ham History site?
j.n.

Tony <kn4vl@... John,
What a GREAT story. Thanks for sharing.
It would be great if you posted this on the "Ham History" group site for
those who don't subscribe here.

73
Tony - KN4VL
Atlas/Swan Owner, User, Lover




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| 1111|1096|2006-11-02 07:40:51|John Neuman|Re: Atlas210x--> My years at Atlas|
Mark,
Thank you. I tested EVERY Atlas radio shipped from early 1978 to Sept. 1979. We had one 210X which had been in a car fire. It was TOASTED like it was an overcooked char-broiled steak, BUT it still worked. We used to display it at conventions. People could come buy the booth and key it. We had it transmit into a 100 watt lightbulb dummy load. The bulb would light up, everyone would be impressed with what a hearty little take a beating piece of gear we made. Then later, near the end, it was thrown in the trash. I took it out of the trash and put a used cover, front panel and dial drum on it and used it for years. I wish I still had it. I traded it to a guy for a RBC-5, a World War II receiver which was very cool.
j.n.

Mark Hill <g4fph@... Hi there!

Welcome to the group and many thanks for the really nice slice of
history. It sounds like you had some good times at Atlas.

For all their faults, the Atlas mobiles are, I think, a beautiful
piece of Americana.

I was just a teen getting into ham radio in the late 70s. Who knows,
perhaps you even worked on my 210x and 215x!

Regards.

Mark.

------------------------------------------
At 06:22 27/10/2006, you wrote:

*******************************************
Mark Hill - G4FPH
E-mail: g4fph@...
Current web pages at: www.g4fph.net
Old web pages at: www.qsl.net/g4fph
----------------------------------------------------------------------
Dipoles resonant on 1942 / 3720 / 7085 kHz
Three element wire beam coming soon on 14180 kHz!
----------------------------------------------------------------------
Remember - SIDE for HV safety:
S witch off
I solate
D ump
E arth
*******************************************





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| 1112|1108|2006-11-02 10:20:22|MIKE DURKIN|Re: Atlas210x--> Replace parts|
for the driver -- the original is a serious pain ... but there are more
common parts that can be co-ursed into working.

_________________________________________________________________
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| 1113|1106|2006-11-02 15:52:45|pa0fri|Re: Modifiaction VFO, 17m instead of 10 m|
Hi Michele,
Did you wired the VFO correctly for 160 m?
See attachement (in my direct email to you).
Frits, PA0FRI
| 1114|1108|2006-11-03 04:01:46|Fernand Pelletier|Re: Atlas210x--> Replace parts|
So I see, I need to look auround my place what I can find exactly about those driver. Did you find a place or a compagny where you can have similar parts? I suppose If I need to replace one of those crystal like the one of 100 KHZ on the Pc 820. Do you thing It will be able to find one somehere?

Thank's

Fernand


| 1115|1108|2006-11-03 10:11:16|MIKE DURKIN|Re: Atlas210x--> Replace parts|
the crystals.. yea.. thats a peice of cake...

you can have any crystal manufacture make you a crystal to replace them...


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| 1116|1116|2006-11-03 11:10:52|Paul Allen|215x|
I have the 215x and having great fun with it. The only problem
currently is that I cannot get the rig to transmit in cw even with the
mic gain turned up and down. I need a carrier to tune the antenna and
all I get out of the rig is about 0.5 watt key down, otherwise it is
fine on phone. Appreciate your help.
Brgds
Paul
ZR1PJA
| 1117|1116|2006-11-03 12:43:05|MIKE DURKIN|Re: Atlas210x--> 215x|
did you try the alc at minimum ??


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| 1118|1118|2006-11-04 16:09:45|pa0fri|ATLAS-210x mod 17m instead of 10m|
Hi all members, I have successfully modified my ATLAS-210X for 17 m
instead of 10m. See my homepage for details:
http://www.xs4all.nl/~pa0fri/Mods/Atlas215/AtlasEng.htm
73, Frits.
| 1119|1116|2006-11-07 19:01:16|MIKE DURKIN|350XL|
Does any one know how to open the dial of a 350XL ... the part that dose the
10 to 1 turn(not sure what it is value wise) ..

I have a 350 that the inner dial and the outer dial are almost 1:1 and when
turned in one direction slips alot and the other.

is the inner brass nut turned CW or CCW .. and possibly what tool to use and
even where to get it??

_________________________________________________________________
Find a local pizza place, music store, museum and more�then map the best
route! http://local.live.com?FORM=MGA001
| 1120|1116|2006-11-11 07:26:50|John Neuman|Re: Atlas210x--> 215x|
Make sure the SSB switch is in the 'norm' position or maybe a problem with the PC600 card.

Paul Allen <pjallen@... currently is that I cannot get the rig to transmit in cw even with the
mic gain turned up and down. I need a carrier to tune the antenna and
all I get out of the rig is about 0.5 watt key down, otherwise it is
fine on phone. Appreciate your help.
Brgds
Paul
ZR1PJA





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| 1121|1121|2006-11-12 20:49:58|joeec_57|Atlas 210X off frequency|
Gentlemen:

I could use some advice. I have an Atlas 210X that was bought new
(1977) and used about 6 times by my mother before she passed away.
Today I put it on the air (40 meters SSB) and was told that my transmit
frequency was off. Evidently the xmit and receive freq. are not the
same. How can they be aligned so that they are exactly the same ?

Thanks, Joe, K4LL K4LL@...
| 1122|1121|2006-11-12 21:02:47|MIKE DURKIN|Re: Atlas210x--> Atlas 210X off frequency|
its my exsperiance that the switching fets on the pc-300 board cause the
split problem.


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| 1123|1121|2006-11-13 05:51:21|joeec_57|Re: Atlas210x--> Atlas 210X off frequency|
Mike,
Thanks for the advice on the problem listed below. Since the
difference between xmit and receive is probably less than 1 or 2 KHz,
I would guess that I would not have to replace the FETs. Isn't there
a way to zero beat the xmit and receive frequencies together without
having to replace the FETs?

Joe, K4LL






--- In atlas210x-215x@yahoogroups.com, "MIKE DURKIN" cause the
transmit
the
| 1124|1121|2006-11-13 13:30:30|pa0fri|Re: Atlas 210X off frequency|
Today I put it on the air (40 meters SSB) and was told that my transmit
frequency was off. Evidently the xmit and receive freq. are not the
same. How can they be aligned so that they are exactly the same ?

Thanks, Joe, K4LL K4LL@...

== contacts the load on the VFO is not stable.
73, Frits, PA0FRI
| 1125|1125|2006-11-15 03:43:07|ke4unc_owensboro|just bought an atlas 210x for 125 bucks!!!!!!!!|
i had open heart surgery a month ago, and to stay busy i am studing
to upgrade my ticket to general. needed an hf rig and this one seems
to be a good choice. see yall later
| 1126|1121|2006-11-17 13:09:29|Steve Chambers|Re: Atlas210x--> Re: Atlas 210X off frequency|
I found that the chassis mounted voltage regulator feeding the VFO was
the problem , the voltage was not being regulated correctly, the
voltage feeding the VFO was different when switching between TX and RX
after replacing all the R's and the regulator, the TX and RX are now
the same and I can work PSK31 without a frequency offset.
Hope this helps
Steve. G8IHT



| 1127|1121|2006-11-18 20:02:24|MIKE DURKIN|Re: Atlas210x--> Re: Atlas 210X off frequency|
witch one is it?? is it the one mounted between the to boards on the left on
the chassis ??...


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| 1128|1121|2006-11-21 23:04:52|John P.|Re: Atlas 210X off frequency|
I believe that it's the 3-legged 7805 voltage regulator that they are
referring to....



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| 1129|1129|2006-11-22 20:45:54|John P.|"New Ham Bands"|
Hi Everyone,
Is there anyone out there working on mods for Atlas rigs for the 'new'
USA ham bands that take effect on December 15, 2006?

73's
John



____________________________________________________________________________________
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| 1130|1130|2006-11-24 07:52:14|moody_reggie|A "novice" question|
I have a 210 which measures about 30 watts on CW (with antenna tuner)
but has a horrible squeal and CW tone hwen mic is keyed. Meter on
radio also rises about a third of the way. Is there something wrong
with the mic circuits or is that an oscillation of some type?

Thanks,

Reg
| 1131|1131|2006-12-01 19:29:16|Jerry|215x Tx Rx Freq Offset|
I found the VFO was shifting on Tx by monitoring the VFO with a general
coverage Rx. To solve the problem I used 15 meters (worse case) and
loaded pin 10 on PC-300 with 300pf . The max value can be determined
watching the power out, When it starts to drop that is the max value.
My Tx and Rx are now on the same freq.....Good luck W9PB.
| 1132|1081|2006-12-06 11:56:20|bikerguy0420|Cool biker boyz looking for life partner and ride partner!|
Cool biker boyz looking for life partner and ride partner! Check their cool profile here:
http://www.bestbikerclub.com/bikerpro/datebiker.htm
| 1133|1133|2006-12-07 00:28:17|frank@electronicinstrument.com|Re: spare filter|
I have a spare filter for the 210X
If interested, email me direct at frank@...
Frank KG9H

[Non-text portions of this message have been removed]
| 1134|1134|2006-12-11 04:02:02|Al Woodhull|Atlas 210/210x versions and serial numbers|
I have had a 210x for 14 years. Recently I've been reviewing info
I have collected about the Atlas transceivers. I have started to
compile a chronology, including service notes and info from ads in
Ham Radio magazine from the 1975-1977 period.

What I have at this point is a long, but incomplete document -- too
long to post as a message to the group, but not complete enough that
I want to post it as a file yet.

I'd like to try to get some information on serial numbers -- if
anyone can provide me with information on the serial number of their
210/215 or 210x/215x and either the production date or where it
seems to fit in the sequence of modifications to the design that
would help me make this project more useful. I have very few data
points for this correlation at present.

Here are some important points in the chronology:

Early 1975: the 210 and 215 were introduced.

April - June 1975: several service notes mention fixes for
problems with early units, incorporated in newer units with
serial numbers after 2300.

August 1975: date on schematic of the early version of the optional
noise blanker, with a panel-mounted variable threshold control.

October 1975: first ads for 210x/215x appear. Expanded frequency
range includes full coverage of all bands up to 15 meters, partial
coverage of 10 meters. New color scheme for frequency readout and
S-meter.

December 1975: first picture in an ad of a unit with a
factory-installed noise blanker (adjustable type).

Sometime in 1976: i.f. frequency changed from 5520-5523.3 KHz
to 5645-5648.3 KHz. Serial numbers with prefixes TB, TC. etc, to
TL have 5520 KHz i.f., serials of 5645 KHz i.f. units begin with
TM, TP, etc.

January 1977, date on schematic of new version of noise blanker
with on/off switch instead of variable threshold control, but ads
in early 1977 still show the variable threshold version.

May 1977 or later, ads show on/off noise blanker or front panel
with plugged hole labelled NB.

Any information that could connect serial numbers with changes or
dates would be appreciated.

My own 210x is S/N TK7886, which I imagine was manufactured in
1976. It is a late 5520 KHz. i.f. unit with a variable threshold
factory-installed noise blanker.

73,

Al N1AW
| 1135|1134|2006-12-11 06:11:25|Rolf Sieker|Re: Atlas 210/210x versions and serial numbers|
My Atlas 210x has the serial no. TM 13480 and has the on/off noise
blanker switch and came with power supply AR-117 serial no. PS 1445,
perhaps a later model than the CS-220. Don't know year of manufacturing
though.
| 1136|1134|2006-12-11 12:44:55|Mark Hill|Re: Atlas210x--> Atlas 210/210x versions and serial numbers|
Al,

Interesting project - can't wait for the results! Would be nice to
see some high quality scans of all the advertising materials, in particular.

I own two Atlas at present:

A 215x, serial TJ3788 (5520 kHz IF). No noise blanker fitted.

A 210x, serial TK7048 (5520 kHz IF). No noise blanker fitted.

Back in the 1980s, I had another 210x installed in my car. Sadly,
this was stolen and never recovered. Serial was TP11047 (5645 kHz
IF, no noise blanker fitted).

Regards.

Mark.

------------------------------------------
At 01:59 11/12/2006, you wrote:
*******************************************
Mark Hill - G4FPH
E-mail: g4fph@...
Current web pages at: www.g4fph.net
Old web pages at: www.qsl.net/g4fph
----------------------------------------------------------------------
Dipoles resonant on 1942 / 3720 / 7085 kHz
Three element wire beam coming soon on 14180 kHz!
----------------------------------------------------------------------
Remember - SIDE for HV safety:
S witch off
I solate
D ump
E arth
*******************************************
| 1137|1137|2006-12-13 06:41:07|Al Woodhull|Adjusting 210x carrier oscillator|
I was having trouble getting people to hear me on c.w. and I realized
the problem is that my carrier is not shifting as much as it should
when I transmit, so I had to tune in other stations at a very low tone
in order to transmit on their frequency.

I have an earlier 210x with the 5520 KHz i.f. I checked with a good
frequency counter and my "normal" carrier frequency is 5520.192 -- I
suppose not too bad for a rig that is this old. But it only shifts to
5520.235 in the CW position, which is only a 43 Hz shift. It should
shift about 800 Hz.

My "opposite" carrier frequency is further off, it should be 5523.3
but it is 5521.534, so I suppose if I am in there I should adjust it.

Can anyone recommend a procedure for adjusting the carrier
frequencies? A big part of the problem will be getting access to the
trimmer capacitors C602 and C603 on the PC-600 board. I'm supposing I
will have to unfasten the board from the chassis and twist it around
without shorting anything out to get it into a position where I can
reach the trimmers.

On the 5520 KHz i.f. PC-600 there are only two trimmers, C604 is a
fixed capacitor -- it seems to be a trimmer on the 5645 KHz i.f.
version of PC-600. If I understand the circuit correctly, C604 is in
parallel with C603 when receiving and in sideband mode, and is
effectively removed from the circuit when the +CW voltage goes high,
so the frequency will rise. Has anybody tried, and/or would anybody
recommend trying to replace C604 with a trimmer? I haven't had a good
enough look at the board yet to see if this would be physically easy
to do.

73,

Al, N1AW
| 1138|1137|2006-12-13 15:26:56|Jerry Spears|Re: Atlas210x--> Adjusting 210x carrier oscillator|
Hi Al, I would check the diodes D602 and D601. The trimmers can be easily adjusted without removing the board.....Jerry W9PB

Al Woodhull <aswoodhull@... the problem is that my carrier is not shifting as much as it should
when I transmit, so I had to tune in other stations at a very low tone
in order to transmit on their frequency.

I have an earlier 210x with the 5520 KHz i.f. I checked with a good
frequency counter and my "normal" carrier frequency is 5520.192 -- I
suppose not too bad for a rig that is this old. But it only shifts to
5520.235 in the CW position, which is only a 43 Hz shift. It should
shift about 800 Hz.

My "opposite" carrier frequency is further off, it should be 5523.3
but it is 5521.534, so I suppose if I am in there I should adjust it.

Can anyone recommend a procedure for adjusting the carrier
frequencies? A big part of the problem will be getting access to the
trimmer capacitors C602 and C603 on the PC-600 board. I'm supposing I
will have to unfasten the board from the chassis and twist it around
without shorting anything out to get it into a position where I can
reach the trimmers.

On the 5520 KHz i.f. PC-600 there are only two trimmers, C604 is a
fixed capacitor -- it seems to be a trimmer on the 5645 KHz i.f.
version of PC-600. If I understand the circuit correctly, C604 is in
parallel with C603 when receiving and in sideband mode, and is
effectively removed from the circuit when the +CW voltage goes high,
so the frequency will rise. Has anybody tried, and/or would anybody
recommend trying to replace C604 with a trimmer? I haven't had a good
enough look at the board yet to see if this would be physically easy
to do.

73,

Al, N1AW






[Non-text portions of this message have been removed]
| 1139|1137|2006-12-13 17:08:37|Al Woodhull|Re: Atlas210x--> Adjusting 210x carrier oscillator|
--- In atlas210x-215x@yahoogroups.com, Jerry Spears Hello Jerry, and thank you for the hint. I haven't tried it yet, but
in principle any test I can do without actually changing anything is
less likely to get me into additional trouble.

When I wrote my first message I hadn't removed the bottom cover yet;
now I can see that the trimmers should be easy to adjust. But I'll try
to determine that all voltages are consistent with all components
being OK.

73, Al

| 1140|1140|2006-12-15 06:38:43|frank@electronicinstrument.com|Re: Netting of the three caps for 5.645Mhz IF|
I just got a SSB filter from Sherwood.
My IF is the latest IF, 5.645Mhz.
Problem is that my manual has the older version, with two caps for 5520Mhz (5.523.3 & 5.520Mhz)
The frequencies are therefore incorrect.
Anyone have a PC-600 schematic and information for the frequencies to net mine to?
I have used my 706 in the past and just netted for zero beat but need to know the three frequencies.

Warm Regards, Frank KG9H

Frank Krozel, Technical Representative,
Electronic Instrument Associates Central, Inc.
Website: http://www.electronicinstrument.com
Voice: 630-924-1600 Fax: 630-477-0321
This e-mail message may contain privileged or confidential
information. If you are not the intended recipient, you may not
disclose, use, disseminate, distribute, copy or rely upon this
message or attachment in any way. If you received this e-mail
message in error, please return by forwarding the message and
its attachments to the sender.

[Non-text portions of this message have been removed]
| 1141|1140|2006-12-15 14:40:36|Al Woodhull|Re: Netting of the three caps for 5.645Mhz IF|
--- In atlas210x-215x@yahoogroups.com, frank@... wrote:
In the yahoo group files area
http://groups.yahoo.com/group/atlas210x-215x/files/
the file atlas_210x.pdf has circuits for the newer i.f.

As I mentioned in an earlier post, I have one of the later 210x units
that still uses the 5520 KHz i.f. (S/N TK7886), and I also have an
original manual dated Jan 1977 for a 210x with the 5645 KHz i.f. (My
manual is slightly newer than the atlas_210x.pdf file). Other than the
crystals there is only one difference in the circuits of the PC-600
board, this is that C604 is a fixed 15 pf capacitor for the 5520 KHz
units and C604 is a 50 pf variable capacitor in 5645 KHz units. There
is also an operational differenc, the +8.5 V line in the earlier units
is +10 V in the newer ones. This is the result of a different zener
diode at D2 in the chassis schematic.

As for alignment, there are no instructions in any of the manual
versions or other information I have found. I presume one should
adjust C602 for 5523.3 or 5648.3 KHz output from PC-600 in the "Opp"
sideband position. For the "normal" sideband C603 and C604 in parallel
set the 5520 or 5645 KHz for sideband operation, and the frequency
should be 800 Hz higher for c.w. operation, when C604 is ineffective.
For the 5520 units only C603 is adjustable. For a 5645 unit I think
the procedure should be to adjust C603 for 5645.8 KHz in c.w. mode,
then switch to sideband normal mode and adjust C604 to pull the
oscillator frequency down to exactly 5645.

Disclaimer: I haven't tried to align my 210x yet. I had a suggestion
that the failure of my unit to properly shift the carrier frequency in
c.w. mode is due to a bad diode and I am still contemplating how to
get the PC-600 board free of the chassis so I can access components
on the board.

Incidentally, although this board is described as PC-600 in all the
manuals I have seen, the board in my older 210x has the designation
PC-600B etched in the foil, so presumably there was an earlier A
version, perhaps used in the earlier 180 or the 210.

73, Al N1AW
| 1142|1142|2006-12-17 05:11:11|Al Woodhull|PC-600 carrier oscillator board access and repair in 210X|
My project to correct the c.w. offset on my 210x is going slowly.

Jerry Spears suggested the problems I have with incorrect carrier
offset in c.w. mode might be due to one of the diodes D601 or D602
being bad. I measured the voltage at the junction of R601 and R602 (as
well as I could figure out where this is on the exposed foil-only side
of the PC-600 board, and indeed it seems that the voltage is not what
it should be and does not change as it should when I switch from ssb
mode to c.w. mode.

I haven't found any documentation of what the voltage at this point
should be, but my analysis of the circuit is this: when the +CW line
is high, D601 will be reverse-biased (making C604 ineffective, and
thus increasing the oscillator frequency), and the voltage at this
point should then be determined just by the R602-R601 voltage divider
across the +8.5 line, approximately 2.125 V. When the +CW line is at
ground D601 will be forward biased (thus shunting C604 across C603 and
lowering the frequency) and the voltage at the junction of R601 and
R602 will be lower -- exactly how much will depend upon the voltage
drop across D601, but ignoring this, the effect will be to put R604 in
parallel with R601.

What I measured was 1.66 V at the R601-R602 junction in c.w. mode, and
a small decrease to 1.60 V in ssb mode. This makes me think that D601
may be shorted.

Now my questions: First, I'm a little bit unsure I'm poking at the
right place on the foil side of PC-600, since it is impossible to see
the components mounted on the other side. I need to free the board to
get it out (and to replace components if necessary). How do I do this?
It is held in place by screws at the lower left corner and the top
right corner. The lower screw can be removed, but I can't see any way
of getting at the upper screw without removing the S-meter, and I
can't figure out how to do that.

Second, I could be more sure of my testing if I could visualize the
the component layout on PC-600. Among all of the pictures of 210x
components I have found on the web I have not found any pictures of
the top and bottom of this board (perhaps because it is so difficult
to see it or extract it for photography). Does anyone have such
pictures or know of a site where they can be found?

Finally, does anyone know a source for a replacement for D601? It is
listed as a BA182. I found some data on the web that indicates this is
a VHF switching diode but there is little other info. It seems to be
an obsolete type? Can someone suggest an easier-to-obtain replacement?

73, Al N1AW
| 1143|1143|2006-12-23 20:30:26|Al Woodhull|Removing the S-meter in Atlas 210x|
It's been almost a week since the last time I asked for help and I
still don't know how to get at the carrier oscillator card (PC-600).

The most basic thing I need to know is how to dismount the S-meter.
With the S-meter in place I can't see many of the components on the
carrier oscillator board. Also, with the S-meter in place I can't
loosen one of the screws that holds the board in place.

There are two small screws set into the back of the S-meter, but
loosening them has no effect that I can discern (I am reluctant to
apply too much force). On the front panel the metal label that says
"Atlas-210x Solid State" looks like it might be glued in place and
could cover mounting screws for the meter, but I'm reluctant to try to
pry this up and possibly damage the appearance of my unit without
knowing that is what I need to do.

I've made some progress. I took a picture of the visible part of the
PC-600 board foil side, imported it into GIMP, blew it up, and added
freehand the portions of the foil that were hidden in the picture. I
then flipped the picture to show the component side and began to make
an overlay of the parts I could identify. But I can't visualize many
of the parts closest to the front panel. If I could remove the meter I
could finish the job of diagramming the layout and I could remove the
card if it turns out to be necessary to replace any component.

I'll share my layout diagram this with the group when I complete it,
of course.

73,

- Al, N1AW
| 1144|1143|2006-12-23 21:54:11|Ken Burchfield|Re: Atlas210x--> Removing the S-meter in Atlas 210x|
Al, I can not help with the s meter dismount question,
Guess you have already looked thru the links and files on group site.
all the info that I would have is already there, but if you need the circuit for the PC-600 here is the link
http://wireless.org.uk/atlas/diagram2.htm
or if the attachment works here is the image.
There are some good pictures on the site. the mechanics of the Atlas all look about the same to me.
Sorry all I can offer
Would be interested in the final ifo just in case I have rip into mine.
73
Ken


Al Woodhull <aswoodhull@... still don't know how to get at the carrier oscillator card (PC-600).

The most basic thing I need to know is how to dismount the S-meter.
With the S-meter in place I can't see many of the components on the
carrier oscillator board. Also, with the S-meter in place I can't
loosen one of the screws that holds the board in place.





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