3035 W/3D USA

Great Cabinet.
The FM dipole is forced into the SW/AM antenna jack. Rear wood frame a bit fractured.	Record speaker connections.		Remove, protect and store the dial scale glass. It is made with "Unobtainium".	Glue and clap split wood.
This IF has a moving coil connected to the Treble control with a dial cord.	The moving coil is stuck.	There is a deposit of something hard.
	It is functioning well after considerable work.	You can see the dial cord that moves the IF plunger when the Treble control is turned.	The specified eye tube is an EM85. It is quite expensive and hard to find. I could not find one that I trust to use. I researched a substitute based on performance specs. The EM81 tube is a fine sub. The pin connections are different and the electrical specs are very close.
Seal up all the alignment controls from slipping. You can see the green candle wax and the old nail polish.	To seal the trimmers use Glypt or something that cracks easily off for the next alignment.	This tweeter is fine. Plays loud (for a Grundig). No repairs needed.	This side speaker had some dirt creating a Buzzing/rattling. A bit of dusting took care of that.	This is an STSP toggle switch that is wired in series with the eye tube plate. It is used to turn off or "blank" the eye tube. Eye tubes only last for about 1000 hours then fade out. Use of this blanking switch should extend the life of this hard to get tube.
This brass has a classic worn look. Some people would never modify the original finishes of an antique (100 yrs old). That would lower the value. And this finish is far from needing replaced. This radio was manufactured in 1955 to 1956 time frame.		This side grill cloth can be easily replaced by removing the four grill retaining screws.	The wood finish is in great shape. A rub down of Rejuvenating oil darkened the tiny scratches and removed any old wax. The front grill looks new. The New eye tube looks great too.	This is what it will look like when the lights are dim with a cool drink in your hands! Happy Holidays.

DIN Switchbox

I wanted to hook up some external audio sources to the Grundig. So I took a Radio Shack switch box modified the circuit board and added video quality dual shielded coaxial cable terminated with a three pin DIN. It works well.

The output of the Grundig is routed to the two RCA output jacks on the switchbox. This provides for recoding off of the air programs on AM, FM or SW bands. The signal seems a little weaker than standard line output so the recorder's manual gain had to be set high.

Three inputs can be selected with the three push buttons. I have hooked up a DVD player playing Shania Twain "UP" album, A cassette tape deck (I tested the off the air recordings) and a monaural source, my FM amateur radio transceiver. All three sounded GREAT through the Grundig.

Use the tape button on the front panel of the Grundig to play the source going through the switch box.

This is a 3055 with 3D sound USA Version. This case is in Excellent shape. Nothing needs done with the wood finish. The plastic parts were cleaned and treated with Glayzit. The Dial glass cleaned and the red line on the FM indicator repainted.

This is the second of two featured 3035s.

3035 w/3D USA

Selenium Bridge Rectifier retrofit with 1N4007.

Also see the bottom half of the Electrostatic Tweeter page for the 3035 tweeter repair.

DIN Switchbox

I wanted to hook up some external audio sources to the Grundig. So I took a Radio Shack switch box modified the circuit board and added video quality dual shielded coaxial cable terminated with a three pin DIN. It works well.

The output of the Grundig is routed to the two RCA output jacks on the switchbox. This provides for recoding off of the air programs on AM, FM or SW bands. The signal seems a little weaker than standard line output so the recorder's manual gain had to be set high.

Three inputs can be selected with the three push buttons. I have hooked up a DVD player playing Shania Twain "UP" album, A cassette tape deck (I tested the off the air recordings) and a monaural source, my FM amateur radio transceiver. All three sounded GREAT through the Grundig.

Use the tape button on the front panel of the Grundig to play the source going through the switch box.

I was curios to the frequency response of this modification. There are a lot of people rightfully concern with audio losses due to cable losses. So I preformed a little test.

Unfortunately, I did not own an Audio Generator so I used the lower end of my RF generator (HP-606a) along with a 100mhz B&K Oscilloscope and a 100k ohm termination resistor (as in the Grundig).

I found no frequency roll off between the frequencies of 56khz and 20 mhz. Therefore, I can conclude frequencies below 56khz down to DC are also unaffected.

This is a third 3035 restored.