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7-Tube 1938 Truetone 3-Band Radio

We acquired this radio from an antique junk dealer back in 1988. It's a beautiful work of period art.
Condition of this radio is very good. The scratches on the cabinet have been touched up, waxed down and polished up. The brass shines brightly and the dial glows an eery green. The radio has been rebuilt and works. It features:

Truetone Radio

We do not have any original cabinet photos
of this radio, but it was very similar to the
original condition of our
Stewart Warner radio.
This is the first radio in our collection.

*AM, SW1, SW2 Radio bands
*Superhetrodyne receiver
*Automatic Volume control
*Electric eye tuning
*Shadow dial face band indicators
*Cool green and brass Airplane style dial
*Push-pull audio amplifier
*Controls are:
On/Off/Volume, Tone, Tuning and Band selector

Radio Face
Beautiful
Large Brass
Airplane Dial
Tuning Eye
Electronic "Eye" Tuning-
The more closed it is,
the closer the tuning.
Rebuilt chassis pictures

Since this was the first radio in our collection it became a learning experience.
The cabinet was in good shape, except a section approx 3x4 inches was missing from the top left side. We did a good job with filling the space and painting in a wood grain finish. Today no one would notice unless it was a very close inspection.
We did a general scratch touch-up with some staining wax, and applied furniture paste wax and polished it. There is a dime-size ding on the front and we began repairs, but it began to look worse so we just left as is.

The brass dial bezel was dark gray with tarnish, I though it was steel. I tried to get the curved glass out of it but ended up breaking the glass in the process. After polishing the bezel to a mirror finish I heat-molded a piece of clear plexiglas to replace the glass.

The original speaker cloth was nasty so we replaced it, and stapled the original inside.

I generally-cleaned the chassis , replaced the line cord and found it had a terrible buzzing-humming noise.

Truetone Chassis Truetone Chassis
Original Chassis Pictures
Original condition chassis Original condition chassis

The humm was fixed by replacing the power supply filters and the radio faintly received stations on all three bands. I then replaced two weak IF amplifier tubes and it worked a little better.

Not knowing what I was doing... I threw the IF transformers massively out of adjustment, causing intense feedback...even causing "lightning" in the two audio output tubes. It was quite disturbing to say the least! I didn't fix that for about 2 years when I got the correct equipment to calibrate the settings in the IF's. Since then the radio doesn't seem quite as sensitive as when I first powered her up.

Schematic Click to view the electronic schematic

At that point I had a good working, good looking console but the chassis was rusty and filthy. It looked 100 years old so I took on a new, bold project of cleaning it up...something I hadn't dreamed of before.
The idea was to remove all the top parts of the chassis, clean it with a wire brush and seal it up against rust. So I removed the power transformer, tubes, and everything else until I had this: Dirty chassis (Click the image for a bigger picture.)
After the chassis was cleaned it was gone over again with a metal cleaner, then I applied several coats of automotive wax. I found two days later the automotive wax is not a corrosion barrier. So I had to clean it all off again and I applied several coats of furniture wax. To this day the wax continues to prevent rust. This is a photo I snapped of the chassis right before I began reassembly: Clean Chassis (Click for the bigger pic)
Reassembly went smoothly. I was able to repaint the power transformer fresh black again and replace its rusty bolts.
I also disassembled the filthy tuning capacitor and was able to completely clean and adjust it.

The tuning eye didn't move its eye position and I replaced a bad resistor in its socket. I improved radio sensitivity by replacing all the old capacitors and fine-tuning the antenna and oscillator coils, as well as the IF's.

In the end we had a completely rebuilt, refurbished radio console.