1940 Zenith Model 4K515
This is a Zenith Model 4K515. This radio is Standard Broadcast only and is
a battery set requiring 1.5 Vdc for the filaments and 90 Vdc for the B+. This
radio has the distinctive "beehive" style. Because this radio runs on a
battery, there is no dial light. When the radio is on, a red indicator
mechanically linked to the on/off/volume control pops up in the lower
center of the dial and covers up the word "OFF" in the lower center of the dial.
When off, the red indicator disappears below the window.
You can see "OFF" in the picture in the lower center of the dial.
Battery connections are made through a 4-pin connector seen in the picture
of the back of this radio shown below.
Below is a picture of the front of the chassis.
Below is a picture of the rear of the chassis.
Below is a picture of the bottom of the chassis.
I made a power supply for this radio (shown below) and the radio works well
after replacing the audio output tube.
When received, the radio had no knobs. I purchased
reproduction knobs, modified them to extend the shaft, and they are shown on the radio
in the first picture. The original knobs would have had a slightly yellow color
(I have other Zenith radios with these style knobs as original and all have a yellow hue). These
reproduction knobs are white.
The extension shafts for the knobs made from brass tubing can be seen in the picture of the bottom of the chassis above.
They slide over the control shafts and into the hole on the back side of the reproduction knobs.
Tube Compliment |
| Ballast |
Rectifier |
RF |
Osc |
Osc/Mix |
IF |
Det/AVC |
1st Audio |
Audio Output |
Tuning Eye |
Rider's Manual Page # |
| N/A |
N/A |
N/A |
N/A |
1A7G |
1N5G |
1H5G |
N/A |
1C5G |
N/A |
12-2 |
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