1938 Airline Model 62-425
This is 1938 Airline Standard Broadcast AM radio sold by Montgomery Ward. It is
a 5 tube superheterodyne radio.
When recieved, the cabinet had several places where the veneer was missing. Before
I tried to play it, I removed the chassis to inspect it. I discovered the wires on
the filter capacitor (which had been replaced) had rotten insulation. In addition,
the capacitor was not attached and just flopped around. I replaced the capacitor and
the radio operated OK but seemed not to be optimum. Upon further inspection, someone
had shorted out the bias multisection resistor. I removed the short and the audio
was severely distorted and the bias on the grid was not correct. I replaced the
capacitor that couples the audio from the plate of the detector tube to the grid of the
output tube and the radio played loudly with no distortion. Apparently someone
compensated for the shorted capacitor by adjusting the bias. Replacing the capacitor
like I did would have much simpler. This radio is quite sensitive.
I repaired the missing veneer, stripped off the old varnish, restained the wood,
and finished the wood with tung oil. The finished result is the picture above.
Tube Compliment |
| Ballast |
Rectifier |
RF |
Osc |
Osc/Mix |
IF |
Det/AVC |
1st Audio |
Audio Output |
Tuning Eye |
Rider's Manual Page # |
| N/A |
5Y3 or 5Z4 |
N/A |
N/A |
6A7 |
78 |
75 |
N/A |
41 |
N/A |
9-57 |
Below is a picture of the radio when received. Note the missing veneer.
Below is a pciture of the rear of the radio.
