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City: Linn Creek, MO
No, go ahead and check the voltages, especially the plate voltages on the 24s and the 27. If there is no plate voltage on one of the 24s, there is an open winding in one of the RF transformers. If there is no plate voltage on the 27, the interstage transformer has an open primary winding (a common failure). If all the tubes light up, go on the assumption that they are good, at least good enough for the radio to work. You said the radio hums, that tells us the 71s and the 80 are working.
Steve
M R Radios C M Tubes
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RE: Philco Model 20 Lowboy - by Steve Davis - 05-06-2017, 11:01 PM
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