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Philco 90 Stoped Working
#1

Some may recall, I restored this late version 90 (2 PP 47 output) last winter. It started about a month ago, the radio would stop playing. You could tune to the high end of the dial and it would come back on. It may work for several days before it would happen again. It began to get more and more frequent, finally getting to the point it would never play on the low end. Suspecting the oscillator, I confirmed using another radio. First I tried a couple of different 24A tubes in the oscillator position, one gave a slight improvement but, would still drop out. Tonight I pulled the chassis out and used a heat gun to heat the oscillator coil while it was still installed in the chassis. The radio now plays fine.   I plan to use the radio as long as it keeps working. If it happens again, I'm thinking about doing Ron's "super" mod. The late version 90 is pretty much the same as the 91 except it has 2.5 volt tubes so, I would have to use a 2A7 tube for the oscillator. Any thoughts?

Steve

M R Radios   C M Tubes


Messages In This Thread
Philco 90 Stoped Working - by Steve Davis - 03-26-2020, 10:25 PM
RE: Philco 90 Stoped Working - by morzh - 03-26-2020, 11:00 PM
RE: Philco 90 Stoped Working - by Ron Ramirez - 03-27-2020, 08:56 AM
RE: Philco 90 Stoped Working - by John Bartley - 03-27-2020, 09:37 AM
RE: Philco 90 Stoped Working - by Steve Davis - 03-27-2020, 04:27 PM



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