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Goes Dead, Philco 45
Mondial
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#34

09-13-2013, 06:57 PM
If you have audio before the pop, but don't get a hum after when touching the center of the volume control, then the problem seems confined to the audio stages. My guess would be resistors 36 or 37, which are the plate resistors of the 75 tube. If one of these 70K resistors opens as it warms up, it could be the cause of your problems.

Check the plate voltage of the 75 triode section before and after the pop. If you lose plate voltage then one of the reistors is opening and that is the cause.
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Messages In This Thread
Goes Dead, Philco 45 - by marty - 09-11-2013, 12:38 PM
RE: Goes Dead, Philco 45 - by codefox1 - 09-11-2013, 12:54 PM
RE: Goes Dead, Philco 45 - by marty - 09-11-2013, 01:06 PM
RE: Goes Dead, Philco 45 - by morzh - 09-11-2013, 01:47 PM
RE: Goes Dead, Philco 45 - by marty - 09-11-2013, 02:09 PM
RE: Goes Dead, Philco 45 - by Warren - 09-11-2013, 02:52 PM
RE: Goes Dead, Philco 45 - by morzh - 09-11-2013, 02:59 PM
RE: Goes Dead, Philco 45 - by marty - 09-11-2013, 03:29 PM
RE: Goes Dead, Philco 45 - by marty - 09-11-2013, 04:22 PM
RE: Goes Dead, Philco 45 - by marty - 09-11-2013, 05:05 PM
RE: Goes Dead, Philco 45 - by marty - 09-11-2013, 06:28 PM
RE: Goes Dead, Philco 45 - by morzh - 09-11-2013, 07:50 PM
RE: Goes Dead, Philco 45 - by jerryhawthorne - 09-11-2013, 07:53 PM
RE: Goes Dead, Philco 45 - by BrendaAnnD - 09-11-2013, 08:10 PM
RE: Goes Dead, Philco 45 - by jerryhawthorne - 09-11-2013, 08:31 PM
RE: Goes Dead, Philco 45 - by morzh - 09-11-2013, 08:50 PM
RE: Goes Dead, Philco 45 - by marty - 09-11-2013, 10:23 PM
RE: Goes Dead, Philco 45 - by jerryhawthorne - 09-11-2013, 10:55 PM
RE: Goes Dead, Philco 45 - by marty - 09-11-2013, 11:06 PM
RE: Goes Dead, Philco 45 - by morzh - 09-12-2013, 09:28 AM
RE: Goes Dead, Philco 45 - by marty - 09-13-2013, 11:56 AM
RE: Goes Dead, Philco 45 - by BrendaAnnD - 09-13-2013, 12:17 PM
RE: Goes Dead, Philco 45 - by marty - 09-13-2013, 12:27 PM
RE: Goes Dead, Philco 45 - by morzh - 09-13-2013, 01:59 PM
RE: Goes Dead, Philco 45 - by marty - 09-13-2013, 02:04 PM
RE: Goes Dead, Philco 45 - by jerryhawthorne - 09-13-2013, 03:06 PM
RE: Goes Dead, Philco 45 - by marty - 09-13-2013, 03:18 PM
RE: Goes Dead, Philco 45 - by jerryhawthorne - 09-13-2013, 03:53 PM
RE: Goes Dead, Philco 45 - by morzh - 09-13-2013, 03:59 PM
RE: Goes Dead, Philco 45 - by BrendaAnnD - 09-13-2013, 05:29 PM
RE: Goes Dead, Philco 45 - by marty - 09-13-2013, 06:12 PM
RE: Goes Dead, Philco 45 - by jerryhawthorne - 09-13-2013, 06:43 PM
RE: Goes Dead, Philco 45 - by marty - 09-13-2013, 06:56 PM
RE: Goes Dead, Philco 45 - by Mondial - 09-13-2013, 06:57 PM
RE: Goes Dead, Philco 45 - by marty - 09-13-2013, 07:04 PM
RE: Goes Dead, Philco 45 - by Radioroslyn - 09-13-2013, 07:31 PM
RE: Goes Dead, Philco 45 - by marty - 09-13-2013, 07:35 PM
RE: Goes Dead, Philco 45 - by marty - 09-13-2013, 07:39 PM
RE: Goes Dead, Philco 45 - by marty - 09-13-2013, 07:52 PM
RE: Goes Dead, Philco 45 - by jerryhawthorne - 09-13-2013, 07:57 PM
RE: Goes Dead, Philco 45 - by marty - 09-13-2013, 08:04 PM
RE: Goes Dead, Philco 45 - by Mondial - 09-13-2013, 08:10 PM
RE: Goes Dead, Philco 45 - by jerryhawthorne - 09-13-2013, 08:12 PM
RE: Goes Dead, Philco 45 - by jerryhawthorne - 09-13-2013, 08:19 PM
RE: Goes Dead, Philco 45 - by marty - 09-13-2013, 08:23 PM
RE: Goes Dead, Philco 45 - by Radioroslyn - 09-13-2013, 08:32 PM
RE: Goes Dead, Philco 45 - by BrendaAnnD - 09-13-2013, 08:41 PM
RE: Goes Dead, Philco 45 - by marty - 09-13-2013, 08:48 PM
RE: Goes Dead, Philco 45 - by BrendaAnnD - 09-13-2013, 08:56 PM
RE: Goes Dead, Philco 45 - by marty - 09-13-2013, 09:17 PM
RE: Goes Dead, Philco 45 - by marty - 09-13-2013, 10:47 PM
RE: Goes Dead, Philco 45 - by jerryhawthorne - 09-13-2013, 11:04 PM
RE: Goes Dead, Philco 45 - by Radioroslyn - 09-14-2013, 07:01 AM
RE: Goes Dead, Philco 45 - by marty - 09-14-2013, 09:14 AM
RE: Goes Dead, Philco 45 - by Mondial - 09-14-2013, 09:23 AM
RE: Goes Dead, Philco 45 - by marty - 09-14-2013, 09:42 AM
RE: Goes Dead, Philco 45 - by Radioroslyn - 09-14-2013, 07:24 PM



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