Philco 635 Hum

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Philco 635 Hum

dconant
Senior Member

Posts: 553
Threads: 89
Joined: Jun 2022
City: Marion State, Province, Country: NY

#13

03-01-2026, 12:15 PM

Here is an update. I changed #22 to a two meg which made no difference. I then paralleled a 39 ohm resistor for the first section of #70 to make it 21 ohms. Made no difference but it did cure the high plate voltage on the 75 tube so now it is close to the 188 volts spec. Radio still plays well.

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Messages In This Thread

Philco 635 Hum - by dconant - 02-27-2026, 01:10 PM

RE: Philco 635 Hum - by dconant - 02-27-2026, 03:48 PM

RE: Philco 635 Hum - by RodB - 02-27-2026, 04:49 PM

RE: Philco 635 Hum - by dconant - 02-27-2026, 06:03 PM

RE: Philco 635 Hum - by dconant - 02-28-2026, 05:10 PM

RE: Philco 635 Hum - by morzh - 02-28-2026, 05:29 PM

RE: Philco 635 Hum - by RodB - 02-28-2026, 06:26 PM

RE: Philco 635 Hum - by dconant - 02-28-2026, 06:37 PM

RE: Philco 635 Hum - by morzh - 02-28-2026, 08:39 PM

RE: Philco 635 Hum - by morzh - 02-28-2026, 08:53 PM

RE: Philco 635 Hum - by RodB - 03-01-2026, 10:52 AM

RE: Philco 635 Hum - by dconant - 03-01-2026, 11:37 AM

RE: Philco 635 Hum - by dconant - 03-01-2026, 12:15 PM

RE: Philco 635 Hum - by morzh - 03-01-2026, 12:55 PM

RE: Philco 635 Hum - by dconant - 03-01-2026, 01:05 PM

RE: Philco 635 Hum - by morzh - 03-01-2026, 01:32 PM

RE: Philco 635 Hum - by RodB - 03-01-2026, 02:19 PM

RE: Philco 635 Hum - by morzh - 03-01-2026, 04:46 PM

RE: Philco 635 Hum - by morzh - 03-01-2026, 04:52 PM

RE: Philco 635 Hum - by dconant - 03-02-2026, 11:47 AM

RE: Philco 635 Hum - by RodB - 03-02-2026, 12:01 PM

RE: Philco 635 Hum - by morzh - 03-02-2026, 02:49 PM

RE: Philco 635 Hum - by dconant - 03-02-2026, 02:52 PM

RE: Philco 635 Hum - by morzh - 03-02-2026, 03:05 PM

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