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Philco 84 continuation
#1

Hello Everyone,

I am once again back on trying to restore my Philco 84. I had stoped working on it for a few different reasons which hurt me because some of the knowledge I picked up on theory
went down the drain. Here's what I did am where I am at:

I replaced all the resistors except a wire wound 325 ohm which still measured at that value.
I replaced the bakelite capacitors and replaced the 8k & 4k electrolytic capacitors with singe 10k/10k electrolytic capacitor .
I added a S7 speaker from a Philco 60 because mine was to far gone to try and repair (I tried).

When I powered it up I just got noise out of the speaker with nothing really appearing different as I changed frequencies. I read that filter capacitors
sometimes cause this problem but electrolytics seem good and I made sure that the rivet on the 42 tube had a good ground which was completed by a 
previous owner.
I made continuity measurements on the coils and they seem in range. I know I should replace the 16k resistor with a higher wattage one.

Are there any suggestions on what I should do next on troubleshooting? I do have an oscilloscope and a older signal generator. What areas do you
think I should test. All the vacuum tubes are lit and tested fine on my tube tester. I have attached some pictures and the schematic.

Regards,
Bob


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Messages In This Thread
Philco 84 continuation - by Ctkid - 03-02-2026, 07:00 PM
RE: Philco 84 continuation - by radiorich - 03-02-2026, 08:28 PM
RE: Philco 84 continuation - by Ctkid - 03-02-2026, 08:46 PM
RE: Philco 84 continuation - by radiorich - 03-03-2026, 01:41 AM
RE: Philco 84 continuation - by dconant - 03-03-2026, 12:50 PM
RE: Philco 84 continuation - by Ctkid - 03-03-2026, 01:40 PM
RE: Philco 84 continuation - by Ctkid - 03-03-2026, 01:44 PM
RE: Philco 84 continuation - by dconant - 03-03-2026, 05:35 PM
RE: Philco 84 continuation - by klondike98 - 03-14-2026, 02:31 PM



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