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Philco 70 output transformer
#22

Received the wire and rebuilt the oscillator coil using plastic blister pack, had it looking good, put back in - nothing, nada, nothing. Well thought it might be the plastic, so to it out and used scotch tape to rewind the RF coupling,  back in, still, nada, nothing. Took it out and did some research and ran across moisture. Baked it twice at 150 degrees 10 minutes each. Put it back in and heard the faint, tweaked, and it is back. Would not have believed it, but good advice as I had washed the former with water to get the grunge off thinking the wax would hold up, so coils don't like it. Doing the first RF coil next , DC leakage is no fun.

Oscillator tapped secondary and feedback done by hand with 30 AWG --


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Messages In This Thread
Philco 70 output transformer - by radio1 - 05-06-2020, 07:49 PM
RE: Philco 70 output transformer - by Radioroslyn - 05-06-2020, 08:32 PM
RE: Philco 70 output transformer - by radio1 - 05-06-2020, 08:40 PM
RE: Philco 70 output transformer - by klondike98 - 05-06-2020, 10:45 PM
RE: Philco 70 output transformer - by rfeenstra - 05-06-2020, 11:31 PM
RE: Philco 70 output transformer - by klondike98 - 05-06-2020, 11:56 PM
RE: Philco 70 output transformer - by radio1 - 05-07-2020, 05:45 AM
RE: Philco 70 output transformer - by Steve Davis - 05-07-2020, 08:58 AM
RE: Philco 70 output transformer - by radio1 - 05-07-2020, 09:59 AM
RE: Philco 70 output transformer - by radio1 - 05-07-2020, 11:20 AM
RE: Philco 70 output transformer - by morzh - 05-07-2020, 11:40 AM
RE: Philco 70 output transformer - by rfeenstra - 05-07-2020, 12:01 PM
RE: Philco 70 output transformer - by radio1 - 05-07-2020, 12:21 PM
RE: Philco 70 output transformer - by morzh - 05-07-2020, 12:46 PM
RE: Philco 70 output transformer - by rfeenstra - 05-07-2020, 12:56 PM
RE: Philco 70 output transformer - by radio1 - 05-07-2020, 07:34 PM
RE: Philco 70 output transformer - by morzh - 05-07-2020, 08:46 PM
RE: Philco 70 output transformer - by radio1 - 05-08-2020, 04:17 PM
RE: Philco 70 output transformer - by morzh - 05-08-2020, 04:51 PM
RE: Philco 70 output transformer - by radio1 - 05-18-2020, 06:52 PM
RE: Philco 70 output transformer - by radio1 - 05-19-2020, 08:26 PM
RE: Philco 70 output transformer - by radio1 - 05-27-2020, 08:19 PM
RE: Philco 70 output transformer - by radio1 - 06-06-2020, 08:22 PM



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