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Philco 84B Power Transformer
#13

Hey guys- The osc and antenna coils are OK. After rechecking all caps and resistors, I found a resistor that was 1K instead of 1M (my fault of course). After replacing, it started making sound...buzzing, which changes sound with tuning. I checked the voltages for the Output tube; all normal. The 77s seem to be a little low on voltages; Plate =69 (should be 100), screen=25 (should be 60), if I'm checking it correctly. The tube circuit still confuses me. I am probing Pin#1 (hot) with Pin#2 (for Plate, as per scheme), Pin#3 (for Screen as per scheme), etc, with DC voltage check? I checked the Rectifier using AC voltage since it is still AC at that point. Also, I cannot check the 77 caps at all because the speaker starts screaming at me if I touch either one. I appreciate all of your input. Thanks
bd


Messages In This Thread
Philco 84B Power Transformer - by bdi1976 - 04-18-2014, 09:56 AM
RE: Philco 84B Power Transformer - by Mondial - 04-18-2014, 11:37 AM
RE: Philco 84B Power Transformer - by vinzer - 04-18-2014, 12:31 PM
RE: Philco 84B Power Transformer - by bdi1976 - 04-18-2014, 05:14 PM
RE: Philco 84B Power Transformer - by morzh - 04-18-2014, 05:28 PM
RE: Philco 84B Power Transformer - by gregb - 04-18-2014, 05:30 PM
RE: Philco 84B Power Transformer - by bdi1976 - 04-18-2014, 06:54 PM
RE: Philco 84B Power Transformer - by bdi1976 - 04-18-2014, 06:56 PM
RE: Philco 84B Power Transformer - by gregb - 04-18-2014, 07:07 PM
RE: Philco 84B Power Transformer - by bdi1976 - 04-18-2014, 07:45 PM
RE: Philco 84B Power Transformer - by vinzer - 04-18-2014, 07:56 PM
RE: Philco 84B Power Transformer - by gregb - 04-18-2014, 08:44 PM
RE: Philco 84B Power Transformer - by bdi1976 - 04-18-2014, 10:20 PM
RE: Philco 84B Power Transformer - by gregb - 04-18-2014, 10:27 PM
RE: Philco 84B Power Transformer - by bdi1976 - 04-18-2014, 10:57 PM
RE: Philco 84B Power Transformer - by gregb - 04-18-2014, 11:23 PM
RE: Philco 84B Power Transformer - by bdi1976 - 04-19-2014, 08:33 AM
RE: Philco 84B Power Transformer - by bdi1976 - 04-19-2014, 08:37 AM
RE: Philco 84B Power Transformer - by bdi1976 - 04-19-2014, 08:43 AM
RE: Philco 84B Power Transformer - by gregb - 04-19-2014, 10:05 AM
RE: Philco 84B Power Transformer - by morzh - 04-19-2014, 11:09 AM
RE: Philco 84B Power Transformer - by Steve Davis - 04-19-2014, 11:19 AM
RE: Philco 84B Power Transformer - by gregb - 04-19-2014, 12:28 PM
RE: Philco 84B Power Transformer - by bdi1976 - 04-19-2014, 07:15 PM
RE: Philco 84B Power Transformer - by Steve Davis - 04-19-2014, 07:49 PM
RE: Philco 84B Power Transformer - by bdi1976 - 04-19-2014, 08:40 PM
RE: Philco 84B Power Transformer - by bdi1976 - 04-19-2014, 08:43 PM
RE: Philco 84B Power Transformer - by vinzer - 04-19-2014, 08:46 PM
RE: Philco 84B Power Transformer - by Steve Davis - 04-19-2014, 09:10 PM
RE: Philco 84B Power Transformer - by bdi1976 - 04-19-2014, 09:20 PM
RE: Philco 84B Power Transformer - by Steve Davis - 04-19-2014, 09:37 PM
RE: Philco 84B Power Transformer - by bdi1976 - 04-19-2014, 09:51 PM
RE: Philco 84B Power Transformer - by Steve Davis - 04-19-2014, 10:43 PM
RE: Philco 84B Power Transformer - by bdi1976 - 04-20-2014, 09:30 AM
RE: Philco 84B Power Transformer - by vinzer - 04-20-2014, 10:38 AM
RE: Philco 84B Power Transformer - by bdi1976 - 04-20-2014, 08:31 PM
RE: Philco 84B Power Transformer - by vinzer - 04-20-2014, 08:38 PM
RE: Philco 84B Power Transformer - by Mondial - 04-20-2014, 08:45 PM
RE: Philco 84B Power Transformer - by bdi1976 - 04-20-2014, 10:09 PM
RE: Philco 84B Power Transformer - by vinzer - 04-21-2014, 10:33 AM
RE: Philco 84B Power Transformer - by bdi1976 - 04-21-2014, 02:12 PM
RE: Philco 84B Power Transformer - by vinzer - 04-21-2014, 02:17 PM
RE: Philco 84B Power Transformer - by bdi1976 - 04-21-2014, 02:48 PM
RE: Philco 84B Power Transformer - by vinzer - 04-21-2014, 04:07 PM
RE: Philco 84B Power Transformer - by morzh - 04-21-2014, 07:17 PM
RE: Philco 84B Power Transformer - by bdi1976 - 04-21-2014, 09:50 PM
RE: Philco 84B Power Transformer - by bdi1976 - 04-22-2014, 07:52 AM
RE: Philco 84B Power Transformer - by vinzer - 04-22-2014, 10:55 AM
RE: Philco 84B Power Transformer - by morzh - 04-22-2014, 11:10 AM
RE: Philco 84B Power Transformer - by bdi1976 - 04-24-2014, 12:22 PM
RE: Philco 84B Power Transformer - by morzh - 04-24-2014, 12:47 PM
RE: Philco 84B Power Transformer - by bdi1976 - 04-24-2014, 06:21 PM
RE: Philco 84B Power Transformer - by vinzer - 04-24-2014, 06:52 PM
RE: Philco 84B Power Transformer - by Radioroslyn - 04-24-2014, 07:29 PM
RE: Philco 84B Power Transformer - by bdi1976 - 04-25-2014, 09:38 AM
RE: Philco 84B Power Transformer - by vinzer - 04-25-2014, 12:33 PM
RE: Philco 84B Power Transformer - by bdi1976 - 04-26-2014, 06:43 PM



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