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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, 10:56 AM
RE: Philco 84B Power Transformer - by Mondial - 04-18-2014, 12:37 PM
RE: Philco 84B Power Transformer - by vinzer - 04-18-2014, 01:31 PM
RE: Philco 84B Power Transformer - by bdi1976 - 04-18-2014, 06:14 PM
RE: Philco 84B Power Transformer - by morzh - 04-18-2014, 06:28 PM
RE: Philco 84B Power Transformer - by gregb - 04-18-2014, 06:30 PM
RE: Philco 84B Power Transformer - by bdi1976 - 04-18-2014, 07:54 PM
RE: Philco 84B Power Transformer - by bdi1976 - 04-18-2014, 07:56 PM
RE: Philco 84B Power Transformer - by gregb - 04-18-2014, 08:07 PM
RE: Philco 84B Power Transformer - by bdi1976 - 04-18-2014, 08:45 PM
RE: Philco 84B Power Transformer - by vinzer - 04-18-2014, 08:56 PM
RE: Philco 84B Power Transformer - by gregb - 04-18-2014, 09:44 PM
RE: Philco 84B Power Transformer - by bdi1976 - 04-18-2014, 11:20 PM
RE: Philco 84B Power Transformer - by gregb - 04-18-2014, 11:27 PM
RE: Philco 84B Power Transformer - by bdi1976 - 04-18-2014, 11:57 PM
RE: Philco 84B Power Transformer - by gregb - 04-19-2014, 12:23 AM
RE: Philco 84B Power Transformer - by bdi1976 - 04-19-2014, 09:33 AM
RE: Philco 84B Power Transformer - by bdi1976 - 04-19-2014, 09:37 AM
RE: Philco 84B Power Transformer - by bdi1976 - 04-19-2014, 09:43 AM
RE: Philco 84B Power Transformer - by gregb - 04-19-2014, 11:05 AM
RE: Philco 84B Power Transformer - by morzh - 04-19-2014, 12:09 PM
RE: Philco 84B Power Transformer - by Steve Davis - 04-19-2014, 12:19 PM
RE: Philco 84B Power Transformer - by gregb - 04-19-2014, 01:28 PM
RE: Philco 84B Power Transformer - by bdi1976 - 04-19-2014, 08:15 PM
RE: Philco 84B Power Transformer - by Steve Davis - 04-19-2014, 08:49 PM
RE: Philco 84B Power Transformer - by bdi1976 - 04-19-2014, 09:40 PM
RE: Philco 84B Power Transformer - by bdi1976 - 04-19-2014, 09:43 PM
RE: Philco 84B Power Transformer - by vinzer - 04-19-2014, 09:46 PM
RE: Philco 84B Power Transformer - by Steve Davis - 04-19-2014, 10:10 PM
RE: Philco 84B Power Transformer - by bdi1976 - 04-19-2014, 10:20 PM
RE: Philco 84B Power Transformer - by Steve Davis - 04-19-2014, 10:37 PM
RE: Philco 84B Power Transformer - by bdi1976 - 04-19-2014, 10:51 PM
RE: Philco 84B Power Transformer - by Steve Davis - 04-19-2014, 11:43 PM
RE: Philco 84B Power Transformer - by bdi1976 - 04-20-2014, 10:30 AM
RE: Philco 84B Power Transformer - by vinzer - 04-20-2014, 11:38 AM
RE: Philco 84B Power Transformer - by bdi1976 - 04-20-2014, 09:31 PM
RE: Philco 84B Power Transformer - by vinzer - 04-20-2014, 09:38 PM
RE: Philco 84B Power Transformer - by Mondial - 04-20-2014, 09:45 PM
RE: Philco 84B Power Transformer - by bdi1976 - 04-20-2014, 11:09 PM
RE: Philco 84B Power Transformer - by vinzer - 04-21-2014, 11:33 AM
RE: Philco 84B Power Transformer - by bdi1976 - 04-21-2014, 03:12 PM
RE: Philco 84B Power Transformer - by vinzer - 04-21-2014, 03:17 PM
RE: Philco 84B Power Transformer - by bdi1976 - 04-21-2014, 03:48 PM
RE: Philco 84B Power Transformer - by vinzer - 04-21-2014, 05:07 PM
RE: Philco 84B Power Transformer - by morzh - 04-21-2014, 08:17 PM
RE: Philco 84B Power Transformer - by bdi1976 - 04-21-2014, 10:50 PM
RE: Philco 84B Power Transformer - by bdi1976 - 04-22-2014, 08:52 AM
RE: Philco 84B Power Transformer - by vinzer - 04-22-2014, 11:55 AM
RE: Philco 84B Power Transformer - by morzh - 04-22-2014, 12:10 PM
RE: Philco 84B Power Transformer - by bdi1976 - 04-24-2014, 01:22 PM
RE: Philco 84B Power Transformer - by morzh - 04-24-2014, 01:47 PM
RE: Philco 84B Power Transformer - by bdi1976 - 04-24-2014, 07:21 PM
RE: Philco 84B Power Transformer - by vinzer - 04-24-2014, 07:52 PM
RE: Philco 84B Power Transformer - by Radioroslyn - 04-24-2014, 08:29 PM
RE: Philco 84B Power Transformer - by bdi1976 - 04-25-2014, 10:38 AM
RE: Philco 84B Power Transformer - by vinzer - 04-25-2014, 01:33 PM
RE: Philco 84B Power Transformer - by bdi1976 - 04-26-2014, 07:43 PM



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