Philco 40-140 Field Coil Replacement

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Philco 40-140 Field Coil Replacement

Arran
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Posts: 4,627
Threads: 51
Joined: Sep 2008
City: Sandwick, BC, CA

#7

09-07-2012, 09:38 PM

On a smaller AC set like this you can use the Pi filter trick with a wire wound resistor, however I would not recommend it for a higher tube count set with 8 or more tubes. The reason being is that in a larger tube count radio the B+ current draw will be higher so if you use a resistor the filter caps will discharge more resulting in a lower B+ voltage.
Regards
Arran

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Philco 40-140 Field Coil Replacement - by radiola - 09-04-2012, 11:21 PM

RE: Philco 40-140 Field Coil Replacement - by TA Forbes - 09-05-2012, 01:50 AM

RE: Philco 40-140 Field Coil Replacement - by radiola - 09-06-2012, 12:14 AM

RE: Philco 40-140 Field Coil Replacement - by codefox1 - 09-06-2012, 01:09 AM

RE: Philco 40-140 Field Coil Replacement - by TA Forbes - 09-06-2012, 11:57 AM

RE: Philco 40-140 Field Coil Replacement - by jerryhawthorne - 09-06-2012, 06:26 PM

RE: Philco 40-140 Field Coil Replacement - by Arran - 09-07-2012, 09:38 PM

RE: Philco 40-140 Field Coil Replacement - by jerryhawthorne - 09-15-2012, 07:08 PM

RE: Philco 40-140 Field Coil Replacement - by Arran - 09-17-2012, 06:33 PM

RE: Philco 40-140 Field Coil Replacement - by jerryhawthorne - 09-17-2012, 07:15 PM

RE: Philco 40-140 Field Coil Replacement - by TA Forbes - 09-17-2012, 09:17 PM

RE: Philco 40-140 Field Coil Replacement - by jerryhawthorne - 09-19-2012, 07:46 PM

RE: Philco 40-140 Field Coil Replacement - by TA Forbes - 09-19-2012, 08:03 PM

RE: Philco 40-140 Field Coil Replacement - by jerryhawthorne - 09-22-2012, 05:53 PM

RE: Philco 40-140 Field Coil Replacement - by codefox1 - 09-24-2012, 04:20 PM

RE: Philco 40-140 Field Coil Replacement - by jerryhawthorne - 09-24-2012, 05:01 PM

RE: Philco 40-140 Field Coil Replacement - by Steve Davis - 09-24-2012, 05:25 PM

RE: Philco 40-140 Field Coil Replacement - by codefox1 - 09-24-2012, 05:30 PM

RE: Philco 40-140 Field Coil Replacement - by radiola - 10-02-2012, 09:18 PM

RE: Philco 40-140 Field Coil Replacement - by jerryhawthorne - 10-02-2012, 09:30 PM

RE: Philco 40-140 Field Coil Replacement - by radiola - 10-02-2012, 10:01 PM

RE: Philco 40-140 Field Coil Replacement - by Ron Ramirez - 10-03-2012, 04:46 AM

RE: Philco 40-140 Field Coil Replacement - by jerryhawthorne - 10-03-2012, 12:40 PM

RE: Philco 40-140 Field Coil Replacement - by Michael Dennis - 10-04-2012, 10:28 AM

RE: Philco 40-140 Field Coil Replacement - by radiola - 10-05-2012, 11:39 PM

RE: Philco 40-140 Field Coil Replacement - by jerryhawthorne - 10-06-2012, 02:39 PM

RE: Philco 40-140 Field Coil Replacement - by radiola - 10-07-2012, 01:05 PM

RE: Philco 40-140 Field Coil Replacement - by morzh - 10-07-2012, 02:59 PM

RE: Philco 40-140 Field Coil Replacement - by jerryhawthorne - 10-07-2012, 06:03 PM

RE: Philco 40-140 Field Coil Replacement - by radiola - 10-07-2012, 08:19 PM

RE: Philco 40-140 Field Coil Replacement - by jerryhawthorne - 10-07-2012, 10:52 PM

RE: Philco 40-140 Field Coil Replacement - by morzh - 10-08-2012, 11:06 AM

RE: Philco 40-140 Field Coil Replacement - by codefox1 - 10-08-2012, 06:59 PM

RE: Philco 40-140 Field Coil Replacement - by jerryhawthorne - 10-08-2012, 07:54 PM

RE: Philco 40-140 Field Coil Replacement - by radiola - 10-10-2012, 09:22 PM

RE: Philco 40-140 Field Coil Replacement - by radiola - 10-11-2012, 09:49 PM

RE: Philco 40-140 Field Coil Replacement - by jerryhawthorne - 10-11-2012, 11:01 PM

RE: Philco 40-140 Field Coil Replacement - by radiola - 10-11-2012, 11:10 PM

RE: Philco 40-140 Field Coil Replacement - by jerryhawthorne - 10-12-2012, 12:38 AM

RE: Philco 40-140 Field Coil Replacement - by Ron Ramirez - 10-12-2012, 04:29 AM

RE: Philco 40-140 Field Coil Replacement - by radiola - 10-12-2012, 12:49 PM

RE: Philco 40-140 Field Coil Replacement - by radiola - 10-19-2012, 12:21 AM

RE: Philco 40-140 Field Coil Replacement - by codefox1 - 10-19-2012, 12:29 PM

RE: Philco 40-140 Field Coil Replacement - by Ron Ramirez - 10-19-2012, 05:39 PM

RE: Philco 40-140 Field Coil Replacement - by morzh - 10-19-2012, 07:29 PM

RE: Philco 40-140 Field Coil Replacement - by radiola - 10-20-2012, 02:21 AM

RE: Philco 40-140 Field Coil Replacement - by radiola - 01-31-2013, 02:44 PM

RE: Philco 40-140 Field Coil Replacement - by Ron Ramirez - 01-31-2013, 04:41 PM

RE: Philco 40-140 Field Coil Replacement - by radiola - 01-31-2013, 10:37 PM

RE: Philco 40-140 Field Coil Replacement - by Ron Ramirez - 02-01-2013, 05:07 AM

RE: Philco 40-140 Field Coil Replacement - by radiola - 02-01-2013, 05:57 AM

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