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Philco model 87
#21

Are you measuring the voltage on the 26 tube from filament pin to filament pin or from filament pin to chassis ground?

Across the two pins should be 1.5 V AC, but from either filament pin to ground there will be a DC voltage of around 5 to 10 V.

If you were referring to using the 100 V rated caps as the filament bypass, I don't think its a problem. There is only the bias voltage across the caps to ground, which is less than 10 Vdc.


Messages In This Thread
Philco model 87 - by flatheadjr - 09-28-2016, 08:27 PM
RE: Philco model 87 - by flatheadjr - 01-11-2017, 08:24 PM
RE: Philco model 87 - by flatheadjr - 01-21-2017, 03:40 PM
RE: Philco model 87 - by Radioroslyn - 01-21-2017, 06:44 PM
RE: Philco model 87 - by Mondial - 01-21-2017, 08:34 PM
RE: Philco model 87 - by flatheadjr - 01-21-2017, 08:52 PM
RE: Philco model 87 - by Radioroslyn - 01-21-2017, 11:07 PM
RE: Philco model 87 - by flatheadjr - 01-21-2017, 11:30 PM
RE: Philco model 87 - by Radioroslyn - 01-22-2017, 06:10 AM
RE: Philco model 87 - by flatheadjr - 01-22-2017, 01:16 PM
RE: Philco model 87 - by Radioroslyn - 01-22-2017, 02:11 PM
RE: Philco model 87 - by flatheadjr - 01-22-2017, 02:48 PM
RE: Philco model 87 - by Radioroslyn - 01-23-2017, 12:25 AM
RE: Philco model 87 - by flatheadjr - 01-23-2017, 12:37 AM
RE: Philco model 87 - by Radioroslyn - 01-23-2017, 12:11 PM
RE: Philco model 77 - by Radioroslyn - 09-29-2016, 09:29 AM
RE: Philco model 77 - by flatheadjr - 09-29-2016, 11:17 AM
RE: Philco model 77 - by Arran - 10-01-2016, 04:00 AM
RE: Philco model 77 - by flatheadjr - 10-08-2016, 05:22 PM
RE: Philco model 77 - by Radioroslyn - 10-08-2016, 07:05 PM
RE: Philco model 77 - by flatheadjr - 10-12-2016, 08:31 PM
RE: Philco model 77 - by Radioroslyn - 10-12-2016, 09:35 PM
RE: Philco model 77 - by Radioroslyn - 10-17-2016, 07:05 PM
RE: Philco model 77 - by flatheadjr - 01-04-2017, 10:08 PM
RE: Philco model 77 - by Radioroslyn - 01-05-2017, 09:30 AM
RE: Philco model 77 - by flatheadjr - 01-05-2017, 08:46 PM
RE: Philco model 77 - by Arran - 01-09-2017, 03:02 AM
RE: Philco model 77 - by Radioroslyn - 01-09-2017, 10:42 AM
RE: Philco model 77 - by flatheadjr - 01-10-2017, 11:03 PM
RE: Philco model 77 - by Ron Ramirez - 01-11-2017, 12:20 PM
RE: Philco model 77 - by Radioroslyn - 01-11-2017, 08:03 AM



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