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Philco 41-221C chassis restoration
#7

Morzh;
The differential needs to be at least 15v. So I'm running it at 90. Voltage here is between 120 and 125. So at minimum 120 my differential is 30v. So it could go as low 115v and work. At 120v with a 30 volt differential and at 100ma dissapation would be 3 watts, so dissipation is somewhat less in this radio. If you didn't see it in the video description here is a link to the complete article. Though the chart does not show resistance value for 90v output it was easy to figure out.
https://w4npn.org/wp-content/uploads/202...-Choke.pdf

Ron S.


Messages In This Thread
RE: Philco 41-221C chassis restoration - by morzh - 05-01-2026, 08:49 AM
RE: Philco 41-221C chassis restoration - by morzh - 05-01-2026, 09:58 PM
RE: Philco 41-221C chassis restoration - by electricroo - 05-01-2026, 10:43 PM
RE: Philco 41-221C chassis restoration - by morzh - 05-02-2026, 09:54 AM
RE: Philco 41-221C chassis restoration - by morzh - 05-02-2026, 02:56 PM
RE: Philco 41-221C chassis restoration - by morzh - 05-04-2026, 10:20 AM
RE: Philco 41-221C chassis restoration - by morzh - 05-05-2026, 01:41 PM
RE: Philco 41-221C chassis restoration - by morzh - 05-06-2026, 10:06 AM
RE: Philco 41-221C chassis restoration - by morzh - 05-07-2026, 10:26 AM
RE: Philco 41-221C chassis restoration - by morzh - 05-07-2026, 01:32 PM
RE: Philco 41-221C chassis restoration - by Arran - 05-07-2026, 02:32 PM
RE: Philco 41-221C chassis restoration - by morzh - 05-09-2026, 09:48 PM
RE: Philco 41-221C chassis restoration - by morzh - 05-10-2026, 10:09 AM
RE: Philco 41-221C chassis restoration - by morzh - 05-10-2026, 12:22 PM
RE: Philco 41-221C chassis restoration - by morzh - 05-10-2026, 01:14 PM
RE: Philco 41-221C chassis restoration - by morzh - 05-10-2026, 06:36 PM
RE: Philco 41-221C chassis restoration - by morzh - 05-31-2026, 02:34 PM



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