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Philco 620B Power Up Quirk
Phlogiston
Radio-Fixer-Upper
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Posts: 2,118
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#15

12-11-2020, 08:02 PM
One thing to add, is that the 27 (227) tube, Brobertson mentioned, was one of the first to have a cathode sleeve around the filament. These tubes often have high resistance shorts on the h/k. This will make noise. It can also cause hum. Often times the H/K problem will come and go as the tube heats up.
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(This post was last modified: 12-11-2020, 08:05 PM by Phlogiston.)
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Messages In This Thread
Philco 620B Power Up Quirk - by LarryFS - 11-25-2020, 01:25 PM
RE: Philco 620B Power Up Quirk - by morzh - 11-25-2020, 01:44 PM
RE: Philco 620B Power Up Quirk - by Bill Bacco - 11-25-2020, 01:48 PM
RE: Philco 620B Power Up Quirk - by LarryFS - 11-25-2020, 02:38 PM
RE: Philco 620B Power Up Quirk - by morzh - 11-25-2020, 03:01 PM
RE: Philco 620B Power Up Quirk - by LarryFS - 11-25-2020, 04:17 PM
RE: Philco 620B Power Up Quirk - by morzh - 11-25-2020, 05:00 PM
RE: Philco 620B Power Up Quirk - by radio1 - 11-26-2020, 09:24 PM
RE: Philco 620B Power Up Quirk - by LarryFS - 11-27-2020, 11:30 AM
RE: Philco 620B Power Up Quirk - by Scott D - 12-09-2020, 07:40 PM
RE: Philco 620B Power Up Quirk - by LarryFS - 12-09-2020, 08:57 PM
RE: Philco 620B Power Up Quirk - by 462ron - 12-10-2020, 09:45 AM
RE: Philco 620B Power Up Quirk - by LarryFS - 12-10-2020, 12:09 PM
RE: Philco 620B Power Up Quirk - by Scott D - 12-11-2020, 03:32 PM
RE: Philco 620B Power Up Quirk - by Phlogiston - 12-11-2020, 08:02 PM
RE: Philco 620B Power Up Quirk - by Arran - 12-11-2020, 11:33 PM
RE: Philco 620B Power Up Quirk - by Arran - 12-11-2020, 11:40 PM



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