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Philco 38-7CS
Chuck Schwark
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Posts: 1,703
Threads: 55
Joined: Sep 2005
City: Evanston, IL
#22

07-29-2014, 10:35 AM
With your 600A tester, do you use this trick I learned when testing?

Perform the normal Gm test and hold the button down, and then click the FIL voltage switch DOWN one click to slightly lower the filament voltage.

See if the Gm test only dips slightly. If it drifts down appreciably, then the tube is also marginal for emission on a high-mileage tube, when in a set that has slightly lower filament voltage.

Chuck
Chuck Schwark,
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Messages In This Thread
Philco 38-7CS - by Bob Andersen - 07-24-2014, 07:32 PM
RE: Philco 38-7CS - by Bob Andersen - 07-24-2014, 07:41 PM
RE: Philco 38-7CS - by Bob Andersen - 07-24-2014, 07:48 PM
RE: Philco 38-7CS - by Bob Andersen - 07-24-2014, 07:57 PM
RE: Philco 38-7CS - by Arran - 07-24-2014, 09:34 PM
RE: Philco 38-7CS - by Bob Andersen - 07-24-2014, 09:50 PM
RE: Philco 38-7CS - by codefox1 - 07-25-2014, 01:34 PM
RE: Philco 38-7CS - by Chuck Schwark - 07-25-2014, 01:46 PM
RE: Philco 38-7CS - by morzh - 07-25-2014, 01:47 PM
RE: Philco 38-7CS - by Bob Andersen - 07-25-2014, 04:24 PM
RE: Philco 38-7CS - by morzh - 07-25-2014, 05:02 PM
RE: Philco 38-7CS - by Arran - 07-26-2014, 12:06 AM
RE: Philco 38-7CS - by Bob Andersen - 07-27-2014, 03:35 PM
RE: Philco 38-7CS - by gregb - 07-27-2014, 11:13 PM
RE: Philco 38-7CS - by Bob Andersen - 07-27-2014, 11:28 PM
RE: Philco 38-7CS - by Bob Andersen - 07-28-2014, 04:16 PM
RE: Philco 38-7CS - by Mondial - 07-28-2014, 04:26 PM
RE: Philco 38-7CS - by Bob Andersen - 07-28-2014, 05:18 PM
RE: Philco 38-7CS - by Mondial - 07-28-2014, 05:36 PM
RE: Philco 38-7CS - by Bob Andersen - 07-28-2014, 06:51 PM
RE: Philco 38-7CS - by Bob Andersen - 07-28-2014, 10:29 PM
RE: Philco 38-7CS - by Chuck Schwark - 07-29-2014, 10:35 AM
RE: Philco 38-7CS - by morzh - 07-29-2014, 10:37 AM
RE: Philco 38-7CS - by Chuck Schwark - 07-29-2014, 10:42 AM
RE: Philco 38-7CS - by morzh - 07-29-2014, 11:02 AM
RE: Philco 38-7CS - by Warren - 07-29-2014, 01:59 PM
RE: Philco 38-7CS - by gregb - 07-29-2014, 03:16 PM
RE: Philco 38-7CS - by Bob Andersen - 07-29-2014, 03:31 PM
RE: Philco 38-7CS - by Bob Andersen - 08-03-2014, 02:06 PM
RE: Philco 38-7CS - by codefox1 - 08-03-2014, 04:29 PM



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