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Philco 37-670B
07-04-2018, 11:25 PM
If your tube tester has a headphone jack, it is for checking just these sorts of problems. With the headphones in, and the controls set properly, you should hear virtually nothing. A whooshing sound, or hiss means a gassy tube. If you tap the tube and it rings like a bell for a bit after the tap it is microphonic. If you tap it and it pops and crackles you probably have an internal short that the shorts test didn't catch.
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Messages In This Thread
Philco 37-670B - by Ron Ramirez - 09-27-2015, 04:40 PM
RE: Philco 37-670B - by sam - 09-27-2015, 05:16 PM
RE: Philco 37-670B - by Ron Ramirez - 10-08-2015, 02:24 PM
RE: Philco 37-670B - by Kenneth F. Besso Jr. - 10-08-2015, 07:30 PM
RE: Philco 37-670B - by KCMike - 10-08-2015, 07:37 PM
RE: Philco 37-670B - by Ron Ramirez - 10-09-2015, 09:06 PM
RE: Philco 37-670B - by klondike98 - 10-09-2015, 10:56 PM
RE: Philco 37-670B - by Nathan Slingerland - 10-10-2015, 12:07 AM
RE: Philco 37-670B - by TA Forbes - 10-10-2015, 07:21 AM
RE: Philco 37-670B - by sam - 10-10-2015, 11:21 AM
RE: Philco 37-670B - by TA Forbes - 10-10-2015, 06:15 PM
RE: Philco 37-670B - by Ron Ramirez - 10-10-2015, 07:34 PM
RE: Philco 37-670B - by morzh - 10-10-2015, 07:44 PM
RE: Philco 37-670B - by Radioroslyn - 10-10-2015, 07:54 PM
RE: Philco 37-670B - by Ron Ramirez - 10-10-2015, 08:08 PM
RE: Philco 37-670B - by Ron Ramirez - 09-03-2017, 09:39 PM
RE: Philco 37-670B - by morzh - 09-03-2017, 10:44 PM
RE: Philco 37-670B - by Ron Ramirez - 09-04-2017, 07:09 AM
RE: Philco 37-670B - by morzh - 09-04-2017, 07:35 AM
RE: Philco 37-670B - by Ron Ramirez - 09-04-2017, 08:21 AM
RE: Philco 37-670B - by Mondial - 09-04-2017, 08:56 AM
RE: Philco 37-670B - by Ron Ramirez - 09-04-2017, 02:48 PM
RE: Philco 37-670B - by Mondial - 09-04-2017, 07:32 PM
RE: Philco 37-670B - by Ron Ramirez - 09-04-2017, 08:48 PM
RE: Philco 37-670B - by Ron Ramirez - 07-02-2018, 08:55 PM
RE: Philco 37-670B - by Brad Winder - 07-02-2018, 09:56 PM
RE: Philco 37-670B - by morzh - 07-02-2018, 09:59 PM
RE: Philco 37-670B - by Kenradio - 07-02-2018, 11:56 PM
RE: Philco 37-670B - by Ron Ramirez - 07-03-2018, 08:53 PM
RE: Philco 37-670B - by Ron Ramirez - 07-04-2018, 09:06 PM
RE: Philco 37-670B - by Ron Ramirez - 07-04-2018, 09:10 PM
RE: Philco 37-670B - by Ron Ramirez - 07-04-2018, 09:16 PM
RE: Philco 37-670B - by Ron Ramirez - 07-04-2018, 09:19 PM
RE: Philco 37-670B - by Ron Ramirez - 07-04-2018, 09:23 PM
RE: Philco 37-670B - by NostalgiaRadioTime - 07-04-2018, 10:22 PM
RE: Philco 37-670B - by mikethedruid - 07-04-2018, 11:25 PM
RE: Philco 37-670B - by NostalgiaRadioTime - 07-04-2018, 11:51 PM
RE: Philco 37-670B - by Ron Ramirez - 07-05-2018, 08:53 AM
RE: Philco 37-670B - by WyTex - 07-05-2018, 09:17 AM
RE: Philco 37-670B - by Ron Ramirez - 07-05-2018, 09:39 AM
RE: Philco 37-670B - by GarySP - 07-05-2018, 10:03 AM
RE: Philco 37-670B - by Nathan Slingerland - 07-05-2018, 10:11 AM
RE: Philco 37-670B - by Ron Ramirez - 07-05-2018, 11:50 AM
RE: Philco 37-670B - by Nathan Slingerland - 07-05-2018, 12:00 PM
RE: Philco 37-670B - by Arran - 07-11-2018, 05:04 PM
RE: Philco 37-670B - by morzh - 07-11-2018, 05:36 PM
RE: Philco 37-670B - by Ron Ramirez - 07-11-2018, 06:13 PM
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