Growing up quick...with a 38-690xx Pics added.

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Growing up quick...with a 38-690xx Pics added.

jerryhawthorne
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Posts: 1,562
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Joined: Nov 2008
City: Sedona, AZ/Placentia/CA

#39

05-22-2013, 05:17 PM

Hum not increased with the volume is typically in audio circuit after the volume control. Try pulling one tube at a time and see when it disappears. This will give you an idea as to where to look. If 60 cycle, probably filament associated (filament to cathode leakage). If 120 cycle probably B+ related.
Good luck, nice job so far!
Jerry

A friend in need is a pest! Bill Slee ca 1970.

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Messages In This Thread

Growing up quick...with a 38-690xx Pics added. - by badwaxcaps - 05-01-2012, 12:52 PM

RE: Growing up quick...with a 38-690xx - by codefox1 - 05-01-2012, 02:04 PM

RE: Growing up quick...with a 38-690xx - by badwaxcaps - 05-02-2012, 03:04 PM

RE: Growing up quick...with a 38-690xx - by Ron Ramirez - 05-02-2012, 04:24 PM

RE: Growing up quick...with a 38-690xx - by badwaxcaps - 05-02-2012, 05:16 PM

RE: Growing up quick...with a 38-690xx - by Ron Ramirez - 05-02-2012, 06:01 PM

RE: Growing up quick...with a 38-690xx - by badwaxcaps - 05-02-2012, 07:05 PM

RE: Growing up quick...with a 38-690xx - by badwaxcaps - 05-03-2012, 12:38 AM

RE: Growing up quick...with a 38-690xx Pics added. - by badwaxcaps - 05-03-2012, 12:46 AM

RE: Growing up quick...with a 38-690xx Pics added. - by badwaxcaps - 05-03-2012, 08:30 AM

RE: Growing up quick...with a 38-690xx Pics added. - by jerryhawthorne - 05-29-2012, 01:28 PM

RE: Growing up quick...with a 38-690xx Pics added. - by codefox1 - 05-29-2012, 02:05 PM

RE: Growing up quick...with a 38-690xx Pics added. - by Arran - 05-30-2012, 10:35 PM

RE: Growing up quick...with a 38-690xx Pics added. - by badwaxcaps - 05-31-2012, 11:51 PM

RE: Growing up quick...with a 38-690xx Pics added. - by TA Forbes - 05-31-2012, 11:55 PM

RE: Growing up quick...with a 38-690xx Pics added. - by jerryhawthorne - 06-01-2012, 12:34 AM

RE: Growing up quick...with a 38-690xx Pics added. - by badwaxcaps - 06-01-2012, 02:58 AM

RE: Growing up quick...with a 38-690xx Pics added. - by badwaxcaps - 08-26-2012, 01:33 PM

RE: Growing up quick...with a 38-690xx Pics added. - by Tom Hamilton - 08-29-2012, 02:38 AM

RE: Growing up quick...with a 38-690xx Pics added. - by Ron Ramirez - 10-27-2012, 03:45 AM

RE: Growing up quick...with a 38-690xx Pics added. - by DeckApe - 10-27-2012, 07:14 AM

RE: Growing up quick...with a 38-690xx Pics added. - by TA Forbes - 10-27-2012, 04:29 PM

RE: Growing up quick...with a 38-690xx Pics added. - by Gene Pederson - 10-28-2012, 07:53 PM

RE: Growing up quick...with a 38-690xx Pics added. - by badwaxcaps - 10-28-2012, 10:06 PM

RE: Growing up quick...with a 38-690xx Pics added. - by badwaxcaps - 11-17-2012, 01:17 AM

RE: Growing up quick...with a 38-690xx Pics added. - by codefox1 - 11-17-2012, 01:40 PM

RE: Growing up quick...with a 38-690xx Pics added. - by badwaxcaps - 11-17-2012, 05:58 PM

RE: Growing up quick...with a 38-690xx Pics added. - by 7estatdef - 12-13-2012, 07:34 AM

RE: Growing up quick...with a 38-690xx Pics added. - by jerryhawthorne - 12-19-2012, 10:45 PM

RE: Growing up quick...with a 38-690xx Pics added. - by codefox1 - 12-20-2012, 01:38 AM

RE: Growing up quick...with a 38-690xx Pics added. - by Gene Pederson - 01-07-2013, 11:38 AM

RE: Growing up quick...with a 38-690xx Pics added. - by badwaxcaps - 01-22-2013, 10:29 PM

RE: Growing up quick...with a 38-690xx Pics added. - by badwaxcaps - 02-23-2013, 03:32 PM

RE: Growing up quick...with a 38-690xx Pics added. - by Ron Ramirez - 02-23-2013, 03:43 PM

RE: Growing up quick...with a 38-690xx Pics added. - by badwaxcaps - 02-26-2013, 10:30 PM

RE: Growing up quick...with a 38-690xx Pics added. - by badwaxcaps - 03-05-2013, 07:08 PM

RE: Growing up quick...with a 38-690xx Pics added. - by BrendaAnnD - 03-05-2013, 07:32 PM

RE: Growing up quick...with a 38-690xx Pics added. - by badwaxcaps - 03-05-2013, 07:56 PM

RE: Growing up quick...with a 38-690xx Pics added. - by jerryhawthorne - 05-22-2013, 05:17 PM

RE: Growing up quick...with a 38-690xx Pics added. - by morzh - 05-22-2013, 11:29 PM

RE: Growing up quick...with a 38-690xx Pics added. - by badwaxcaps - 05-23-2013, 02:05 PM

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