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V4 Hum Balance

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V4 Hum Balance
AEB-1 Offline
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Posts: 18
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Joined: Jun 2014
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#1
02-13-2016, 01:54 PM
I have an early 70s V4 that has been recapped and re-tubed. It plays awesome but with no input and the volume all the way down it has a hum (filament?) that I can get rid of with the hum balance pot. But then if I turn the volume up (no inputs) it hums loudly. I can cancel this by readjusting the hum balance but then with the volume turned back down it hums again.
I've tried multiple combinations of tubes. Currently using JJ-12AX7a, 12dw7 and NOS USA 12au7. Any ideas?
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Messages In This Thread
V4 Hum Balance - by AEB-1 - 02-13-2016, 01:54 PM
RE: V4 Hum Balance - by Hangman - 02-13-2016, 10:28 PM
RE: V4 Hum Balance - by AEB-1 - 02-15-2016, 08:05 AM
RE: V4 Hum Balance - by Hangman - 02-15-2016, 01:17 PM
RE: V4 Hum Balance - by AEB-1 - 02-16-2016, 06:25 AM
RE: V4 Hum Balance - by Liquids - 02-16-2016, 02:31 PM
RE: V4 Hum Balance - by Hangman - 02-17-2016, 06:14 PM
RE: V4 Hum Balance - by AEB-1 - 02-20-2016, 09:10 AM
RE: V4 Hum Balance - by Hangman - 02-21-2016, 11:54 AM
RE: V4 Hum Balance - by AEB-1 - 02-28-2016, 08:53 PM

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