please email me at if you have any suggestions.here is
the problem, i bought a couple of organ amps that had been converted to
audio amps, the caps, resistors etc had been replaced the amp used 4 5881
tubes , 2 6sl7 tubes and 2 5u4 tubes , the previous owner added a volume
control, the problem is at no volume you hear static on the speakers , it
goes away with the volume turned up, if you tap the chassis you hear this on
the speakers, any suggestion to making the amps totally silent-?is it the
volume control or the input tubes?

Sounds like one of you small signal tubes is microphonic.
I would try some other 6sl7s to start with.

HYDEBEE wrote:

please email me at if you have any suggestions.here is
the problem, i bought a couple of organ amps that had been converted to
audio amps, the caps, resistors etc had been replaced the amp used 4 5881
tubes , 2 6sl7 tubes and 2 5u4 tubes , the previous owner added a volume
control, the problem is at no volume you hear static on the speakers , it
goes away with the volume turned up, if you tap the chassis you hear this on
the speakers, any suggestion to making the amps totally silent-?is it the
volume control or the input tubes?