Friedman Runt 20 hum?

itsme

Well-known member
Friedman Runt 20 started to hum. Like 60 cycle. Replaced all the tubes, but still there. Any ideas/suggestions?
 
Did your power source change? I always try plugging into different outlets, powerstrips, turn lights on/off, check the microwave... anything can cause that annoying hum. If you have a pedalboard, a culprit could be the power source being too close to a flanger or something like that. Good luck.
 
Waldo Nova":1u2n4s2a said:
Did your power source change? I always try plugging into different outlets, powerstrips, turn lights on/off, check the microwave... anything can cause that annoying hum. If you have a pedalboard, a culprit could be the power source being too close to a flanger or something like that. Good luck.

Nothing changed
 
RACKSYSTEMS":3tyo9tky said:
With nothing plugged into the loop or the input it hums?

Actually I had asked this question for a friend. He has since talked to Dave and his amp is on the way back to the shop. Apparently there was a bad batch of caps or something in the rungs that need to be fixed
 
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