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Ampeg J-12D
09-02-2021, 10:32 AM
Does anyone have any information on this amp.. I replaced all caps .. when i turn it on... no mic connected its quite .. no hum.. but when i plug in a mic i get a load hum when i turn up the volume its a metal case mic as soon as i touch the mic the hum comes.. any clue on why? grounding ??
Skip 
09-02-2021, 10:56 AM
When my pals were reading comic books I was down in the basement in my dad's workshop. Perusing his Sam's Photofoacts Vol 1-50 admiring the old set and trying to figure out what all those squiggly meant. Circa 1966 Now I think I've got! Terry
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