If the humming ONLY happens when a cable is plugged into the amp, the problem is in the cable or the guitar. Poor quality cables or wrong cables will result in hum. Defective wiring or connectors in the guitar OR having the guitar near a source of magnetic fields will result in hum. We cannot diagnose these possibilities remotely.
thanks. what I found it to be was, in the same outlet I had one of my effects plugged in, and after I unplugged the effect pedal the noise stopped. Could be my house wiring or the pedal, but it wasn't the amp as you stated. Just a matter of outside interference that had to be tracked down...
I have the same problem. Only when I plug in to it. And yes I usually have my pedal board plugged into the same outlet as the amp. I'll unplug it or try another outlet.
The problem with my Frontman is that both the input jacks are seemingly damaged I've deduced, since when I plug the guitar into my practice amp it works perfectly fine. Its not an issue with the cables I believe. I've heard copper wire could help with connectivity. should i cover the input jacks with copper wire?
No .. it doesnt come from the cable ! if you plugg just a jack without any cable in the connecteur, we have the same problem. Indeed the problem comes fro the last stage of the ampli .. all is ok from the jack entry ( J1ou J2) until operationel ampli TL072 ( U6-B) ..I’ve cnage the op-ampli and the problem is not solved.. If tou plug a jack in the « power in » jack ( J4) you disconnect all the preampli and just the last satge is connected to the HP.. THE PROBLEM IS ALREADY PRESENT.. the amps is cracking when the pream is disconected..The the problem is in the last stage of the ampli.. Then I ve changed the power transistror and driver : Q18-Q20 & Q19-Q21 ..the problem is already present .. Then I think the problem is in a chimical capacitor but I dont know witch one it is .. if somebody has a solution or a clue to look for tde defect , I’d be wery pleased for a help . please mail a clue or solution to mail at [email protected] thanks
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If you have single coil pickups with high gain, that would do it
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