I've built a small 12v DC practice amp. Here is a simple issue, for someone other than me. i searched but did not find an answer. When i have nothing plugged into it, there is a loud hum, or buzz. when i plug in an instrument it goes down, not away. when I touch the instrument jack or the metal that all the pots and jacks are mounted to it pretty much goes away. So I know this has to be simple but this is my first amp and i am missing it.
Any help?
Mike
Any help?
Mike