I'm not sure if this is a ground loop or just the 120hz rectified noise making it into my preamp, but either way it makes it all the way out to my amp, with voltage amplification of course.
And I know for sure this is due to my preamp and not the amp because when I hook up another source to my amp, all I get is high frequency white noise at the output, no 120hz noise like I have attached.
I have attached my setup and schematics/layout. Anyone care of help me solve this issue? I know my wiring inside the preamp is a mess, but this couldn't possibly have anything to do with it right?
And I know for sure this is due to my preamp and not the amp because when I hook up another source to my amp, all I get is high frequency white noise at the output, no 120hz noise like I have attached.
I have attached my setup and schematics/layout. Anyone care of help me solve this issue? I know my wiring inside the preamp is a mess, but this couldn't possibly have anything to do with it right?