What can cause ground loops?

[romanianreaper]

Literally just went thru this…it was my pickup. I bumped it a little and it’s fine now. Hopefully I’ll get to fix it for real soon

Try a different guitar and see. I went thru the loop and a few other things. Once I figured it’s the guitar I was worried bad microphonic pickup. Best I can tell it’s a slightly bad connection with the bridge HB

I almost bought a fancy power strip and such to get rid of it

Yeah does it eith all of mine unfortunately

 

[romanianreaper]

a noisy pedal/power supply or dirty power to the amp was the first thing that came to mind based on the description, or like some appliance sharing the circuit.

you run an extension cord from an outlet somewhere else in the house to just the amp / no pedalboard, and process of elimination.
are you plugging your amp and pedalboard power supply(s) into the same multi-outlet, etc?
bad tube? i've had rumbly wind type noise from a bad 12ax7 recently.

Great idea!!

 

[romanianreaper]

I plugged the patch cable into the effects loop and sounds like I still had the noise there. It didn't have the same level of noise but that is most likely due to not being plugged into all of those pedals. I think it is most likely a bad solder somewhere which maybe one day I'll get to investigating. The noise is manageable but is there and I'm sure will continue to be a pain in the butt.