Not sure it is any note in particular. Ignoring the last comment, but here's a video of the issue as well.

https://youtube.com/shorts/iqXa2sbDFOY?feature=share

How can you play without touching the strings?

Thanks Loudthud, would I be correct in assuming those are for cleaning the signal? They all seem to near the inputs and outputs. And one is connected directly to the center lug of the pot.

Is the pitch of the hum between a Bb and a B?

Quote from: Loudthud on February 19, 2023, 12:26:26 AMIs the amp being plugged into a working, properly grounded outlet ? Try a different outlet. If that doesn't work, take it back to where you purchased it and see if it works there.

Yes I've also tried other outlets throughout the house and have the same issue. I'm going to take it to the shop where I bought my new guitar and see that everything works fine on one of their amps to rule out the guitar, and will probably take my amp with me. I requested a return on Amazon where I bought it but want to make sure it's not my guitars or outlets first. Thanks!

104Z is likely a 0.1uF cap. That's 10 followed by four zeros pico-Farads.

Is the amp being plugged into a working, properly grounded outlet ? Try a different outlet. If that doesn't work, take it back to where you purchased it and see if it works there.

BTW, the schematic you made is really helpful "dmeek!" It helps me get some of what is going on. I've never done a schematic before and I only am this far... Still wondering about watt and volt values for the disk caps labeled 104Z, with a single same size disk that is labeled .05uF at the input jack.

I just started playing again after about a 20 year break. I bought a new Orange 35RT amp and plugged my old epiphone SG into it, and the amp makes a very loud buzzing/humming sound when I turn up the gain past 20%. I tried new cables as well without any change. It stops if I put my finger on the string or another metal part of the guitar. Thinking it was the old guitar, I went out and bought a new one, and the exact same thing happens.

Unfortunately I don't have any other amp to test on at home, but seems like the issue is with the amp. I'm thinking of returning it and exchanging for another one, but wondering if this has happened to someone else before. Thanks!

Quote from: g1 on February 17, 2023, 02:51:21 PMAre you making a parts list for the clone, or for the repair?
The fault should be located and replaced before any general part replacement.

Agreed, It was in a non working state, I believe due to a broken connection to the  pot center of first picture. Also I shorted a diode while probing and plugged in <arg!> 1N4003 is the diode, but again not sure about the power ratings I need for this little amp?