Hey guys, I've got an issue with my RG7321 that I just can't seem to solve.
Basically, I'm getting a lot of hum whenever I'm not touching the strings. Put my hand on the strings - the problem goes away.
My first thought was that the strings / bridge aren't properly grounded, but... they are. I plugged in a cable and touched one of the strings to the jack sleeve with a continuity tester, and there is continuity.
Wondering if the problem was somewhere else in the circuit, I removed all of the electronics and connected everything as simply as possible:
Basically, all that's left is pickup hot / output hot are connected, and bridge ground / pickup ground / output ground are connected. I went as far as to remove all the strings but one, and it still happens - the string is connected to ground, but putting my hand on it kills a ton of buzz.
I must be missing something obvious here. Anyone have any idea?
(oh, and the problem isn't with the cable or the amp, because none of my other guitars have this problem)
Ok, after a few more hours of Googling and playing around with the wiring, I think I've figured this out. For the benefit of anyone who makes the same mistake as me:
I had the entirely wrong idea about the purpose of the bridge ground. I thought it was so that guitar can ground to your body, but it's actually the complete opposite - it's so your body can ground to the guitar.
So actually everything that was happening made complete sense. When I wasn't touching the strings, my body was radiating all kinds of noise, which caused the hum. When I touched the strings, my body was grounded through the guitar, killing the noise. The string / bridge ground was working as intended the entire time.
The actual problem turned out to be a shielding problem, specifically that my cavity shielding wasn't connected to ground, reducing its effectiveness. Once I properly grounded the shielding, the problem was drastically reduced. It's still a bit worse than my other guitars, but I figure I'll redo the shielding paint (it is, after all, my cheapest guitar, and the factory probably did a crappy job of shielding it) and that should fix the problem for good.