So yesterday I was playing along to so shit, and the volume of my amp drastically dropped. Then about 10 seconds it went back to normal. I didn't really notice it at first as I usually jam out pretty loud and the music and my amp are usually at same volume. I thought maybe it was my cables which have been used and abused. So today I switched out the cables and it's doing it again. There is no pop sound or whatever. It's almost like a ghost is switching the attenuater from 1 wattage to the next and then back up again. But it's random. So I thought maybe it was my new Gibson, maybe a Pickup problem, so I plugged my Epi in and same thing. Like I said, no hums, no buzz, no pops. Just gets really quiet and than goes back to the regular volume it's supposed to be at.
Starting to think it's a tube issue and haven't turned the amp on since. So what do you guys think? Power tubes, or pre-amp tubes? Or something else?