I have this Peavey Classic 50 - early 90's, it was beat up when I got it, but it plays great. I really like this amp.
Two days ago, I plugged my new SG into it and after 2 minutes of playing picked up some sort of insane feedback. Turning the pot to zero didn't have any effect, silencing strings didn't have any effect, covering pickups no effect - the only thing that stopped it was switching the amp to standby. I checked it a couple more times with the same result.
I haven't tried it with any other guitar since, but I probably will tonight.
The path was, SG (bridge at maybe 2 or three on volume) > tuner > Badass Modified OD > amp ("normal" input). In the effects loop, MXR Carbon Copy > Boss RV6 Reverb.
I've used my G&L Legacy in this amp many times with absolutely no problems. This is the only other guitar I've plugged into it.
More details (settings, etc) to come. Any thoughts? Thanks guys.
Does the SG fare OK on your other amps?