Last night's gig was in a small room so I took my Super Champ. During our second set, as I started to push the amp more- master on about 6 1/2- 7, lead volume on about 5 with the gain on about 6, I started to notice a degragation with the amp's headroom. It became pretty squishy-sounding (kind of cool, actually) and wasn't cutting through the mix as had been the case earlier and at previous gigs. By the third set, I noticed that the pilot light was dim and when we finished out the performance the on/off switch was pretty hot when I turned it off. I had good NOS tubes in the amp- hopefully they're still good. Also, I power all of my gear with a Furrman AR 15 II regulator. I'm thinking that one of the transformers has issues as maybe this was the result of insufficient voltage within the amp. This happened once before some time back and I thought that it was attributed it to the wall voltage. "Short" of having it on the bench- can anyone offer some opinions as to whether this may be the case or any other theories? Thanks.