Yeah teemuk the problem was obvious once I opened her up. This amp has had this problem for a while it seems. Instead of fixing the problem properly the previous owner decided to "tighten up" the filter caps by jamming a folded up piece of paper between them. I pulled the paper wedge and one of them started flopping around like a rag doll. I went ahead and re-soldered the caps and hit all the other joints I could get to, put her back together and now she's pumping out beautiful clean sound once again. Thanks for the input!