Some of those orange caps look like they've been slowly dripping wax for decades. But when I took it into Don Jones (
Jones amps, back when he was in Topeka KS, http://www.jonesamplifiers.com/) he said they were still kicking. Don went through and made sure I wouldnt actually get electrocuted, and he tweaked a few things to make it more "guitar friendly". He kept saying "Its so simple, so basic" over and over as he was checking it out.