Amazing harmonica/guitar amp. 5 years ago Greg Heumann did all the mods on the amp.
That includes complete disassembly of the amp, cleaning and lubing the pots, cleaning and re-tensioning tube sockets, adding a 3-wire power cord, eliminating the "death cap", replacing the power filter supply capacitors, add a line out, adding a front panel reinforcement mod, and replacing a few other minor components that sometimes need it.
Works perfectly and never had a problem.