This unit came from a working organ my parents tried to give away 10 years ago prior to a move. I rescued the amp before the organ was sadly scrapped. As a ham operator who loves vintage gear, I had intended to convert it into a modulator for a low power AM transmitter, but now need to downsize. Might make a great foundation for a guitar amp, or whatever, parts even. Pretty good sized power transformer! As I said, it was working, but that was 10 years ago, so no guarantees. Not sure how strong the tubes are. It uses; 2/6L6's, 5U4, 6S4A, 6DN7 & OC2.