I went to visit a friend to see if he had pulled out his dads old radios he was going to give me ( he hadn't) but he did give me an old bogen tube amp and a Klemt Echolette. the Klemt is a tape delay unit for guitar and voice. It has a bridge rectifier that says Semikron B300 C70. Not sure if its silicon or selenium. It's pretty tight quarters in there if it still works I would leave it if it was silicon. My big question is it's really dirty and dusty inside, A good candidate to hose it down except what about the motor? Can it stand being wet? Of course I would not attempt to energize till fully dry. I really don't wa
nt to tear the thing apart too much because of the fine wires inside the unit. I think I can change the caps without a whole lot of problems. Well made German unit but cramped and DIRTY. The dust is thick even in the motor. Break and electric motor cleaner?