I recently took the optigan apart this past week to clean the contact buttons and was able to solve the excessive hum problem. One of the black wires (from the power chord) has a metal loop that attaches right be the mechanism that spins the disk & holds the lamp. That lug was loose and it was hummi...

Thanks for the reply. Magically ( and maybe due to the mysterious inner-workings of these quirky instruments) the key clicking/popping went away on its own and and the hum is much less on the chord buttons? Maybe the cleaner was still wet in there when I was using it? I got a posted reply on the Opt...

Hi, I recently acquired one locally and same thing happened to mine. Only a few of the chord buttons worked when I got it...obviously dirty contacts on the chord buttons & tabs. Keyboard played just fine. I decided to take the lazy route and spray a bunch of contact cleaner on the chord buttons & 's...