RD-10: the Mysterious drum machine

Published on Oct 19, 2015 organfairy

"Can anybody tell me what this is?

I bought it some years ago in a second hand shop - one of those that has the entire repertoire from valuable antiques to worthless junk. They thought this drum machine belonged in the latter category. So I got it for next to nothing.

There was nothing defective in it. But I did modify it a little because it had a weird power plug that was impossible to find and the AC power was connected through an internal transformer. I don't know why but it could be something with ground loops if other things are connected to the same power supply. Who knows.

I don't know who made it. There is no brand tag on it or anything written on the circuit diagram. The only thing written is the model number which is RD-10.

The mysterious drum machine makes the rhythms in this video. The other noises comes from the Elka organ X-1000."