I have a MKB-300 Midi contoller keyboard that does not have a power cord. There are no specs on the back of the keyboard, and I don't have a book either. Does anyone know if there was a specific type of cable/power supply that came with the original? The power hookup on the back is square and has two prongs. I am going to keep searching on line, but from what i can tell, this thing looks like it was from '84-'86 and there is not alot of info on it. I would go down to radioshack, but the last time they helped me with a power adapter, they smoked my pignose amp right before my eyes. thanks.