Vintage Synth Repair

I don't think the current "Simmons" has anything to do with the old
"Simmons"; I believe just the brand name was purchased.

There is a yahoo group for "old" Simmons instruments; perhaps you'll find
some help there?

And lastly I also have a Simmons SDE; I just don't know where it is right
now. But if everything else fails we could probably crosscheck the power
supply. It's a 230V model, though.