Model 10 100V AC on the chassis!

I just picked up a model 10, which sounds amazing, and apart from the broken 902 which I hope to repair, I had a light but definite shock when I connected my metal jack out cable to the Moog.

So DVM in hand I measured 100V AC from any of the exposed jacks and the shield of my mixer cable. That can’t be normal can it!

It’s not the Moog. There is good continuity between the earth pin of the mains lead and the exposed jack sockets. It must be EVERYTHING else in my studio…