[codefox1]

Well, Suppose you have two big surplus 115 to 7.5 or whatever hefty surplus transformers and run 'tm back to back, you would get needed isolation, and then hookup your variac whether isolated or not, and do your testing. Yeah, well, I think the next stupid trick may be my last, so it takes me a little longer bench time to sort out the problem of the day. "Belt and suspenders, Gents, we want you here next year!"