I found a 10-amp Powerstat “variac” autotransformer on craigslist. I’m going to put it in between an isolation transformer and a switched rectifier to make a AC/DC etching rig. Or maybe I’ll get into tube amps.
Here’s a good page on variacs: http://www.nmr.mgh.harvard.edu/~reese/VariacPage/
edit: had to recreate info that disappeared on initial posting
