I built up this little variac tool with isolation for the work bench from some stuff that was laying around. I got a 500w 115v variac with gear drive from a friend, and added a 115vac isolation transformer for working on some of those old AA5 tube radios that have a hot chassis. Power out pigtails are for isolated or non-isolated power. This is mostly helpful when bringing up some of the old vintage stuff that's been parked a long time. I could put it in an enclosure for safety, but where's the fun in that? :-) Here's some pics and a video...
