There are people here in the uk building those things and using our 240v supply for them, really dodgy.
I'm fairy sure the thermatool I was thinking of was a electrode type, as it was used to remove broken studs etc.
The same place had cloos welding robots, and the weld sets were high frequency switchers and had sprague capacitors in them, I procured a couple and connected them to a crappy SIP mig welder I used to have, which just had a rectifier - no smoothing, and it was definately not so crappy afterwards.
Last edited by dr pepper; 10-14-2009 at 11:47 PM.
Build it, bodge it, but dont buy it.