On Mon, 12 Sep 2005 17:43:52 -0700, "Richard W."
wrote:


I passed up a real nice older airco tig welder because I wasn't sure if I
could run it with my rotary phase converter. I have a miller double roller
wire feed unit that would have fit on it perfect. Next time I won't let it
get away.

Old copper-iron (not inverter type) TIG machines draw significantly
more current (at given amperage rating) than MIG machines do.
I think you'd need at least 20 HP worth of idler to run a TIG at 250
amps.