Hobart Tigwave 250 no AC output

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I've got an old (mid 90's) Hobart Tigwave 250 at work that's giving me grief, I greatly prefer it over the prehistoric Miller we have, but it doesn't function with the selector handle in AC. I remember it used to work, then the whole machine quit. It was repaired and I only ever used it on DC. One day I set up to weld some aluminum, swithed it over to AC, and pretty much nothing happened. If I set it to stick and crank the amperage way up I can get a little arc out of it, but nothing else.Is there anything specifically that I should be checking? Have a operator's manual, but that's about it.Thanks for any help you can offer.Gary
Reply:There's a thread I started that might give you a few things to try:https://weldingweb.com/vbb/showthrea...98#post8747498Check out my bench vise website:  http://mivise.comMiller Syncrowave 250DXMillermatic 350P with XR AlumaProMiller Regency 200 with 22A feeder and Spoolmatic 3Hobart Champion EliteEverlast PowerTig 210EXT