Quote:
Originally Posted by Zeke
IDK exactly when Everlast and other imports left the MOSFET and entered the IGTB world but it was pretty much a universal move for all manufactures from what I learned following along. Apparently the IGTB units are much more reliable.
But, if you can change out MOSFET transistors you might be able to get a 'smokin' deal for an older welder.
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Mine is an IGBT unit, and yeah any modern TIG is now an IGBT inverter. The technology used to be expensive but now has become commonplace and super reliable in so that even very, very cheap Chinese TIGs can put out a load of current with cheap IGBT arrays and do it somewhat reliably with a moderate duty cycle.
It's actually those exact same cheap, mass produce IGBT packages that allows any modern electric car motor inverter to pump out ridiculous horsepower in the size of a milk carton.