for most welding you are better off getting the bottom line Lincoln or Miller MIG unit, I have a friend who is a professional welder who has a HF inverter TIG at his house that he uses occaisionally, he says it is OK for what it is but what it is is a cheaply built scratch start DC only unit without much control or power, or arc stabilization, so you really need to know what you are doing to get a good weld with it. I have a Millermatic 140 and wanted a TIG to go with it, I almost bought the HF unit several times, but every time I looked at it I liked it less, so I saved up and got a Miller Diversion 180 to make sure I could do stainless and aluminum, that said most of my welding is still done with the MIG
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