Old Miller Welders

[jrd929]

I recently bought some used old Miller welders in a "fire sale" (by fire I mean quick). Some are 1970 and 1982 vintage Miller 250P AC/DC arc welders, others are 1982 Miller 3 phase welders, I don't know what the model is yet. My question is, did I buy a bunch of scrap or can these be used or sold, if so about how much? They all work well, so I hate to destroy good working equipment. I hear 3 phase is obsolete so now what? Thanks, Jon

[snoeproe]

I suspect those machines work just fine.
3 phase power is not obsolete, it's the preferred power used in industrial settings. It's not available in residential settings.