Ok, this is probably a stupid question, but I read a post on here somewhere that had a link to someone that made their own TIG welder using a car battery, an alternator and a 5hp motor. It said that it put out DC. There was no mention of any rectifier being used or anything, so I'm confused as to how it puts out DC. I thought alternators were AC, because otherwise it wouldn't charge the car battery. Am I missing something?
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