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Posted by Glen Id [70.41.247.101] on Wednesday, July 06, 2011 at 10:54:07 :
In Reply to: Cool! posted by D Sherman [72.47.9.228] on Wednesday, July 06, 2011 at 00:46:59 :
Probably just DC, It looks like a big electric closes dryer element in a ventilated box with a mechanical switch for different amp ranges. If you hit a bump while welding it would resonate like the old re verbs that they sold for your AM radio in your 57 Plymouth.