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Tool Talk Discussion Board

Re: I think I need a new welder


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Posted by Stan in Oly, WA on July 05, 2013 at 10:58:43 from (174.31.201.133):

In Reply to: Re: I think I need a new welder posted by Greg 2N (TX) on July 04, 2013 at 06:53:07:

Greg,

Why do you say that aluminum windings would have really high resistance? Aluminum has the 4th least resistance of any metal (silver, copper, gold, aluminum, in that order). It was used for house wiring in the mid to late 20th century (that use was ended for problems other than its efficiency), and it is currently much more common than copper for feeder lines in residential and light commercial installations (larger installations than that I don't know).

The Lincoln Electric representative/historian who told me that Lincoln 225 buzz boxes have never been manufactured with copper windings on the transformer, said that some Idealarcs were copper and some were aluminum but that I would never be able to notice the difference. My guess is that it's a status kind of thing, as it is with most consumer products: If someone knows there's a difference, then they swear that they can detect the difference, but blind comparisons usually demonstrate that they can't. Well conducted tests have shown that people who won't drink any other vodka but Grey Goose (or any other high priced brand) are consistently unable to pick it out of a group of six brands---including really cheap ones---in blind taste testing.

Stan


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