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Old 07-18-2011, 05:25 PM
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If you want to do aluminum and have decent results you need a squarewave machine that has adjustable ac balance. With a squarewave machine you can use thoriated, ceriated or lanthanated tungstens that are ground to a point on aluminum. You get a narrower arc a can focus the heat better. The new inverter machines are pretty slick they are light and use little power.
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