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Using a variac when testing always wise?
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22nd Nov 2022, 12:55 pm
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McMurdo
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Join Date: Jun 2009
Location: Staffordshire Moorlands, UK.
Posts: 5,270
Re: Using a variac when testing always wise?
Many items with switchmode supplies these days have active power factor correction and these get very annoyed at variacs and/or lamp limiters.
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