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Old 23rd Aug 2010, 5:24 pm   #12
Mike Phelan
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Join Date: Nov 2003
Location: Near Leeds, West Yorkshire, UK
Posts: 4,609
Default Re: Old car radio - how to change polarity?

Your link won't work, Chris, but the +ve earth alternator probably had a different set of diodes with the cases and leads of opposite polarity.

Back to the question, though, neon indicator has pretty well answered it in his post #9.
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