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Old 25th Aug 2010, 6:23 pm   #20
kalee20
Dekatron
 
Join Date: Feb 2007
Location: Lynton, N. Devon, UK.
Posts: 7,059
Default Re: Old car radio - how to change polarity?

Actually, I'm surprised the 1947 Riley isn't positive earth itself.

Let us know how the DC-DC converter works - it may generate interference unless carefully located and screened.
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