Posted by 440roadrunner on March 17, 2009 at 22:24:31 from (98.145.76.31):
In Reply to: 300 12v conversion posted by Janicholson on March 17, 2009 at 08:17:13:
Janicholson said: (quoted from post at 08:17:13 03/17/09) Some regulators (6 and 12v) that are of new internal design use diodes and or Voltage control circuits which are very polarity specific. These cannot be polarized for either grounding system, do not let the smoke out. (I know you know this Bob, it is for Makin,Hay)
"polarity specific" also applies to many old vintage relay type regulators. My understanding is that some replacement regualators were "universal" and that the difference was in the makeup of the contacts. Evidently it was a tiny bit cheaper to make contacts that would put with arcing "on one side" for a certain ground polarity.
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