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Message: <blockquote data-quote="Rochey" data-source="post: 643953" data-attributes="member: 451">You might want to look into using PTC's on the secondaries.(I think that's what they are called)As current increases, they heat up. When they hit a certain temp, they'll stop conducting.I'm not the guru on them yet though, so my explanation may be incorrect.Do some googling. (I'm about to!)/R</blockquote>