Re: Re: Bad ballast resistor on 12V converted H

Posted by Bob on May 25, 2004 at 21:01:46 from (66.163.134.177):

In Reply to: Re: Bad ballast resistor on 12V converted H posted by riverbend on May 25, 2004 at 17:07:32:

If you have the PTC resistor, the value will drop within seconds of removing power from it, as it quickly begins to cool. The only accurate way to measure it's hot resistance is to measure the current flowing in the circuit, and the voltage dropped across the resistor, and calculate the resistance.

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