Re: 6 volt to 12 volt

Posted by Bob on October 31, 2006 at 18:43:33 from (69.178.229.154):

In Reply to: 6 volt to 12 volt posted by ralbert on October 31, 2006 at 18:35:26:

Check the primary resistance of the coil with it "out of the circuit", with a good Ohmmeter, and you should see a resistance of between 1 and 1.5 Ohms for a 6-Volt coil, and between about 2.75 and 3.5 Ohms for a true 12-Volt coil.

What does your Ohmmeter read, with the leads shorted together? What range are you using?

Whether or not you can use the coil without a resistor depends upon the coil's actual primary resistance.

The resistance of the coil's primary, plus the resistor, if used, MUST be AT LEAST nearly 3 Ohms or more, or the coil will overheat in use, and the points will be carrying too much current, and point life will be short.

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