Posted by John T on January 10, 2014 at 09:20:40 from (71.0.66.0):
In Reply to: 12v coil posted by sparky70 on January 10, 2014 at 07:38:46:
One converted to 12 volts, the choices are:
1) Keep the old 6 volt coil and use an external series voltage dropping (12 to 6) ballast resistor.
2) Use a full true 12 volt coil (some call internally ballasted, although there's actually NOT any discrete stand alone resistor hidden away inside lol)
One advantage of a 6 volt coil plus an external ballast, however, is the ability to use a start ballast by pass circuit, so when cranking the coil sees un ballasted battery voltage for potential improved starting especially if its cold.
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