Posted by John T on July 02, 2013 at 04:26:34 from (216.249.76.176):
In Reply to: Re: 12 volt resistor posted by Texasmark1 on July 02, 2013 at 02:32:03:
Many old tractor companies actually went even further and limited the points switching current to more like 4 amps in which case at 12 volts used 3 or so ohms in the ignition primary circuit (coils LV Primary + any external ballast). Many generic ballast are like 1.5 to 1.85 ohms while some are even higher. If a person wanted a true 50/50 static voltage divider to drop 6 volts across the ballast and 6 across the coil, the ballast resistance would be the same as the coils primary.
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