Re: Variable coil ballast resistor
To some extent these numbers/ calculations are just appropriations. The operating voltage is more like 14+, not 12. The resistance changes with temperature. There are other factors involved besides just the ballast resistor and coil, such as wire size and length and any other current paths in the circuit. And etc, etc, etc. So 3.0 ohms resistance and 12 volts are just ballpark talking points.
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