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  1. Pin_Head

    2F ignition coil voltage with ballast resistor

    At 9V, the 1.5 ohm coil will sink more current and power and may produce a higher voltage spark, depending on the RPM and inductive time constant of the coil. As long as the coil does not over heat, it will be fine. Pertronix advertises its “Flame-thrower” 1.5 ohm coil as a super performance...
  2. Pin_Head

    2F ignition coil voltage with ballast resistor

    It is a series resistance or voltage divider situation. If your have two resistors in series with equal resistance and then put 12V across the circuit, you will measure 6V at the midpoint between the two resistors. Since he only measures 5.8, this means that the resistance of the first...
  3. Pin_Head

    2F ignition coil voltage with ballast resistor

    As long as you get a reliable spark, it runs fine and the coil does not get hot, then everything is OK. If the points burn, then you may need a new condenser.
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