In Reply to: Another look at the resistor posted by Farmer Dan on January 25, 2019 at 07:27:07:
That is not a Ballast Resistor! Just a straight dropping resistor. The true Ballast Resistor is as I explained. Low resistance when cold, higher resistance when hot.
Anyone using a 6 volt coil on a 12 volt system needs both.
Neither coil can take full stated voltage. The old Fords actually had a 4 volt coil on them.
Hopefully Bruce will jump in and validate what I've written.