After many months of testing we have developed an internally resisted coil that outperforms the competition. This coil (ABC509) now puts out nearly the same voltage as the hot coil without using an external ballast resister.
Internally Resisted 12 Volt Coil
04/15/2016Written by Suzette Thomas
How many volts does this internal resistor coil put out? I am looking for a good high output coil for my 3500 Ford tractor. I want to eliminate my external resistor if I can. Rev. James Bookhout.