RE: Ballast resistor question

["Stephen Hanselman" <tr6@kc4sw.com>]

Mark, (et. al.)

OK you caught me:)

But, the issue is not really the amount of current flow through the ballast
resistor and coil but the voltage across the coil.

Assume that the ballast resistor causes a drop of voltage from 12VDC to 8VDC
at the high side of the coil and that in a normally operating car the spark
output is 25KV.  If we attach a power supply set to 8 volts and allow it to
supply as much current as possible, the spark coil would still put out 25KV.

Steve