Yep, the few Pertronix negative voices are similar to the few loud (but wrong) 6v Optima battery voices we heard from several years ago (before people were told how to charge a totally dead Optima battery).
My guess is that some bad Pertronix units might sometimes have been due to poor grounds, incorrect wiring, poor coils, old solid core ignition wires, or ignition-switches being left on?
