I may have been presumptuous in saying the coil burned out from keeping the ignition on. I know that some Pertronix systems are supposed to be safe from leaving the ignition on, but I assumed that the hall-effect module was the thing that was protected and not the coil. When the new coil solved the problem, I assumed (there's that word again!) that verified that the ignition/coil issue was the cause.
QC is never 100% so if the Pertronix guy says it was likely a bad coil, I would believe him.
Well, it sounded good anyway.
Sorry if I misled anyone.