Great question good neighbor, What do they put inside the distributor to excite the Pertronix ignition on and off to produce the spark?
The points inside the distributor are replaced with a cover that fits over/around the distributor shafts rotating cam that essentially locates small strip magnets right where the cams high lobes are located. On the plate right next to the rotating cam (where points were) a pickup coil is installed so each time a magnet (on high cam lobes that opened points) passes by the pickup coil a voltage spike is produced thats used to trigger the elec switch module to momentarily OPEN the circuit thats conducting coil current. Same thing whereby the points when closed conduct coil current but when open on high cam current is interrupted causing the coils magnetic field to collapse and induce high voltage over into the coils HV secondary causing the plugs to fire..
Hey George thats NOT perfect or 100% correct/accurate or in any way complete, as that would take too much typing, but I hope it answers your good question. Im more into electricity than electronics but believe this to be basically correct and maybe some more current electronic engineers can add more to this ...
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