About the 7.5 cps.
Take a look at the patent Herman referenced and see the ac square wave? That part of the waveform produces a discharge at each cycle of the HV ac portion of the waveform.The total square part of that waveform is what is pulsed at 7.5cps.
Here ya go....this is the patent Herman referenced and this is what Herman was talking about.
https://www.google.ch/patents/US4820957
Figure3 is what is required plain and simple.
To be more specific that wave form is wat the primary needs to see.The square part is the resonate or standing wave.Its much like Puharich and Stans waveforms.Its modulated at 7.5 cps.
Took me some minutes to understand that patent bla bla...
Here is what i think is written wrongly.
You see, if the minus of a dc powersource (battery) is hooked up to the engine and also one side of the secondairy coil is hooked up to the engine, you will never be able to create alternating currents.
What happens if the breaker points are closed is that current charges up the primary coil and also the secondairy coil gets a charge because of the changing magnetic field in the core.
When the breaker points disconnect, the primairy coil discharges into the capacitor that is hooked up over the breaker points. What then happens is a short time of resonance between the coil and the capacitor. Series LC resonance.
The patent calls it AC, which is wierd.
The output of the seconairy coil is hooked up to ground on 1 side and the otherside goes to sparkplug.
So, the waveform at the sparkplug should look like an AC waveform, but actually is positive ac wave form looking wave, as the totall wave never gets under zero volts....
Hope you understand. Otherwise just ask.
The first part of the patent is just a frequency converter changing DC into a ac pulse to feed the first transformer.
After the transformer a bridge rectifier changes the AC into pulsed DC....
cheers