Originally posted by David G Dawson
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Item #1
We don't know what we are looking for other than a scope trace that looks like a "Haystack" in an unloaded condition and then migrates to a square wave when under a load. Had Mr. Hackenberger been more specific I wouldn't be spending my weekends testing out wired circuit configurations.
He also said that the "Chopped DC" had a pointed top. That may have meant something to him but I can't follow his description at all. To me a square wave doesn't have a pointed top. Now a triangular or saw-tooth wave does but he didn't say that.
Again the peak voltage should probably be no greater than 1400 Volts if you want to call that High Voltage
Item #2
According to the transcript the Mallory (or Mr. "Boot" Mallory) company was sharing information about capacitor discharge ignition designs. Now there are two transformers involved in those early designs. The push-pull DC to DC converter and then the actual ignition coil. Standard ignition coils don't come with a push pull primary - at least none that I have found. I suspect that what was provided was the first conversion transformer that had a custom output of around 3500 Volts. But this is my speculation.
Now the voltage output of an ignition coil is dependent upon the load. It is actually a current source and thus the voltage will rise until the internal capacitance can absorb all the current in one pulse. If a large capacitor is attached to the output of an ignition coil then the output voltage drops down to a very low value during the first few pulses. It takes some time to charge it up.
The converter circuit shown the Pulse Engine patent is very confusing (of course it is not all there), but its shows a push-pull input with a fly-back secondary configuration. This is a rare design topology. The efficiency for this circuit is down in the toilet. But since they appear to be sending 50% of the output directly back to the source battery then something else is going on.
I'm sure that all of the pre-Hackenberger (pre 1971)designs were done with vibrators or mechanical switching of some sort.
Mark McKay
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