I can assure you that this video is 100% legit and a 100hz wave is actually riding on a 3khz gate set at about 70% duty cycle. I've double checked it several times and when I increase and decrease the duty cycle, the large wave stretches in and out not the small wave.
It is the 8XA circuit without the bifilar coil.
How the hell can a 100hz rectified wave modulate on top of a 3khz signal. Somehow they swap places?

https://www.youtube.com/watch?v=iRFysAmuiuk#

Been trying to find references to a reduced gate time anywhere in Stan's patents and I came across this drawing. Circled is a reference to a reduced gate time. Could this be what has happened to my 3khz gate frequency? Somehow the design automatically reduces the gate time so that the 100hz can modulate on the gate frequency?
The step charging effect is then better explained because the reason the voltage increases is not because of some unknown action, it is because there is a modulation effect where the voltage of the 100hz pulse train is following the leading edge of another pulse, raising the voltage amplitude depending on the angle of the leading edge of said pulse. So the original 100hz pulse becomes a parasitic waveform.
That could explain it. Some kind of voltage amplitude modulation effect.

Normally, when i've gated a pulse train in the past, the pulse train voltage i've gated gets chopped into 50% duty cycle pieces of on and off. This time I've gated with an higher frequency than the pulse train and it causes it to modulate the main pulse and creates an apparant step charge but the peak to peak voltage remains the same. So instead of modulating your voice as in an am radio transmission, it is modulating the voltage like thus:-

Nav
I now experimented with bifilar coil, can i ask you about resonant length from flyback  diode to bifilar and from cell to bifilar - must it be the same length?
Sorry for off topic. Thank for your help.
andy

Quote from andy on February 18th, 2015, 04:36 AM

Nav
I now experimented with bifilar coil, can i ask you about resonant length from flyback  diode to bifilar and from cell to bifilar - must it be the same length?
Sorry for off topic. Thank for your help.
andy

Yes, the flyback loop and the cell loop are less than a quarter wave of the drive frequency.

I've just been doing a few more tests with the main frequency from the generator and the gate frequency. Depending on what frequency the gate is at, the carrier frequency is changing from the main pulse to the gate and vice versa. It seems that there is definately a carrier wave and a parasitic wave or side band and the voltage gets ramped up because of the leading edge of the carrier wave.
I'm more confused about this Poo than i've ever been. May take a few weeks off and come back with some fresh thoughts.

Nav
Do you testing the bifilar coil?
andy

Nav
Can you say how to wound bifilar in different ways that will actually multiply the voltage by a factor of 64x the input?
Thank for ansver.
andy

Andy, when you wind your bifilar coils, wind one turn left to right on one wire then the other right to left, next to each other then keep winding one left - one right all the way up the core then come back down the core in the same way but make sure when you have all your windings on that you finish at the opposite end of the core to where you started.
Remember the left to right rule of the bucking coils? Well you are winding bucking coils on the same core but each wire winding is next door to an opposite winding all down the core.
It is extremely hard work to do this and you can't use a coil winder to do it because each wire goes in the opposite direction.
Thus:-

Nav
Thank you for description. I will try wind this way.
andy