Kali,
the scope shot is correct the way it was.The unipolar pulses are the large humps,and the high frequencies are riding ontop of it,because both signals are meshed together.
I think you don't understand what I mean. It is obviously like I said, as the scope is indicating at the left side it's reference potential. Surely your pic is correct, how could it not be, one ist just not used to the fact, that the zero potential is just somewhere and not in the middle. And it is perhaps a bit unusual to see the voltage waveform in reverse. these 2 things I corrected just visually. It remains the same scope shot.
If you turn off the high frequencies,all you will see are the 120hz pulses from the rectified ac coming out of the vari-ac.
Yes, if you turn off the gating, you will only see the rectified AC. But the gating pulses on the SCR are IMHO not the pulses you see additionally in the pic. But the pulses you can adjust simply either allow these SCR-pulses to happen or not. So the resonance voltage want's to switch the SCR on and off, but the gating is needed to allow this to happen or not.
This would at least be my current opinion. But I'm at replicating the circuit, so we'll see.
@Sebastof:
Now I start to understand what you mean.
It is funny. Already since a long time ago, I had almost the same idea, how the circuit worked. Just until Don trashed my idea, by saying he's sure it wasn't connected like that. But the other variant also makes sense, just in another way.
I got this idea when I first started my research on Stan and wrote my "History of the VIC" back at waterfuelcell.org.
At these times not so much facts were known as now, as in the meantime people like Don could see the real stuff.
Back then I came to the conclusion as you, that the bifilars have to be wired with the same polarity to the WFC.
At that time my thought was, that if you wanna have a high voltage, and if you wire them bifilar, you simply cannot have a high voltage in between the coils. It would just rupture your isolation.
As you I came to the conclusion, that the resonant chokes are just a tank circuit with the WFC, exactly like a Tesla coil.
If you want to go further in this direction, I can tell you some things I already discovered. The capacity of the WFC to ground is so small, in relation to the capacity of the coil, that it is almost completely neglectable. Sure you would still need a Delrin coating around the WFC, either way, as a high voltage is on it. And you would surely want to have an earthed metal around it, for without it, even after 2cm of delrin, you would have quite some static field outside without it.
One question for me, like you now, was: Should the primary be loosely coupled or not to the resonant chokes. As you can see from the SSTCs, if you are able to feed every cycle power into the coil, and if your isolation allows it, it is better to make the coupling as tight as possible. On the other hand, you don't additionally charge the capacity every time with an additionally secondary on a normal SSTC. The problem is certainly your primary driver. Namely how much voltage can it withstand. I think therefore Stand introduced the freewheeling diode in his patent driving circuit. Surely the diode will always eat up some energy, on the other hand it allows the voltage to go higher than the Transistor could withstand, and as it seems, Stans transistors could not withstand a lot of voltage. But the freewheeling loss would still be quite significant and definitely limit your Q-factor to quite a low value. But on ther other hand, I don't think you will get a high Q with such a coil arrangement anyway.
Therefore it could make sense to have a loose coupling between the chokes and the primary. But how can you achieve this, when you have a core? By using SS wire. This will drastically increase the seen "stray inductance" (uncoupled inductance).
Therefore I wound my SS chokes on the outside of the 6-1 coil, as there it would be outside the primary field. Another point, why I thought the chokes were on the outside was, that I thought, that it would be almost impossible to isolate them from the primary, if they were on the inside. And as the chokes are connected to the WFC, they should develop a very high voltage.
Well, let's say, quite some things changed since a few days...Always on the move...Again thanks to Don to share these pics and info with all of us. This is certainly not something everybody would have done!
When you fresearch Tesla's resonant charging circuit, you will see a doubling of frequency, or pulses.
http://www.richieburnett.co.uk/dcreschg.html
Actually this is one of my hate sites (no offense), when it goes about Stan. Surely everything is correct what Richie says, but it seems most people do not understand what he is explaining. I wouldn't call it a DC-resonance, as it is IMHO simply not a resonance, but rather a correct timing, but on the Tesla-sites this naming has become standard, so be it. But this is just a matter of definition. It simply says, that by correct timing you can double your DC voltage output without any diode.
On the site he also states, that by introducing the diode, you actually get rid off all these timing problems. Nothing is there anymore of these problems. So, as Stan used a diode, you can forget about it, as having any timing relevance whatsoever. Or simply said: By introducing the diode, it is not a "DC resonant" circuit anymore.
