@NickZ and others who may be interested:
Here's a photo of the main board of my TinselKoil 2, which seems to have circuitry very similar to some of those I've seen in this thread and the other Kap threads. I've annotated some parts of interest. This circuit took some time to develop and I blew a lot of transistors doing it, but in the form shown it's reliable and robust, as long as proper cooling is provided to the transistors.

It has a TL494 chip producing the clock pulses, with duty cycle and frequency control from the little blue trimpots. The output of this PWM chip is then split and inverted by the 2n7000 stage, producing 2 antiphase square waves. These are then fed to the PNP-NPN bipolar H-bridge for current amplification. The outputs from this bipolar bridge are fed to the primaries of 2 trifilar toroidal phase transformers. Their outputs then directly drive the gates of the corresponding high-current mosfets in the primary H-bridge. This bridge switches 170 VDC from the main DC supply from the mains, and is capacitively coupled to the resonator's primary coil consisting of a few turns (4, IIRC) of heavy wire around the base of the low-aspect-ratio secondary.
The primary bridge can be switched from full-bridge to half-bridge mode by the little toggle switch, and the whole thing can be put into autoresonating mode by letting a CMOS inverter/schmitt trigger chip with a little antenna detect the field of the resonator and make pulses to clock the 494 that way, instead of using the external RC network for fixed timing.

And then I've attached an image of a characteristic "psark" from this coil. It's about 15 cm long.

  Tinsel:
   Ok, so there are some similarities.  And you should be able to help figure out what Akula is doing in his set up.
   It does seam as the working principals are the banging together of two different pulses, or maybe just one, and harvesting the additional energies that are created by that action, using resonance to control the shorting, at the right frequency.
I may not be saying correctly, but I think I'm getting the point.  NOW, the HOW to do it, is what we need, as always.

  T-1000, So, what are you waiting for?  Others to do it?   Why???  No spoon?

Like kids... (don't take seriously) When this stuff will become as general knowledge the "pot" will be in everyone's house who wanted it.
I shared my knowledge, your turn to use it or ignore it.

It has a TL494 chip producing the clock pulses, with duty cycle and frequency control from the little blue trimpots. The output of this PWM chip is then split and inverted by the 2n7000 stage, producing 2 antiphase square waves.

Why?  The TL494 already has complementary outputs.

These are then fed to the PNP-NPN bipolar H-bridge for current amplification.

Does that bridge have a better performance than integrated MOSFET gate driver (e.g.: UCC27511) ?

the whole thing can be put into autoresonating mode by letting a CMOS inverter/schmitt trigger chip with a little antenna detect the field of the resonator and make pulses to clock the 494 that way, instead of using the external RC network for fixed timing.

Cool.  Is that antenna difficult to tune ?

And then I've attached an image of a characteristic "psark" from this coil. It's about 15 cm long.

...and what are the dimensions of the secondary winding?

  quote from Verpies:  Concerning Woopy's scope shots.
  "It was a mistake to take that voltage waveform reading without a resistive load in place of the light bulb.

  Well maybe it was, but this was the path that UFO politics used to get his motors working in a very unconventional way. UFO is also able to light several huge 85watt CFL bulbs, giving many lumins, as well, using what he calls "COLD ELECTRICITY". (the green flashing Cfls).  The main thing is the circuit, and how it may be  similar to what Akula and others may are doing. 
I'm looking for clues...

   Woppy's scope shot are meant to show the tuning of the circuit using the two pots and scope, to find the sweet spot, although that is somewhat conventional, the ultimate results are not.
   I use a light bulb to show me the same thing, as I'm not concerned as to what frequencies are shown by the scope. Having the two trim pots is a great advantage though.

  Tinsel:  Thanks for your analysis of the akula devices. That is the point.  Those pictures are fairly clear.
And yes, I'm guessing as to what the diode values are, the point was the current direction as they are pointing towards each other.

  Menof:  Using the single Fet (in woopy's video) is similar to what you are showing in your diagram, it is a simpler version, to look for the working principals. It also shows that a single Fet will work fine, also. Although he is not showing any real gain by it all. That was not the point  when he made the video.
  Maybe one will not see the input readings drop until there is a feed-back path.  Or not?

One man in one forum made selrunner, but with 3 w led bulb 220 volts, but it light on 100 volts. He say that most inportant is LC circuit and generator. And that very hard find exatly needed frenquency. Need with two potiontiometers for example 200 kiloom and 20 kiloom for tune. But very hard find needed frenquency.

One man in one forum made selrunner, but with 3 w led bulb 220 volts, but it light on 100 volts. He say that most inportant is LC circuit and generator. And that very hard find exatly needed frenquency. Need with two potiontiometers for example 200 kiloom and 20 kiloom for tune. But very hard find needed frenquency.

  Many of the 220v 3watt bulbs can be lit on 110v.  The car 12v potentiometers can also be used when working with 12v input sources. They don't burn out as easily as the smaller trim-pots can. Small variable capacitors can also easily fry, and may be hard to replace when looking for the heavy duty ones for higher outputs.
  But, if the guy had a self runner, that is unusual. And, that it's not easy to find the right frequency, is also becoming more known each day, which is not making it any easier to obtain the needed results.

  Yes, thank you.  But my question is why are the diodes facing each other? Is this typical, or not?  And if not, then what does that mean? Are they helping to make the charges buck each other, or just to protect the Fets?
Because, if there are not opposing primary coils, then this may be another way to obtain the bucking mode objective. Or not?

  Yes, thank you.  But my question is why are the diodes facing each other? Is this typical, or not?  And if not, then what does that mean? Are they helping to make the charges buck each other, or just to protect the Fets?
Because, if there are not opposing primary coils, then this may be another way to obtain the bucking mode objective. Or not?

Take a look at page 2 of this link to this data sheet of a mosfet that has an inbuilt back-to-back zeners plus an explanation of their purpose.