Kapanadze Cousin - DALLY FREE ENERGY

[NickZ]

   Itsu:
   You might try to wind the other yoke as is shown by Akula's first video, if the idea is to work towards a self runner, not just an induction heater circuit.
   I now have both primary and secondary coils all wound in the same direction, unlike the picture, although I found no difference from when I had the primary as is shown in the picture below, where to two primaries are opposite.
   I now have tuned the primary coil to 5 turns, and 20 turns on the secondary coil, the 1:4 turns ration, as recommended by some.  This has given me the best output so far, but with overheating of the fets, as you are also now experiencing.
Please, be careful with your fets now, keep your finger or heat meter on them, as it only took some seconds at 24v to blow out both of them on my first set up.
My chokes can also get so hot the insulation on the wires will melt. 
  This and more is what I'm still working on...

[itsu]

  Itsu:
  Thanks for your reply.
   You might try to wind the other yoke as is shown by Akula's first video, if the idea is to work towards a self runner, not just an induction heater circuit.
     The primary coil is 5 turns, to 20 turn on the secondary now. Or 1:4 turns ration, as recommended by some.  All winding wound in the same direction now.

I might    ,  is that primary 2x 5 turns?

Regards Itsu

[NickZ]

  Yes, 5 or 6 turns on each side of the center tap.  I had placed more turns on the yoke originally, so that I could remove some if needed to tune to maximum output.
  Of course, placing more turns on the primary coil causes less heating of the fets, but also less output, as well. So, it's a balancing act.
However, adding the HV to my Akula type aircoil's output side can somehow change the behavior of the fet heating issue, so I'm looking into that angle now, as well.
And yes, there is HV going back to the battery rails, as well. I don't know what to think about this, as it may cause other problems, in time.

[itsu]

To be complete for this special mode thingy,  here i went back to 12V (2 batteries in parallel)
and again it goes into special mode, but now somewhat more orderly.
We have a balanced situation again with some spikes, but the sine wave halfs now show some ringing, see screenshot below.
This ringing shows a full cycle of about 40us which means 25Khz.

Video here:  https://www.youtube.com/watch?v=mfS865X4SZQ&feature=youtu.be

Regards Itsu

[NickZ]

  Thanks again Itsu.  Well, at least we are finding that the fets do get hot, and the battery has nothing to do with it. You know that just one of those 12v 7aH batteries is enough to start a car, several times over, a big car.   I have done that with mine, more than once.
  To get the bulbs bright, you'll need to rewind your yoke coils as I've suggested. Remember that the primary yoke coil winds should NOT go past the yoke halves, or splits, as Geo has also suggested.
   IF you try two 100 watt bulbs instead, you'll probably find that they will light up much brighter than two 60 watt bulbs will. Also try to place tuning caps in parallel, on the yoke secondary side, 0.22 to 0.47uf, 650 volts or higher, in order to tune for resonance.   You have not tuned to balanced resonance with this set up, yet.
IF you have magnets especially magnetite magnets, try them on the yoke to see what they do to the signal on the scope. That would be good to see.

  No I'm not trying to burn your fets, but keep a finger on them, as you go higher in output. You'll probably find that the fets will also need fans on them as well, good sized fans. 
 
   EDIT:
   I just viewed this video, and thought that maybe some of you might find it interesting.
https://www.youtube.com/watch?v=zPFmhgehS6c