Tomtech:
  You'll notice that the bigger wattage bulbs on the Akula video are not fully lit, either. But, without using those bigger high wattage bulbs, the device will not self run, as it won't be able pull in any "extra" energy, and then just works like an low efficiency inverter, instead.  At least, that's what I think, and notice on my set up. That, there is an optimum load level, where the device works best.

Dear All.

I'm busy with TinMan's RT device at the moment but noticed some interest in our experiments from 2 years ago. Here's a link to the video I made at the time.

  https://www.youtube.com/watch?v=LOqjTHmmumU

The internal LC arrangement consisted of two concentric Aluminium slit tubes with a suitable dielectric ( A3 Lamination pouch ) and a 600 turn 32 SWG coil on 50 mm PVC former.
This LC circuit was monitored by a 10 turn 3mm thick insulation coil and was suggesting up to 10 Kv PP resonating at 3 times approx. the input frequency. 

I gave up with this device after attempting to heat up a 30mm Dia Steel bar, which it did very well but managed to burst one of the £13.00 per unit IGBT's !! At the time our family budget was a little grim so I could not afford to replace them.

The coil still sits on the bench, a Monolith to the pursuit of free energy for all !!

Cheers Grum.

Quote from: Tomtech29 on July 28, 2015, 12:42:02 PM
I'm currently using the

hi Tomtech29,

Try not to use the varistor i have previously removed those as those were getting heated really bad,swelling up.
The varistor rating i was using 470volts high Amps rated.

Instead of 7.1 ohms i just sticking with 5.1ohms 2 watt resistor which is the same value resistor to mosfet drain.It would be better to place a 30volts sk diode in parallel with resistor 5.1ohms to drain.
This i have not implemented during PCB circuit designing.
3Amps 1000volts diodes UF5408 is used between drain source and another for snubber.

Akula was using 600volts IGBT but i am using 1200volts IGBT which did not fail even without snubber.But the waveform looks better with snubber circuit in place like i have attached few days back.

Quote from: Tomtech29 on July 28, 2015, 01:24:26 PM

magpwr
so when you watch you will see that the generator is set to about 75% shorter cycle course this time uses less energy by heating of the transistor and the loss.
- of 2 amps and resonance is achieved at the expense of 12 amps so because of a good core and a thick cable on it 6mm2.
However, in the next film where an incandescent lamp 300W. with high power and power from the power supply almost very low energy consumption!
what is cool?

hi Tomtech29,

I know.But Akula is using interrupter circuit to TL494 to drive IGBT which we never once thought about it.This is the next stage of designing and testing for me.

  Grum:
  That was the diagram that I further corrected. As the rectified 311 volts from the inverter goes to the 28 turns yoke coil, as can be seen in the video. Not to the center tap on the yoke. There is no earth ground shown on that diagram, either. And some other things as well.