Kapanadze Cousin - DALLY FREE ENERGY

[br549]

Thank You all, and have a good day.

[AlienGrey]

Nick,

Please resize your image above!

I just tried to resize it for him, but it's a 'thumbnail' blown up to room size ;


I have just been playing with a heavy duty tesla coil and it's tuning, It's not all that powerful or big, anyway it will
do 10 mm jumps stretching to 13mm before losing when driven with 16.00 volts, my point is if I try using any
kind of ceramic spark plug like Mr Kapanadze uses it will ions the surface of the spark plug and run down its
side and load the coil. I' sure it's partly to do with its frequency rather than voltage and the fact it uses the tesla
winding as feedback into the Base driver of the output transistor and drastically changing it's operating frequency,
not good not good at all.

[conico]

I was close to finishing replica Ruslan but the mosfets are gone again. I will not use snubbers are just for small part of frequency range.
My snubbers were for small range and i use push-pull for a wide range of frequency . At 14 Khz were big spikes with 15% duty cycle, The 10 ohm snubber resistor was hot and change the value to 14 ohm.
Itsu gave me a good advise to use double winding for yoke primary so i will use Wesley's clamp.

[apecore]

I was close to finishing replica Ruslan but the mosfets are gone again. I will not use snubbers are just for small part of frequency range.
My snubbers were for small range and i use push-pull for a wide range of frequency . At 14 Khz were big spikes with 15% duty cycle, The 10 ohm snubber resistor was hot and change the value to 14 ohm.
Itsu gave me a good advise to use double winding for yoke primary so i will use Wesley's clamp.

Conico,
I had the same problem.
Gate distortion and source peak voltages above the critical fet rates.

I don' t know how your fers are placed near each other...also Itsu had that issue and seperated the fets by putting the yoke in between.
I also managed that and can draw more then 10Amps in the complete frequenty range also at all duty cycle stages.
Snubber...10nf and 100 ohm resitor as on the schematic.
Fets stays cool and snubber resistor gets normal warm.

Creating more distance between your fets wil benefits mostly.

Succes.
Ps.. changing the mosfet drivers into non-inverting did not solve the problem.....

[conico]

 Thanks I will try your snubber!