Itsu, what kind of shottky diodes (D3,D4) are you using to your setup?

I found some speaker wire 2X2.5mm and i ordered it. I hope this time it will fit across the circumference of my yoke as when i tried to wound it before, i had used two separate 2,5mm cables with thick insulation and couldn't fit.

For C3,C4 i will use normal electrolytic caps. Can they handle the kickback?

Hi Jeg,

thats an old diagram from the beginning of this thread.
Verpies recently showed a newer one using MOSFET drivers instead of transistors, look for it, but basically its the same.

I started with BAT46 (100V) schottky diodes as D3/4, but now i have D12G60C's in.

You can always use thinner "return" wire for your primaries, it should then fit a fairly large yoke.

I have 2x 100uF / 250V elco's as C3/4 and they are "stiffened" by 2x 100nF / 630V Poly caps parallel to them.

Itsu

 

I use Acula's driver with an ir2110 for driving my mosfets. It has not any 'enable' pins, so i guess that this topology fits more to my setup.

I'm pretty sure verpies mentioned using the enable pin on the gate drivers is just a protection circuit.  I don't think it is mandatory for proper loss-less clamp operation.  You just need to be sure whatever push-pull signal generation you use guarantees high-side and low-side will never be active at the same time.  I could be wrong, but I think this portion of the circuit only kicks-in when you are running on the ragged edge of 50% duty cycle.  If you have a fixed dead-time in your push-pull signal generation, I don't think it's needed.  Verpies can probably clarify.  Or Itsu maybe can connect the scope to his circuit and see if there is ever a point when the disable is active and the input signal is also active, i.e. overlap.

For C3,C4 i will use normal electrolytic caps. Can they handle the kickback?

Almost. Ideally these electrolytic caps should be large and have a smaller pulse capacitors connected in parallel, e.g. 1uF polypropylene film caps.
This is because electrolytic caps have high impedance at high frequencies, unlike film caps.

Itsu, what kind of shottky diodes (D3,D4) are you using to your setup?

These diodes should be able to withstand in reverse at least 2x the voltage applied to the center tap of the primary winding. 
This is the same voltage as the smallest MOSFET's max blocking voltage, that you can get away with.

These diodes must be fast.  The 1N4xxx series diodes will not cut the mustard.

These diodes do not have to be Schottky ...but Schottky diodes are fast and have a low forward voltage drop (V_F), so they also minimize V_F*I losses.

Thats an old diagram from the beginning of this thread.
Verpies recently showed a newer one using MOSFET drivers instead of transistors, look for it, but basically its the same.

Yes. The newer one is here.

BTW I did the test of  two small Tesla coils right next to each other and having feeling .........not yet. I have to inspect it again tomorrow- but in any case -it looks very interesting. Possibly exactly as Romanov said and showed. Coincidentally I read two documents supporting this theory too. Need to sleep on it now

Hi John.k1. Sounds interesting. Let us know how your tests go...

Hi Void- what the coincidence   just made a picture for you Please tell me where is the mistake in my setup.

Hi John. Is your goal to compare output power to input power?

If you want to get an idea of the output power, try this:
If you have a non-inductive type resistor, such as a carbon film resistor, you can just connect a resistor
across the output of the second tesla coil and measure the voltage waveform across the resistor on your scope, to get an
idea of the output power. For a clean sinewave, Vrms ^2 / R = the average output power. This should give you a half decent
estimation value of the output power. You can try different non-inductive resistor values
from about 10 ohms to 10K ohms to see which gives the best output power.
For a clean sinewave at the output, if you take the peak voltage of the sinewave measured on your scope
across a load resistor and multiply the peak voltage by 0.7071, then that gives you the RMS voltage.

Does?  Dog, u just made me sad    Ok I'll change my setup.

Your just playing !  COAX is about 'transmission waves' WAVE LENGTH, ever come across James Clerk Maxwell ?

Hi Itsu, guys
I finally managed with my new push pull to raise the voltage across the tuning capacitor of the inductor line. It goes up to about 800V without load at the grenade side.

I was watching this video of yours and I was wondering if polarity matters at the connection between dc bridge output and pc/psu. https://www.youtube.com/watch?v=LSjfAp-YJSc

Do you think that I can do the same with my psu? See attached image