Ok now everything is up and running, i think the HEXFET i'm using now will not blow anymore, i'm using an irfpg50 now, running very nicely its rated 1000v 6 amps 2ohm rds on . The snubber made the difference.
I still get only a good behavior of the vic if there is a resistor in series with the diode (in parallel with the primary) (at high voltage levels this 1k resistor is frying and it is 5 watts ceramic)
Now i can switch up to 300v no problems. The snubber resistor get very hot, i have here 70 ohm wire wounded non inductively, (i made it around a ceramic non ferromagnetic core), as i said before the snubber capacitor is 1600v 68nf blue, and there is a 1200v 30 amp ultra fast diode in parallel with the resistor...
Well now come the interesting part, i'm not able to measure the voltage on the water, or the resonant tank, however i see the bubbles coming out like stan bubbles, very much like a fog, not very big production but is very strange. When i put the positive in the inner tube almost no bubbles come out of it but when i connect the negative inside, considerable bigger amount than previous configuration gas is generated.
So the negative must be the inner electrode.
The water was completely pure and generated the same gas as when i added sodium hydroxide, when little bit less but the same kind of bubbles.
The is also a water mist fog coming out of the water much like those for humidifiers.
I think that i'm in the right way.
The gate don't change much here, nothing perceptible.
=) =) =)
My calculated resonance F is far higher than i can measure with my equipments here, 100khz, but i'm going to try adding some capacitors in parallel so to reduce the frequency and see what happens.
B.R.
sebs