Kapanadze Cousin - DALLY FREE ENERGY

[NickZ]

  Itsu:
  Good to hear that you're back on line. I wondered where you had gone to.
 
   I tried to take a pic of my Kacher's streamer, previously, and the cell phone camera just goes nuts.  Somehow I was able to take a video a couple of days ago without any problem. 

   My question:  My 3 turns circuit at the capacitor is reading a running  frequency of 25Khz, using only the 2000v 0,47uf capacitor. The Kacher's output frequency at the antenna is 1.2Mhz, and this is controlable to some degree, from 1.1Mhz to 2Mhz.  Grenade's self resonance frequency was 1.85Mhz. And raising the Kacher's frequency to 1.81, or so, did nothing to improve the sync.
   So, I don't have them in resonance, as absolutely no gain is noticed when I add the Kacher's signal to the induction circuit.
Any suggestions?

[Hoppy]

Jeg, 

this new snubber setup is not great, i had to add 54V TVS's (3x 18 in series) across each primary of the yoke to tone it down a bit,
but still there is massive ringing on each signal, see the screenshot.
It looks like my old setup signals.

Also to notice is that R26 (0.5W with me) gets very hot like you mentioned, so there needs to be a 5w resistor or so there.

When dismantling the old setup, i noticed that the both 47nF snubber caps (C12) i had in were toast, so thats probably the reason my old setup also had similar massive ringing.

Not sure what to do, leave it like this (yuk), or go back to the old setup with better 47nF caps in.


Regards Itsu

Itsu,

As I suspected, the Allegga snubber arrangement appears to be inadequate. If you decide to go with Verpies clamp arrangement, make sure you don't inadvertently open circuit one of the electrolytic caps whilst running. I did this and blew the PWM mosfets, drivers and voltage regulator to smithereens! However, I did find that the waveforms improved considerably with the clamp. I used 2 x 4 stranded 1mm Litzed ECW for my primary and clamp.

Regards
Hoppy

[Jeg]

Sorry to hear about your Laptop Itsu! Your absence was noticeable..

I also have problems with my new setup. When i fire Kacher, a lot of noise gets into my yoke coils even with separate power supply and ground points. I started rewinding my yoke and isolating the two halfs just to see its behavior. My old setup was fine and with isolated halfs!

Itsu, your old setup's snabber had 47nF caps. What resistance value did you have? If i remember right, it was something around 1Kohm? And what wattage?

Tnks Jeg

ps. Nick i wish i could help you man but tuning is a b...itch! Everyone has his own!!!

[Jeg]

However, I did find that the waveforms improved considerably with the clamp. I used 2 x 4 stranded 1mm Litzed ECW for my primary and clamp.

Regards
Hoppy

Thanks Hoppy!
What Capacitor value did you use at your clamp? Did you use the 0.1Ohm resistances?

[Hoppy]

Thanks Hoppy!
What Capacitor value did you use at your clamp? Did you use the 0.1Ohm resistances?

Hi Jeg,

I used 100uF / 400V low ESR caps and some resistance wire to form the two 0.1 resistors.