Kapanadze Cousin - DALLY FREE ENERGY

[itsu]

You'll need to use a higher-current output stage with that 494 board though; those little transistors on the board aren't going to be able to handle much power. The H-bridge of IRF3205s shown in one of those schematics might be a good choice of output stage.

Right,

Nick should use his IRFP260N's from his mazilla (with MOSFET drivers in front) to follow this tl494 board.

Itsu

[NickZ]

Nick, it reads 25Khz as that is what the mazilla is driving it with at the moment, but that is not the resonance frequency of the 2x 12 turn bifilar inductor coil with the 0.47uF cap.

Try to get it in resonance as mentioned before.

Regards Itsu

   Itsu:   
    Perhaps I should assume that Ruslan has already found those matching resonant frequencies, for his 37.5 meter long 168 turns grenade output coil, and the matching thick 37.5 meter earth ground line. And so, he's running the Kacher, and the grenade's inductor coil circuit at their best harmonic resonant peaks and frequencies for each circuit, already, as is shown on some videos.  27.3Khz, for the induction coil circuit, and 1.7Mhz for his Kacher.
Maybe I need to go there?  I've never been, there...  I might like it, who knows.
  100khz OFF the target frequency, and I won't see the "effect".  But, I'm seeing some small effects even now, and I'm getting better at sniffing out the active "sweet spots", as well.   Man and the machine.... united as one.

  Hoppy: I get it, already. But, everything takes time.  It's free remember, and I just got notice that my clip lead scope probes will work on the signal gen. So now, I have to study up a bit on just how to use a SG, etz...
Assuming that I can still borrow one, as I don't want to have to buy one just for a single frequency test on the grenade coil.
If Ruslan is using the frequency of 1.7Mhz to drive the Kacher, for his previous device. Then,  THAT is the resonate frequency of the grenade's output coil. Or it should be. Right?

   

[NickZ]

Right,

Nick should use his IRFP260N's from his mazilla (with MOSFET drivers in front) to follow this tl494 board.

Itsu

  That's kind of how I see it, also. Use the TL494 board to control the Mazilli/yoke frequency. If it will handle the amps.

[TinselKoala]

  That's kind of how I see it, also. Use the TL494 board to control the Mazilli/yoke frequency. If it will handle the amps.

It won't be a Mazilli then. The Mazilli/Royer type oscillator's frequency is determined by the inductance of the yoke or other coil, and the capacitor that is across (in parallel with) that coil. It is an _autoresonant_ circuit that automatically runs at the resonant frequency of the tank circuit formed by the L of the coil and the C of the capacitor.

For the Mazilli (without other oscillator):
If you had an inductance meter and a capacitance meter you could measure these values and plug them into the Resonant Frequency Calculation here:
http://www.1728.org/resfreq.htm
and the result would be in agreement with what you measure on your scope. Conversely, say that you know your capacitance accurately (because it's marked on your new capacitors.) Then you can plug in the cap value, and the measured frequency, and the calculator will give you the inductance of your yoke coil. Now that you know the inductance of the yoke, you can _calculate_ the capacitor value required to give you whatever frequency you need, using the same calculator. Or vice-versa, known capacitance and desired frequency means you can calculate the required inductance. It's an equation with three parts: f, L and C. If you know any two values you can find the third by the Calculator.

You can certainly drive your Yoke coil with some other driver architecture, like the 494 module driving an H-bridge or etc. but it won't be a Mazilli and it won't automatically achieve the resonant frequency of the L-C tank. In fact if you try to drive an L-C tank circuit at some frequency other than its natural resonant frequency... strange things will happen. It will be like trying to push a child on a swing, at some other times and rates than when it's at the top of the swing each time.

[TinselKoala]

A basic electronics workbench needs to have at very least these 4 fundamental instruments:
Oscilloscope
Function (aka Signal) Generator
DMM,   TRMS if possible
Voltage Regulated, current-limiting adjustable Power Supply (CV-CC PSU)