''AlienGrey''
Can you post ''show'' a diagram of your Katcher?
 thank you!

Hi Conico, It was some years ago I did this possably 2015 the circuit would have been the Akula device
but i intergrated the IR2110 it was easier and i had a few of them bto hand.

The board does work but the device uses self oscilation katcher winding feed back.
also a puse aligning circuit was added re geo posting. Note the 50k width pot is too big
i used a 10k in the end.

Yes that is true regarding pin 3-4 this can also be used as AM modulation

Since GeoFusion posted his last i was looking at his very interesting video
if you look at the katcher his tap is 3/4 the way a long a sort of 1/4 wave.

AG

   And I want to note, that the 1 inch streamer will burn out your induction circuit, and anything else that it touches.   Some guys think that it's important to have a strong Kacher, but it's not. The Kacher needs to be tuned to the right frequency, that is what is more important. If a delay is really needed or not, is to be tested. But, the main thing is the proper sync.

   And I want to note, that the 1 inch streamer will burn out your induction circuit, and anything else that it touches.   Some guys think that it's important to have a strong Kacher, but it's not. The Kacher needs to be tune to the right frequency, that is what is more important. If a delay is really needed or not, is to be tested. But, the main thing is the sync.

Hi, NickZ
Could you give me a hand, on how to tune the kacher or where I can find such information.?
Thank you

   The Kacher needs to interact with the induction circuit, first, not to the ground. The ground will help it, but the tuning is done to the kacher by removing wire turns on the kacher's secondary coil. It needs to be tuned to around 1.5MHz, or so, with the 37.5m ground line connected to both the induction circuit, as well as the ground. That can be a starting point. You can tune it by controlling the frequency setting on the TL494 but, it will not provide the same output at the proper frequency. The higher the frequency, the lower the output will be, but it needs to match the induction circuits. That is the point.  Look at the size of Ruslan's Kacher secondary coil, or Akulas. Not Adrians or someone elses.
  That will be close to what you need to follow and replicate. But, more fine tuning will still be necessary, afterwards.
So, first set up the Kacher to run at around 1.5MHz, and then go from there. If you mix and match using other peoples specs, you'll be confused, as they may have a different set up, needing different frequencies.
   I am following the Stalker schematics, below, which is Stalkers match up and sync, 16.5KHz for the induction circuits, to 1.5MHz for the Kacher. Which is also similar to Ruslan's specs, which are also similar to Akulas second self runner, as they all were replications of Akulas second device.
  You may find that there is no match where we assume that it should be by doing the math.  It never is...but it may be found somewhere close to it.   The choke which you are calling a "line transformer" is very important. And can also burn up if it receives too high an input current. As, it is placed there to protect and control the input current. If that choke gets too hot, it may not be the right value, or your input is too high.  And, if it has too thick a wire on it, and so does not get too hot, that can also cause problems to the rest of the kacher circuit components, as it's not doing it's job.
    NickZ   

Soliman,
I didn't understand what you did with pin 13 of the TL494?

if you are using just one output pin 10 then pin 13 goes to zero line with 16 and 9

I still have the problem with doubling the frequency in push-pull. I don't know how to solve this.

The problem occurs when I start Katcher.

Hi Aliengrey,
You are, It is correct, in the circuits that we use as push pull.
if the duty cycle is very close to zero the circuit will confuse it self,when kacher is on, and becomes the only output by the position of the duty cycle,(POT) and jumps to double the frequency.
conico.
I solved this problem by working with the kacher's line transformer.
like You know, that in this jump condition there is no interaction with the ground, but when I plugged in the new line transformer from the kacher, this disappeared. and now I have interaction with the earth. and now, I have good power, which I can control.
I hope this helps
Thank you.