"Does anyone know just what the voltage at the kacher output is supposed to be?"
Touch with finger, one spark milimeter is about 1 kilovolts.

A person is better off using the tip of a screwdriver or something like that
if you don't like burns and shocks. The distance a spark jumps depends on
various factors such as humidity and the shape and type of electrodes, etc.,
so judging the voltage this way is only a rough guideline. You can test with a sparkgap
using needles for the sparkgap electrodes, and there are charts that list
approx. voltage versus needle air gap distance, if you want to estimate a bit more accurately. 

For example, see:
"Measuring high voltages by spark length"
http://www.kronjaeger.com/hv/hv/msr/spk/

Here is new explanation of Ruslan:
https://www.youtube.com/watch?v=xOc-7EXMvNc - Same stuff as from akula about peaks on sine waves...
Also this is same old effect as in Ismael Aviso car http://youtu.be/wC6aglJ6a_8?t=1m

Cheers!

Here is new explanation of Ruslan:
https://www.youtube.com/watch?v=xOc-7EXMvNc - Same stuff as from akula about peaks on sine waves...

Thanks T-1000. Looks like Ruslan is explaining a lot in this video.
Too bad I can't understand him.    Is he saying he is only putting a pulse
on the positive peaks of the low frequency sinewave, or what exactly is he saying
about that?
All the best...

P.S. It all looks straight forward enough.  It really shouldn't be long before
other people can reproduce this with all the info Ruslan has been giving out...
I think I have a half decent idea now on how to approach this.

Guys, is there any possibility that pulses from Tesla coil to be of one side? Perhaps with a diode or bridge?

I don't speak Russian, but it appears that is what Ruslan stated in his video.
All the best...

Hi there

yes 2N3055 will do good and very good for Kachers too.

Cheerz~

  It looks like Ruslan is not using the old round Russian transistor for his Kacher part of the crt now. It looks like the TIP3055 type now, but the 2N3055 should work well, also. It's mounted on a very small heatsink, and with no fan.
  From what I can see, the SG size and intensity from the second Akula device is of lower voltage (about 2000v or less), low amps type. No RF burns.  2 mm sparks.

  Itsu: Thanks for the video link to your Kacher readings. Your Kacher is much bigger than what it being used by Akula/Ruslan, it almost twice the size/turns.
Input voltage used is the same, 24v.  So, I figure that their Kacher output voltage is about 1/2 of yours, or less, with low mAs, as well. It's also has silent SG. It may be wound with about 200 turns of 22gauge, wire, or so
It would still be interesting to know just what all the exact coil winding specs are though.

 
  Geo: Welcome back...
 

A negative voltage pulse on the peak of 220V will force the coil to react with a positive current pulse!

I have some 3055. Can they do the job for katcher?

For 1,4-1,5 megaherc its is to slow. For 500 kiloherc and lower its is normal.

MenofFather, is there any new information in this new Ruslan video?
He seems to have gone into a lot of detail in this video about various things...

He say, that his tsla working on about 1,5-1,6 megaherc. First wounded secondary with ticker wire, then with tiner to ajust. And how we see in that divice no ferite road betwen kacher secondary and antena.