I put the function generator on ''antenna'' and the scop show me a maximum amplitude of grenade coil at 840 to 860 Khz and an other point  was at 3.4Mhz. I didn't succeed with Katcher at 3.4Mhz.
Anyway I don't like Ruslan devices you can not start them with 9V battery. The devices must be simple, Kapanadze said.
I try to tune the inductor and series cap at 60th of harmonic of 860 khz, first the device work at 14,xx Khz but is the same result as now

Yes i had that with one the kaccha I played with 4.something meg I just treated it as in Akula video and used some 15kv caps to bring it down across the HV coil itself about 30 pf got it down to 1.5 MHz for 40 meters just about right now I get a nice large sine wave at its proper resonant frequency I haven't seen anyone use 1/60th is all I have seen is 1.5mhz = 15khz on grenade inductor but 30 would have a better xl impedance, if you remove or add turns it's no longer all in resonance I wouldn't go down that avenue my self it messes up the Lambda and you end up with bin fodder,

NickZ my dear friend I know what your saying and why your saying it, but experimenting and getting results is and then putting the various experimental modules away after is one thing for experiments but actually being GOADED ON BY SOME SORT OF STIMULUS into running such a device for gain might well be illegal so your right I don't have a running device nor am I interested in an autonomous or auto-starting device  but it doesn't mean I'm an idiot either !
I hope that explains my position.
ag

NickZ , can you, please, show me what is Geo's older wiring method? I want to try it.
thank you!

Nick
luckily or not, this is the way things work. We ''see'' things according to our own capacity. Capacity is related to experience. Obviously, AG was already in a level that could find something useful in Color's points of view.

It was a diagram you posted a long time ago with a kacher with mosfet, a long Tesla coil, an other step down ''Tesla coil'' and no ground on this device. It was  a capacitor in series with the bulbs too.
I will look for that diagram.

Some people seem to be mixing up the demo videos between 'Roma Gritz' and 'Maxim Aliyev'.
It is understandable that people may be mixing up these two since their setups were 
similar, and both were hawking their devices on Youtube for about $5000 USD more or less,
and both were in Ukraine. 

The 'Roma Gritz' guy (Рома Гриц) first posted one or two of his videos on Youtube under the
name of 'Andrei Bryukhovetsky' (Андрей Брюховецкий), and then later posted some more
videos on a new Youtube account under the name of 'Roma Grtiz' (Рома Гриц). That was around early 2016.
The Maxim Aliyev (Максим Алиев) guy came later in 2017, but similar M.O. to the first guy.

A couple different schematics were posted that were supposed to be the 'Roma Gritz' schematics,
but who knows if those schematics were at all accurate, but they showed coil assemblies with
several coils wound inside them. Not really a simple circuit, if at all accurate.

A connection diagram for Maxim Aliyev's circuit directly from 'Maxim' was posted in this forum as well.
It was confirmed by the purchaser that the coil assemblies had one or more extra coil windings inside them,
so possibly similar to the 'Roma Grtiz' circuits.

None of the above names are likely legit for those guys, and they both acted very much like scammers, IMO.
The 'Maxim Aliyev' device purchased directly from 'Maxim' was confirmed by a forum member here to not have worked for him.

The above is based on my notes at the time, so should be reasonably accurate I think. I personally haven't heard any updates since then.

I have several of the schematics that were posted for the above guys saved to my hard drive, but it appears
no one really knows what the actual circuit was for 'Roma Gritz', or whether it really could work or not.
Regardless, both those guys had scammer written all over them, IMO.
Could possibly have been the same guy behind it all in both 2016 and 2017.

Jeg , i found it, the diagram that i tried to replicate. You have a picture of sa device i'v done, i changed Kasher with mosfet with Kasher with 2SC5200. The last one start to make sparks between the isolated wires . I stoped this project until I finish with Ruslan's replika.