@void,
Take a look at some of the stuff I posted above, this might help with the antenna/dipole statement. A dipole is nothing more than a rod antenna, the other side is the ground, this can be provided by a ground plane (rods or a plate that is matched to the wavelength of the radiator) or a ground connection, where does the ground go in these in most cases? thru the center of the tube, but I don't think this is a requirement. The wire length of 37.5m was to match the 1.8mhz wavelength (Ruslan), but the ground length becomes less of an issue when the operating frequency is lower.

I am quite familiar with radio antenna theory, and what you are saying does not match what Akula has
explained in his video regarding the two windings on the ferrite rod, and the large terminating coil, nor does it
match the definition of a dipole antenna. These components are not a 'dipole' antenna or a matching section,
as Akula has explained in his video. I suggest you watch Akula's video and read through the transcript of what he
says in the video. Yes, a tesla coil acts somewhat like an antenna, having voltage maxima and voltage minima nodes,
and the ground acts similarly to a ground for an antenna as well, but this is all separate from the components you were
referring to (the two coils wound on the ferrite core and the large terminating coil).  I will leave it at that.
All the best...

@void,

If you are then please look at this as I am and see if it makes sense. I am not asking if it matches Akula's statements. I have played with radio (CB, i.e. 11m) in my youth and built and tuned them so I know a few things too. 

As far as what he says is not true then, he is just hiding what it really is. look at the items I am saying they represent, they are out there on the internet, go look.

TO me this is a tuned coil arrangement using a spark gap type transmitter and modulator circuit. I am not saying it won't work, I am saying what I see it is, at least to me, and how we can build and tune it to make it work properly. This device will have stability issues if the load changes too much since it depends on resonance.

TO me this is a tuned coil arrangement using a spark gap type transmitter and modulator circuit. I am not saying it won't work, I am saying what I see it is, at least to me, and how we can build and tune it to make it work properly. This device will have stability issues if the load changes too much since it depends on resonance.

Hi starcruiser.  Akula definitely seems to be making use of tuned circuits, but beyond that
I personally don't know why this particular arrangement might produce over unity,
if it really does. I am still experimenting to see if I can find anything unusual about this setup.
Lots more experimenting to do however.
All the best...

@void,

I did a little more digging and the ferrite rod is more likely a home made balun that matches the antenna to the transmitter. the windings show it is a 1:1 used for impedance matching

More to do, later.

This should be easy to answer
how do I change the frequency of the kacher?

Wound kacher secondary with diferent wire lengh or on diferent tubes, but more depends on wire lenght.

Is there anyone here that recognizes the similarities of Akula's technique with this at the link below?

http://www.overunity.com/14198/a-method-for-static-gap-control-for-high-bps-rates/#.VCLLEZVxlLM

  The ferrite rod and it's two small side coils that are between Kacher secondary and the big output air coil, is a choke.
  It drops the voltage and raises the current levels, thereby changing the big antenna coil's transmitting frequency(ies).  At least that is what it has done on my set up.  That ferrite rod choke/inductor, is the big antenna coil's tuner.
  Does anyone know just what the voltage at the kacher output is supposed to be?
I doubt that it's 35.000 volts, as has been mentioned previously. But, maybe.

It is a kind of 'choke', but not an ordinary choke.
It is wound in two coil sections in series, with the windings on the two
coil sections wound opposing. From what I can gather, Akula described
its purpose as being there to create high voltage spikes from the output
of the kacher tesla coil secondary winding. I am still experimenting to see
if I can get any significant voltage spikes out of this type of choke arrangement.
It didn't seem to do much of anything in my initial testing, but I plan to do more testing
with this.

@starcruiser, it is definitely not a balun. The only similarity to a balun is that
some baluns have coils wound on ferrite rods, but a balun is connected differently
and serves a very different purpose, which is not what Akula is doing at all.

All the best...

"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.