The on going saga,

shall i give you a clue ? do you know haw the devise is suppose to work ? although this device is not standard transmitter at all. when i was a kid an old clever guy in R &D, he was an amateur radio bod where i worked in electronics. He asked me round one night to see his valve audio amplifier witch was absolute brilliant,  he also showed me his Amateur radio rig, witch was even better, he had a 10w rig and would drive it into a coil and tune it up for maximum power with a large coil with thick wire linked on the earth end and a tunning cap and a 100watt bulb hanging of it, he would gradually wind it up and tune each section and he did so until the 100w bulb was blinding, he would then laugh. that's all i'm telling you !

PS The inverter driver your using was in Wireless World Oscilloscope in the late 60s to drive your EHT driver, I have one i used components from an old PSU K2061's it does not get hot at all on my test rig , you can get the devices for bugger all look up 2SK20061, have you a big cap where it goes into the choke and a common earth for the sauce leg to earth.

  Can someone point out on this Mazilli diagram, just where the protection diodes should go, please.

@Nick: Here, I've marked up your diagram with some suggestions. The MUR1560 diodes (or similar high current fast diodes) supplement the mosfet internal body diodes and should reduce your mosfet heating. The UF4007 diodes should be connected without long wiring; stray inductance in the Gate circuit is your enemy. The whole circuit should be laid out symmetrically. The capacitor value and coil turns make up the LC output tank circuit and should be adjusted (tuned) for your particular needs (desired frequency of operation). I thought you were driving a ferrite yoke coil; AlienGrey seems to think you are driving an aircore coil. My wireless power transmitters use essentially the same circuit but with a single turn, large no-core output coil and operate at 700-800 kHz. Getting up into the MHz range may simply be stressing your components, and proper layout becomes even more important at higher frequencies. The flyback transformer circuit in your picture will produce the highest output voltage from the FBT's secondary if you use 25-30 kHz for the primary tank circuit (choose capacitor value based on inductance of the centertapped primary, I use 5+5 turns on mine with a larger capacitor value to give the correct frequency.)
http://www.1728.org/resfreq.htm

(I didn't note it on the diagram but the Zeners should also be as close as possible to the Gate-Source pins of their mosfets. I consider the Zeners to be optional; most of the time I don't need them, but if they are used they should be right across the mosfets, not distant from them. Stray inductances are your enemy!)

Hello, please schemes in smaller sizes 700/600 pix. will be sufficient

Right you are, and I apologize... since I'm one who usually complains about oversized pix. Edited to smaller size.

-awarded points for you are presumed, length of what is needed for a particular coil
-and shortcuts such as 28 BNT. is the number of windings. This 6mm2 cross-sectional thickness (thick-wire).

Whaaat?

    TK, and all:
    All I could come up with is a single UF4007, to replace the two UF 306 I'm using as the cross-over diodes.
But I have lots of the IN4007, as well as the IN5408 diodes, if they would work for the cross-over diodes.
    I don't have anything like the MUR1560 diodes (600v, 15A), but I do have 2 MBR4045PT (45v, 40A) diodes and heat-sink, that may work instead.
    What do you or anyone else think would be the best way to go?
   
  MUR1560 diode specs:
  http://www.onsemi.com/PowerSolutions/product.do?id=MUR1560

   MBR4045PT diode specs:
   http://cs.utsource.net/goods_files/pdf/31/3136_MOTOROLA_MBR4045PT.pdf

Is this the thick copper tube wound round the coloured tape sections ?

to find wave length  it's 300,000,000 / by the frequency 2mhz would be 2,000,000 = 150 meters simple ain it   so how many turns or what length of wire have you on your katcher  if you don't mind me asking, as i have an idea why no one can get it to work.

what you have a problem on the 673 attached scheme jake084 He marked by what does not understand the schema
that there are specified cable length and thickness anything not mentioned in the wavelength.
The information contained in the diagram: Transformer Tesla >TT.It is 20 meters.0,71mm and the frequency is 1.5MHz.
if this is not meant?
so far diagrams are not accurate and confirmed by other designers of this device.

I think we reached that conclusion way back in this thread!

Perhaps, that is so,

but what of the coils, the winding info is BS only the 37.5 is a constant, and its 1/2 (37.5)  winding is BS, look at Wesleys device, and then their is the katcher, that must be dead on target or you get nothing, the smaller that coil is the less the gain / amplitude and then their is the thickness  it needs to be about 20 gauge even if the 'F' is correct.  Have fun, you need test equipment to get any where with this project and a 10mhz function generator, or forget it any one got a 4 beam scope they want to donate ?

  Why does anyone need accurate diagrams, and schematics, when not one person is going to be following them? Not even Ruslan.
Luck is what you'll need when you find that it doesn't work, your way.
  How do you know that the diagrams are not accurate, did anyone follow them? It doesn't look like it...

  Hoppy: the "effect" that I'm looking for, is what was shown by Akula and Ruslan when the frequencies are in sync.
That effect, with additional gain.  The effect that no one of us has been able to obtain, as yet. 
100khz off the mark, and you'll never see it.

Nick,

Yes, undoubtedly, in the current state of affairs, a lot of luck and time spent are the two essential requirements. However, I don't invest unlimited effort based on just a lucky chance of success. That's plain stupid.

What do you mean by seeing additional gain? Please explain in technical terms, as I assume that its measurable and can be demonstrated. An additional system gain does not necessarily imply self-running to me, if that's what you mean. Maybe you mean increased system efficiency? Hopefully you will be able to use your new scope to show evidence if and when whatever it is manifests itself to you.