http://www.liveinternet.ru/users/edward_lee/post241427460/

"
Я никуда не делся)))
   
Было много работы, одной установкой сыт не будешь)). Вечерами если позволяет время делаю еще одну.
Тут очень многие рассказывают, что это фейк)) ну , что же у каждого есть свое мнение и его не изменишь, хотя наверное так даже лучше - мне спокойнее.))
Я ни в чем не собираюсь никого убеждать, это как я понял из личной переписки бесполезное занятие, и даже если человек и собирает, то светиться не будет, это опять же таки из личной переписки.
Вот такие факты.
Я конечно результаты измерений сюда выложу, но я думаю , что это все чем смогу Вам помочь.
С уважением.
"

Translation:
"
I did not disappear ))
There was lots of work, with one device you wouldn't stay around. ) In the evenings if there is time I am doing one more device.
There are many who are saying that it is fake ) Well, everyone has own oppinion and you cannot change it. Maybe that is even better - I am less disrupted. )
I am not going to proving for anybody, this is worthless thing from how I understood from private mailing chats and even man is assembling device, he wouln't not expose himself, this is again from private mails with people.
This is how are the facts.
I will provide measurement results here but that is only how I can help you.
Regards.
"

I will provide measurement results here but that is only how I can help you.

Thanks for translating it - I appreciate how much work that is.

I think that the measurements and a schematic that these measurements refer to, constitutes essential information.

@T-1000 <-- Could you please ask this guy to point us to the up-to-date schematic that his measurements refer to.

Also, the construction details of any non-standard components are very important. Non-standard components are components, such as coils, transformers, waveguides, etc..., which cannot be bought off-the-shelf and must be self-made.

Since we have a willing russian translator here - does anyone else on this forum have any questions to Dally about his "non-standard components" ?
He already described many construction details of his "main cylindrical coil".

Well, I have to write that I am impressed.

verpies,

C1 consists of 3x 10pF caps in series (see picture) so theoretically it should be around 3pF.
I also tried 4 cm of intertwined wire which worked, but was not as stable.

The DC bias voltage at the top of the 1M ohm resistor is 91.5V with a sawtooth wave on top of 2.4V p2p at 1.3Khz

Concerning the lead length, see picture.
I have changed the 50 Ohm resistor (R4) into a fixed 100 Ohm and a variable 100 Ohm in series, so
the puls is now 8V at the same 3ns width.

Regards Itsu

I could try that.

I did hook up my Dally main coil (shorted) coax to this pulser, and there appeared a negative (reflection) pulse 66.4ns behind the main pulse.

Doing the math (speed of light: 299 792 458 m/s  =  0.299792458 m/ns  x velocity factor of my coax which is 78% (foam)) i end up with 15.52 meter, divided by 2 is 7.26 meters (hmm i thought it was 6,6 meters).

Regards Itsu

I have to warn you that if the resistance connected to the emitter of Q1 is not equal to the intrinsic impedance of the coax then the reflected ns pulse will reflect from Q1 again into the coax, and you will get multiple echos. Each echo will be weaker because of the loss incurred while traveling inside the coax.

I have attached a scope shot (x10 probe) taken collector to ground of an inverter MJL21194 transistor operating at 4.6KHz.

Current draw - 2.86A @ 12.3V. Output - 111.7V into a 1K resistive test load.

The transformer is a big mains toroid with 2 x 9.4A primaries.

I have used a P6KE30A (30V) transorbs with 33R series resistors for snubbers across C/E of each MJL21194. A smaller 24V transorb with 33R resistor is also fitted across the TL494 supply rail.

There is ringing on the waveform but I'm reasonably happy with it for this application. However, it is clear to me that given that Dally used bipolar transistors for his inverter, with the circuit as drawn, this would have not delivered very much power to a load irrespective of the transformer type. We need to see the full spec on the toroid transformer he used.

Regards
Hoppy

Here are the velocity factors of coaxial cables using these types of dielectrics:
 
Dielectric Type                        |    V_F
--------------------------------------------------
Solid Polyethylene (PE)             |    66
Foam Polyethylene (FE)            |    80
Foam Polystyrene (FS)              |    91
Air Space Polyethylene (ASP)    |    84 - 88
Solid Teflon (ST)                        |    69
Air Space Teflon (AST)               |    85 - 90

More coax data can be found here.

Which schematic do you refer to, when you write this ?:
 

How does the AT PSU work from 12V AC / 17V rectified and smoothed DC from L4. Answer - energy drawn up from the earth ground.