Kapanadze Cousin - DALLY FREE ENERGY

[mihai.isteniuc]

Hello verpies, ПРИВЕТ Сергей В

@verpies

Can I ask you to share some tech info regarding the first driver from #947 post?
1st - what was the gauge of the wire used by you for the coils
2nd - the number of turns
3rd - diameter of the former
4th - have you used any ferrite cores and if so what type?
5th - what was the supply on L1?

6th - any other information that you will find useful it's welcomed.

Also I would like to ask you if you can do a small test for me: if you replace the kd204 diode with let's say 1n5408 (if you have any) what are the best results?

For me with 24 volts supply on L1, L1=L2 10 turns, with 0,3 mm wire (european standard), with 4mm former and 12nF for C2 the best result using an 1n5408 diode was 9ns wide pulse and 300V peak.

I'm curious if you can do better. This way I will know (with some degree of incertitude) if I can do better and need more testing or I need a russian diode (kd20x...) and things will become better. If I can obtain 5ns with 600-800 volts peak and I can go up with PRF without significant loses I have achieved my goal.

@Сергей В

Thank you for the info supplied to us. I will study your new info and try to apply some on my circuit and see if I can improve the results.

Thanks to all.

@itsu keep up the experimenting and maybe the lights will come up .

I have a suggestion. If you want to pulse L1 with 150V at any desired frequency why don't you try to create a 3rd oscillator with the exact specification from Dally plans (regarding PRF and PWM) and use it in series connection with L1 and the 150 Volts supply. This way you will not be concern anymore about the working frequency of your supply and the voltage that comes out from it (see the attached schematic)

Mihai

[itsu]

Itsunadze привет

No news from Dally like he was disappeared in earth, but somebody has wrote in Dally blog and informed all that he have success.

Сергей В.

Thanks for the update, however, i am not sure what to think about this.
This does not really help as we still do not know the base and nano-pulse repetition frequencies in use.
Hopefully some more info will follow.

Regards Itsu

[itsu]

Mihai,

L3 has a greater influence over the entire coil if the nanopulser it's connected over the shield of coaxial cable.

I too found that, even so that i can not measure the nano-pulse with my HV probe as my scope goes crazy.
But it think that is normal as the pulse is now on the shielding and not "shielded" anymore.
It did not show any different voltage/signal on the L1, L2 or L4 coils (same base sign wave with spikes ontop).

Also my 400v capacitor connected in parallel with L2 has been melted during this tests

Wow, my L2 resonanting cap gets warmer with increasing frequency so that it feels "warm" when using a 100nF cap at 13Khz. It does not differ when pulsing the inner or outer coax leads.

Nothing from what I have tested can go under 9-10ns.

Be aware the my HV probe says in the specifications its minimum fall (and probably rise) time = 7nS.
So i don't expect to see any pulses go below this.

PS My driver for the nanopulser it's looking like the 3rd attachment. Any comment will be welcomed.

My pulser circuit also looks like that as i also toke it from that forum.
Its a KD226D with a 9nF/3000V ceramic cap in series with the CATHODE (like that drawing, so NOT as the Dally circuit), but without the resistors.  Instead i only have hooked up the (shorted) 50 Ohm coax cable across the dsrd (like the Dally circuit).

Presently my toroid is the 10x6x4 one, so former is 4mm.
Wire is 0.28mm teflon isolated
L1 = 4 turns,  L2 = 12 turns
Best result was with a KD226D diode at 120V at 4.2Khz repetition frequency: 1500V / 12nS.

The 1N5408's never got near that.

@itsu keep up the experimenting and maybe the lights will come up .

I have a suggestion..........

I have no problems with pulsing the L1 coil. It runs ok by the inverter and i peak it on the resonance frequency determined by the LC combination of L2/C2 (presently 1uF = 4.2Khz)
But thanks anyway for the suggestion :-)

Regards Itsu

[mihai.isteniuc]

Be aware the my HV probe says in the specifications its minimum fall (and probably rise) time = 7nS.
So i don't expect to see any pulses go below this.

Well I don't know how to find a way to say this: in my stupidy I forgot to check this "small" detail. I have 3 probes at home and I totally forgot about this. THANK YOU for reminding me about something I should have done long time ago. In fact I wanted to check but some other things switched my attention, then I forgot .... and I don't have a HV probe (yet). All my measurements are done on a resistive divisor with combinated resistance of 50 ohms.

The 1N5408's never got near that.

The results after testing are so confusing ... 1N5408 it's one of my best diode, UF5408 it's rubish, 1N5406 are so-so (but don't take this affirmations as postulates; the results are different from one manufacturer to another, you still have to test this for yourself. I still wanna test some MURS360 as a last solution, but first I need to see the rise and fall time for that probes. The 9-10ns are a barrier to me. There is a good chance to be under that barrier for quite some time and don't even know it 

I have no problems with pulsing the L1 coil. It runs ok by the inverter and i peak it on the resonance frequency determined by the LC combination of L2/C2 (presently 1uF = 4.2Khz)
But thanks anyway for the suggestion :-)

Sorry. I think I was misinterpretated one of your post. For me it's a problem because my inverter output voltage it's very dependent by PRF and also PWM, and this was the only logical solution to overcame this dependency.

Mihai

[mihai.isteniuc]

@verpies.

What do you think about the configuration from attachement?

Small description (as I see it): 10ns@1kv pulse travels to coaxial (50 ohms) cable. At the intersection there are 2 small coaxial cables with lengh L=0.2 'til 1 meter (the value should be determined by calculations or by testing) and then forwards to the 50 ohms load. How the pulse will look like at that resistor if we presume that the time taken for the pulse to travel up and down through the small coaxial cables it's under the 10ns period of time (they virtually travel the 2L distance under 10ns aka they re-join initial pulse). 2 cases: one with the small coaxial cables shorted and one with open end.

Thank's in advance.

Mihai

PS The ideea it isn't mine and I'm curios the way you see it, and if it can be applied somehow to our quest.

Mihai