Kapanadze Cousin - DALLY FREE ENERGY

[itsu]

Note that if the pulse shown by the red trace was representing the drain current then the polarity of that pulse would be the opposite.
In other words - the source-drain voltage pulse is inverted in respect to the drain current.

Right, so its better to talk about MOSFET turn-on and turn-off time instead of rise and fall times which would be reversed when looking at a voltage or current trace.

Regards itsu

[Hoppy]

Like Itsu said in his video when testing saturation using a transistor driver, I cannot see any sign of core saturation. it seems odd to me that despite Dally showing a heat sink in his schematic, he does not use one in the demo video. My transistor runs extremely hot without one in Dally's circuit configuration, unless I reduce the pulse width to reduce the current and in turn, power dissipation.

Regards
Hoppy

[conico]

@ verpies.

Yes it's the voltage trace on the point where the coaxial cable should be on a 47 ohm resistive load (I think the 47 ohm resistor it's winded so actually the load was much higher) Hoppy was right when he said that the pulse it will shrink even more when the load it's attached to last dsrd diode. Also my condenser at this point it's 1.5 nF (instead of 1 nF). There are many minor deviations from dally's design:

the ring has 6x5x3 dimensions
the avalanche diode it's not the KD203A it's a romanian model 25N10 rated 25 Amps 1000V.
i'm using a mosfet transistor and mosfet driver bettween the nanopulser and the mosfet.

In reality thirst test I was conducted was with only 9 turns on the scondary of the toroid (my main consern was not to distroy the osciloscope with high voltage) and the pulse was actually much wider, around 50ns or so, but i forgot to take a picture of that pulse. After adding 3 more turns you can see the result. The pulse was shrinked from 50 to 38-40 ns. I believe that my 1000V diodes has a higher capacitance then kd203a so I have to increase the voltage (both primary and secondary) to charge faster the capacitance and really go under 10ns pulse (I hope), or change both dsrd diodes, or a combination betwen this setups at least until I will have the KD203A. For the time being it's ok with me. Also using a pure rezistive load (or the coaxial cable conected may help ... will see)

Regarding your request it's hard for me at this point to do the measurements because I don't have full time access to that osciloscope. Will see when I can use it again.

Mihai

Salut,
What transistors did you used for nanopulser bipolar or mosfet?
What diagram did you follow?
Are you from Bucharest? If yes, I can help you with an osscilloscop.

[mihai.isteniuc]

Salut Conico,

What transistors did you used for nanopulser bipolar or mosfet?

At this point I'm using a mosfet: 11N90C (recovered from a PC power supply, like 90% of components I used). Between the nanogenerator and mosfet I have a mosfet driver: TC4420 (@all - be careful with this ones, because from 5 purchased only 2 where able to pulse at a very low duty cycle. Also a totem-pole home made configuration for driving correct the mosfet wasn't good at all at this low duty cycle of 20-50ns). I will replace this one (TC4420) with some compatible pin to pin version - improved one (producers claim). I think the code is MC 33152, and after that I have to see how the things will go. For the moment the nanopulser will be put on stand by because I have a big problem with the main power supply. When the frequency is varied the output changes also and big times: from 50-60volts @ 4khz (this is the lowest frequency for my TL494) up to 200volts @ 150Khz (depending also by the duty cycle). The TL494 can goes up 'til 200khz and at this frequency the voltage drops again. This is happening (I believe), because the ferrite transformer I'm using (also recovered from an PC power supply) it's probably optimized to work at this 150khz frequency.

So to answer to your second question:

What diagram did you follow?

'til recent I was going for the bipolar configuration of Dally's design, but ... I'm not sure right now. It is possible to change drastically the design. The Dally's green transformer maybe it's more linear then mine and can deliver a constant voltage across a wide frequency range.

Your third question:

Are you from Bucharest? If yes, I can help you with an osscilloscop.

I live near Bucharest. Give me a PM and will talk. As you can see in this moment I'm doing a "step back" and I'm trying to re-think the problem.

Mihai

[Сергей В.]

Variant of Nano-Pulser for Dally OU Generator by one of Realstrannik member 20 Amps in 10ns pulsewidth. Amplitude is 550V.

Also Nano-Pulse on LeCroy WaveRunner 1.1kV Nano-Pulse on 100ohm. Probe 1:10


to verpie: Sprint-Layout6 Full Cracked
http://depositfiles.com/files/afgn6ur6x

New link of Dally OU Generator on Realstrannik forum:
http://realstrannik.ru/forum/48-temy-freeenergylt-antanasa/89256-dally-ustanovka.html