Kapanadze Cousin - DALLY FREE ENERGY

[verpies]

... but always when I turn on my nano pulser there is not enough power to light the neons

That's not surprising.
We still have not seen a nice sawtooth waveform measured between points A and B.

Also, we still don't know the current-draw of the nano pulser.

[verpies]

I will stick to my MOSFET driver (MAX4420) for the time being.

ACID TEST: if you can obtain 100ns wide pulses with 25ns rise/fall times on the drains of your N-Ch MOSFETs driven by the MAX4420, then you should be fine. 

A 5MHz square wave would have those 100ns pulse widths, so this is not cosmic technology

[itsu]

ACID TEST: if you can obtain 100ns wide pulses with 25ns rise/fall times on the drains of your N-Ch MOSFETs driven by the MAX4420, then you should be fine.

I tested my nano-pulser using a MOSFET driver.
I have now a (on 12V) 100ns pulse using a 220pF cap. on the nano-pulser 74HCT00.
Video here: http://www.youtube.com/watch?v=olsr1m_DHKE&feature=youtu.be

Next step i did was hooking up a 2e PS to the drain of the MOSFET to see how it behaves on 200V.
However, hooking up a 2e PS to the drain (return lines of the both PS's connected) completely distorts the pulse coming from the MOSFET (lots of ringing / nasty pulses).
Even if i substitute the 12V from the drain by only 12V from yet another PS (my dual PS) its distorted.

I blew up both the MOSFET and the driver in the process.
Not sure why the pulse gets distorted, so need to find out.

Regards Itsu

[verpies]

Next step i did was hooking up a 2e PS to the drain of the MOSFET to see how it behaves on 200V.
However, hooking up a 2e PS to the drain (return lines of the both PS's connected) completely distorts the pulse coming from the MOSFET (lots of ringing / nasty pulses).
Even if i substitute the 12V from the drain by only 12V from yet another PS (my dual PS) its distorted.

This most likely happens because the wires from the power supply are too long and/or your 100Ω drain load resistor is inductive.
Long wires behave like coils.
When the MOSFET starts conducting, the Source to Drain current ramps up through that 100Ω load resistor you have in series. (the current ramps up linearly at first,  and later - asymptotically up to the V/R limit).  See here.
If your MOSFET can withstand the 200V/100Ω = 2A current limit and the Source-Drain path can withstand the voltage of 200V, then nothing bad can happen at this stage.

However, when the MOSFET stops conducting, the parasitic inductances of your resistors/wires will try to maintain that 2A current flowing in the same direction at all cost (even if it means increasing the voltage in this circuit to 10kV). 
Obviously your MOSFTET will not be able to handle that 10kV flyback pulse and will break down (likely taking its driver with itself).

The solution is to suppress the amplitude of this high voltage flyback spike by:
1) Minimizing the wire lengths between Ground, Source, Drain, the Load Resistor, and Vcc (think millimeters!)
2) Making sure the Drain Load Resistor is not inductive.
3) Putting good bypass capacitors across the Source and the Vcc, at the point where the Load Resistor is attached.
4) Providing a low impedance path for the flyback pulse:
    a) 1kΩ resistor in series with a HV 1nF capacitor, across the Source and the Drain (or across the Drain and Vcc)
    b) A high voltage Transil across the Source and Drain
    c) Recover the energy in that flyback pulse, just like we did with T2 a while ago
    d) Use the energy in that flyback pulse to energize the remainder of Dally's circuit (the primary of T1 and the diode in parallel with it)

P.S.
Please try to put a 10kΩ trimpot in series with a 47Ω resistor (R12) located next to C17 (the swappable 220pF capacitor of the U3 monostable multivibrator, that determines the 100ns pulse width now) and see how much you can adjust the pulse width using this trimpot.

Also, your 100ns pulse rise-time (actually off-time) is suspiciously long.
This has nothing to do with the operation of the U3 monostable, but most likely it is caused by the HV flyback pulse returning to the Gate of the MOSFET through the Drain-Gate capacitance (see: Miller Effect) and not allowing the MOSFET to turn-off quickly.  There are some better MOSFET drivers (such as the fast UCC27511) which have a higher sinking (8A) current than the sourcing current, to combat exactly this bad effect. However this problem should disappear once you get rid of the HV flyback pulse on the Drain, by one of the methods described in pt.4 above.

[Black_Bird]

@itsu

Probably the toroidal pulse transformer has a very low inductance and current is growing beyond expected in the drain. I had to increase the number of turns to avoid that. Had exactly this problem before.