Kapanadze Cousin - DALLY FREE ENERGY

[T-1000]

Sorry guys for offtopic, there are important news today:


http://www.energeticforum.com/renewable-energy/4864-donald-smith-devices-too-good-true-258.html#post213894


http://www.youtube.com/watch?v=mzE-p0GJb_Q&feature=em-unknown

[verpies]

External triggering also failed to trigger because of that, and TK's suggestion on using differential probing does not work due to the poor math functionality of my scope.
I will try to test again tonight/weekend, putting both probes ground leads to +V2 (150V).

Yes, I remember the math problems of this scope (It multiplies pixels in the display instead of the raw ADC samples)

I think, it is worth putting the effort into getting a safe and decent trigger signal for the scope, because in a moment that will become very important for the tunning of the DSR diode.
I hope the simple pF capacitor scheme works with your scope, however the scheme with the trigger isolation transformer (TT) is better and safer.

P.S.
The TT is not critical as long as the primary winding has as many turns as possible and for best isolation properties the primary and secondary windings should not touch each other (each one wound on its own half of the core).
Also, note that lately I improved the wiring of U3 to make it faster. The extraneous inputs (pins 3, 9, 12) are grounded instead of loading the gate outputs unnecessarily.

[TinselKoala]

Hmmmm..... Pin 8 is actually an input, of course, so you are really triggering on the output at Pin 4, which is the first gate after the raw input from the oscillator at pin 2. So why not just trigger on the oscillator output directly at pin 2, and use the scope's delay function to bring  the output nanopulse from the 7402 onto the screen?
Is it a problem of different "ground" references?

[verpies]

Hmmmm..... Pin 8 is actually an input, of course, so you are really triggering on the output at Pin 4, which is the first gate after the raw input from the oscillator at pin 2. So why not just trigger on the oscillator output directly at pin 2, and use the scope's delay function to bring  the output nanopulse from the 7402 onto the screen?
Is it a problem of different "ground" references?

Yes, of course that diagram depicts a signal taken from pin 4 of U3.  I mentioned the connected pin 8 only because it is easy to get at (at the corner of the IC) without accidentally shorting the surrounding pins.

Yes, the scope can also be triggered with one of the outputs of the U2 astable. 
The disadvantage of that choice is harder triggering at the point in time when the Power Switch (the BJT or MOSFET) stops conducting, because the falling edge of the base/gate signal is dependent on the position of the pot P3. 
It would be inconvenient to adjust the scope's trigger delay on the base/gate rising edge to match the pulse width as P3 is varied.

[TinselKoala]

OK, understood,  that's fine.
So you are elevating the trigger reference to +150 volts because of the need to have the other scope probe references also at +150?

I think it's better to use the trigger transformer scheme.
Sorry, I don't want to confuse this excellent tech discussion, I'm trying to follow along as best as I can.