Kapanadze Cousin - DALLY FREE ENERGY

[verpies]

I tried the various suggested triggering schemes, but none really worked.
So i have just my red probe across the 1 Ohm csr and triggered on that signal.
I used the new setup where the flyback diode is outside the measurement circuit.

I measured the current through the 1 Ohm csr for the 3 toroids, and also measured the current across a 10 Ohm base resistor (this 10 Ohm is in series with the both MOSFET driver resistors 1 and 4.7 Ohm resp.).
The current through this 10 Ohm resistor was 1.2A when the collector voltage was 150V.

Seems that the 2 new little toroids saturate even earlier.
All 3 where measured with the 6 turn side only.
Repetition freq. was 4.6Khz, pulse width 765nS

The 1200mA flowing into the base of the BJT was a little far off the expected 816mA. I think I calculated that current for a lower +V₁ voltage.  What was the +V₁ when you measured the base current across that 10Ω resistor ?

The inductor current waveforms look well. The flat portion of the waveform is due to the the transistor establishing a conduction limit at higher collector voltages or the flyback diode conducting.  I can't tell without seeing that signal from pin 8 of U3, simultaneously.
Yes, the new toroids saturate earlier (in 200-300ns) but this is good because that's closer to the optimal forward pumping time of the DSR diode.  The small toroid shows promise.

I really would like to see the failed triggering attempt from pin 8 of U3 through a pF capacitor, e.g. a the Ch2 waveform from the attached diagram.

I will elaborate tomorrow  in more detail.

[d3x0r]

The forward voltage between the base and emitter will always be between 0.5V an 0.7V.   
Even if you apply 1000V at one end of the base resistor, the other end of this resistor (the end attached to the base) will have only 0.5V to 0.7V on it (measured to the emitter).  If you forcefully exceed this 0.7V voltage, by e.g. applying the 1000V directly to the base, then the transistor will blow up.

Okay, while I understand by measurement that there will be a represented potential difference of 0.5-0.7, like across a diode, the flow is still from 12V....


or I guess really 12V is a representation of standing (potential) energy... and 12A is a representation of that same energy, but moving(kinetic?)  (giving a result of 1ohm that it's moving through)


if you have a small source positive voltage, once that starts moving; the voltage doesn't instantly drop, but if I shorted a capacitor with a diode, and measured it on a scope... the resulting standing voltage would be 0.5-0.7... and as the voltage is dropping, a voltage drop can be seen across a much smaller load (0.01) that would be proportionate to the current; except when there is no current, or removing the diode and using just a CSR across the cap, 12V=12A from 1uf in 1us...


and see this is where I wish I retained calculus 3, because that's some sort of curve, because in the first quarter (how do I make a micro-u?) us, it would be 8V @ 12A? not anymore? because it's only 8V, wouldn't it now only be 8A? and if I continue to work backwards would it ever be 12V@120A in some nano-pico second frame when initially opening(err closing as I should say in US) the current flow in the circuit.






hmm speaking of which can I just use a cap to trigger DSRD in a one-shot sort of mode?

[TinselKoala]

You have that trigger probe reference at +150V?  Careful... where are the other probe references connected?

[itsu]

The 1200mA flowing into the base of the BJT was a little far off the expected 816mA. I think I calculated that current for a lower +V₁ voltage.  What was the +V₁ when you measured the base current across that 10Ω resistor ?

+V1 was 12.5V during all my last tests.

I really would like to see the failed triggering attempt from pin 8 of U3 through a pF capacitor, e.g. a the Ch2 waveform from the attached diagram.

Ok, i missed that part of the 10KOhm resistor in the diagram and the pin 8 :-(, i  hooked up my ch2 probe tip (yellow) via 10pF to pin 13 of the nano-pulser without using the ground lead, therefor missing any reference point i guess.
This caused the ch1 (red) trace to move horizontally across the display while varying the collector voltage.

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).

Regards Itsu

[verpies]

You have that trigger probe reference at +150V?  Careful... where are the other probe references connected?

Both Ch1 and Ch2 probe's ground leads are connected to +150V when he is measuring across that CSR in the W1 path. He already found out the hard way what happens when they are not.
Fortunately his knobs are plastic