Kapanadze Cousin - DALLY FREE ENERGY

[verpies]

When adding a 100 Ohm trimmer potmeter to the begin of the coax with the far end being shorted, it initially showed (collector voltage half way at 130V) the same signal as the "shorted coax" signal (pot halfway) but when turning a few turns the peak suddenly doubled so i stopped.
The potmeter measured to be in hundreds of KOhms now, so probably was fried, basically presenting an open (or high ohm) load.
Guess i need a somewhat sturdier potmeter instead of the trimmer pot used now.

There is always the time-consuming method of soldering series and parallel resistors instead of using the pot.
I was really counting on the results of this experiment (all reflections disappearing except the first one)

the 8 meter coax at 15KHz will not present much of an impedance transformation.

Most of the energy contained in this 15kHz train of pulses is not at 15kHz !
The SA will show you the truth

[itsu]

I used a range of fixed series resistors from 5, 12, 22, 32, 51, 68, 100 Ohm with the collector voltage on 130V.

See the attached .doc file for the screenshots, the first one is without any series resistor, so 0 Ohm.
Yellow signal is the HV probe across the DSR diode.

Itsu

[itsu]

I lowered the series LC circuit (inductor / wima caps) resonance by adding a 0.15 and a 0.1uF cap (total capacitance now  1.19uF) from 17.7 to 15.8KHz
to be in the range of my nano pulser repetition frequency.

I synced the nano-pulser to the Push pull driver (TL494) instead of the FG.

I scoped across the wima caps while in resonance (15.8KHz) to see what impact the nano pulse (1.5KV @ 12ns) would have on that signal.

The screenshot says it all, not very much!

Reversing the pulse on the coax (so pulse on outer shield) did not change that.

I will see if shifting the pulse compared to the sine wave (± 90°) has any effect.

Itsu

[Dog-One]

The screenshot says it all, not very much!

Darn, that's a bit depressing.  I was really hoping your much improved test fixture (over Dally's) would show us the way.

So we're not back all the way to square one, but we are certainly missing something.  Any ideas as to what?

[Zeitmaschine]

So we're not back all the way to square one, but we are certainly missing something.  Any ideas as to what?

Missing that Dally device was fake from day one perhaps? Why should one dismantle his working OU device three days after presentation without taking any measurements and never show something like it again?