Here are some real numbers:

Frequency of oscillations in the NERD circuit: around 1.43 MHz
reference: Ainslie Paper 1, Figure 4

Intrinsic input capacitance of a _single_ IRFPG50 mosfet: 2800 pF to well over 4000 pF depending on D-S voltage, but at Ainslie voltages 2800 pF
reference: IRFPG50 data sheet, Figure 5: Typical Capacitance vs. Drain-to-Source voltage

Capacitances in parallel _add_, so 4 mosfets in parallel could easily have 16000 pF, or 16nF, or 0.016 uF, input capacitance or even more if the supply voltage is low, but at the Ainslie voltages it will be 2800 pF x 4 or a little over 11000 pF.
reference: any bright tenth-grader
http://www.electronics-tutorials.ws/capacitor/cap_6.html

Quote from: MileHigh on June 18, 2013, 08:00:12 PM
I have to jump in to point this out.

Guess who:

Oh my God the sleaze factor is so gross.  How things can get so topsy-turvy in the creepy little world of Rosie Posie is beyond me.  I have seen her trash good skilled people over and over again.  It's simply disgusting.

Then we have a kind of concession juxtaposed with Club Wackadoo oozing more woo:

Quoteeven a blown MOSFET at Q1 should be investigated as a possible source of energy.

And this woman claims that she has a "team" behind her backing her up, "They're professionals and - to a man - rely on their skills to earn their living."

She's apparently amazed that people actually do earn their living by relying on their skills, rather than by sitting on their asses spouting ignorant BS all day like she does.

Quote

Well, I hope that they are reading here.  I hope over the next few weeks this nonsense gets swatted like a bug and never comes back.  I am so sick of it.

Unlikely.... non-existent people don't read forums or blogs, they are too busy relying on their skills to earn a living.

Quote

MileHigh

Quoting Genesis (the musical group):

There's something solid forming in the air,
The wall of death is lowered in Times Square.
No-one seems to care,
They carry on as if nothing was there.
The wind is blowing harder now,
Blowing dust into my eyes.
The dust settles on my skin,
Making a crust I cannot move in
And I'm hovering like a fly............. waiting for the windshield on the freeway.

Where does she find these "professionals" who "to a man - rely on their skills to earn their living"?  Could anyone else find a single knowledgeable person who could read her daft manuscripts and not see all the problems, even without knowing the history and the "back story" told in her blog and forum posts?

It's hilarious the way she demands to know personal identities of people like me, PW and so on, when she's so afraid of anyone finding out who "her professionals" are.

She still cannot produce a single qualified individual to stand beside her and state that her experimental results, like Figure 3, are correct and valid.

------------------------------------
"A Joule is a Watt, the terms are interchangeable."
"There is no such animal as inductive reactance."
"Even a blown MOSFET at Q1 should be investigated as a possible source of energy." -- Rosemary Ainslie

Quote from: TinselKoala on June 18, 2013, 08:51:04 PM
Here are some real numbers:

Frequency of oscillations in the NERD circuit: around 1.43 MHz
reference: Ainslie Paper 1, Figure 4

Intrinsic input capacitance of a _single_ IRFPG50 mosfet: 2800 pF to well over 4000 pF depending on D-S voltage, but at Ainslie voltages 2800 pF
reference: IRFPG50 data sheet, Figure 5: Typical Capacitance vs. Drain-to-Source voltage

Capacitances in parallel _add_, so 4 mosfets in parallel could easily have 16000 pF, or 16nF, or 0.016 uF, input capacitance or even more if the supply voltage is low, but at the Ainslie voltages it will be 2800 pF x 4 or a little over 11000 pF.
reference: any bright tenth-grader
http://www.electronics-tutorials.ws/capacitor/cap_6.html

TK,

Keep in mind that the 1.43MHz you cite is merely the trigger frequency.  The waveforms are not pure sine waves and therefore contain additional harmonics.  This was brought up when the proper correction factors for the CSR inductance were being discussed.  Recall that I mentioned that she could switch her scope to an FFT display of her waveforms to show their true frequency content when she scoffed at the idea that there was energy contained within the waveforms out to several megacycles or more.

Also keep in mind that the MOSFET capacitances are dynamic and vary with Vds.  When Vds approaches zero during the oscillations,which it does, the MOSFET capacitances increase dramatically.  As well, when Vgs is at its greatest, the MOSFET capacitances are at their lowest.

The values you cite are likely a fair average.  But just as your video and the math involved shows, there is a sufficiently low impedance path through the MOSFET capacitances at the frequencies involved to pass the observed AC current.

PW

Have finished the build and ran a few preliminary tests. Will post results over the next several days.

Here are a few pics of the setup. It ain't pretty, but that's what makes it work so good. 

Quote from: poynt99 on June 18, 2013, 10:02:16 PM
Have finished the build and ran a few preliminary tests. Will post results over the next several days.

Here are a few pics of the setup. It ain't pretty, but that's what makes it work so good. 

Looking good.  I can still smell the "new" on your scope!

PW