Claimed OU circuit of Rosemary Ainslie

[MileHigh]

Aaron:

About "negative resistance":

http://en.wikipedia.org/wiki/Negative_resistance

I don't know if in the mosfet there is the same type
of negative resistance effect that violates ohms law
but there are non-linear zones exactly like this on
the irfpg50 depending on the settings. I'll show what
I mean in a video.

To clarify, they don't "violate" Ohm's Law.  They are non-linear devices that have a "dynamic resistance" that will vary according to the applied voltage or current, that's why they use the term "negative differential resistor."

In other words, you apply a voltage and measure the current and calculate the value of the resistance at that particular voltage.  Then if you apply a different voltage and measure the current then calculate the resistance and you will find that it yields a different value.  In both cases Ohm's Law applies and power is dissipated in the device.  The fact that the resistance changes with applied voltage is telling you that you are dealing with a non-linear device.

The same thing applies to diodes, if you look at a typical V-I plot for a diode you can see how it is another type of negative differential resistor where the higher the applied forward voltage, the less the resistance calculation for the diode.

"Violating" Ohm's Law sounds very cutting-edge and can be made to look like a "challenge" to "Classical" theory.  Ohm's Law is not violated and as the Wikipedia article shows, there are standard applications were the the property of negative differential resistance in certain devices is used to advantage.

MileHigh

[powercat]

TK update
TinselKoil 05c: Ring of Fire
http://www.youtube.com/watch?v=ZHms7tiIrrI&feature=channel_page

TinselKoil 04c: Full Power Sparks and Arcs
http://www.youtube.com/watch?v=6RDvylw7cBU&feature=channel
Quote from TK
The gap shown is 55 mm.
I finally seem to have stopped blowing mosfets, and I've installed some fans and buzzers to help me keep it that way.
I had several bad incidents over the weekend: One overheat under power that exploded a irf640 like a small gunshot, and another failure of an expensive irfpgsomething or other that wound up blowing all four of them as well as a couple sets of gate voltage regulating zeners. But I understand a lot more about troubleshooting the unit now!

I also got a nasty RF burn on my left index finger yesterday. Just a tad more and I'd probably lose the finger. As it is I've cooked a couple cc's of meat in my finger, and my body is just starting to realize it. It's a small wound but an ugly one, and I'm not sure just how bad it really is.

THIS IS NOT A TOY.
(Well, it is, really, but not one for the kiddies.)

There are several "screw the pooch" modes available for the careless or inexperienced. I at least know now not to touch the secondary while it's running, even down low. And the blue-white electric flame that I show here is HOT. I'm quite certain I could roast a weenie above it, no problem. And if the secondary isn't grounded or provided with a return, you can get the same flame at the BOTTOM of the resonator, and that can ruin your whole day.
Especially if the fire department turns your basement apartment into a swimming pool.

You can also get weird arcs and sparks from other, unconnected stuff, especially coils and whatnot. I'm continually checking for smoke and smells.

Fr=~820 kHz (sorry George Noory, and thanks); mosfets IRFP252 x 4 ; input 70 VDC at 2.5 amps (power arc) to 8+ amps (corona) so let's call it a half-kegger; that's quite a bit of power for a tabletop unit. I hope I don't get any visits from the MIBs. The gap shown is 55 mm.
========================
cat

[powercat]

Who needs fireworks 
TinselKoil 07c: All Your Zeppelin Blong Us Now
http://www.youtube.com/watch?v=XG2iEnWRRtA&feature=channel

TinselKoil 06c: Staccato Mode
http://www.youtube.com/watch?v=Cw5XhiNdTCs&feature=channel_page

cat

[MileHigh]

Powercat:

TK is simply ripping the fabric of space-time apart, all in a day's work. 

MileHigh

[MileHigh]

.99:

That integration curve is pretty neato.  That brute force integration must do a much better job than just eyeballing it!  The MOSFET resistive modeling and the 10-ohm resistor have to be coming into play here.  The MOSFET model is very impressive, and I assume that with a slow rise-time gate voltage waveform, you can measure the energy burned off in the MOSFET itself during the switching transitions.

I am pretty sure that all of this has been going on at the ASIC (Application Specific Integrated Circuit) level for many years now.  Same thing for PC motherboards and similar things.  For the ASICs they model the actual signals running on the die itself, to check for race conditions and impedance matches, spikes and reflections, etc.  In the 1980s, my time, ASICs where just designed graphically or with VHDL (had to pull that one from my memory, VHSIC (Very High Speed Integrated Circuits) hardware description language) where only limited attention was paid to the transmission line effects.  If the timing diagram checked out then chances are you were fine.  The clocks were 25-50 MHz in those days, and now they are in the GHz range.

That PSpice thing is just magic I tell you!  lol

Mama-mia, did you see the new Zune HD?  Those hardware and software engineers are totally amazing in what they can design these days, don't you think?  Absolutely unbelievably amazing.  The Zune HD is science fiction come true in real life.

We also now have these new LED billboards on the highways now that are finally "real."  They look fine on sunny days, not washed out.  The colour range and contrast allow them to put up pretty respectable looking photographs.  It is Blade Runner technology that has officially arrived.  One more time, all credit goes to those amazing semiconductor engineers at work on continually advancing the state of the art for LED technology.

MileHigh