Rosemary Ainslie Quantum Magazine Circuit COP > 17 Claims

[MarkE]

I'm sorry, but some of the above discussion from sims doesn't seem to jive completely with my results in the hardware. I know watching my demonstration videos gets old, but could you please watch again, and comment specifically upon, this video here, particularly "part 4b", the latter part of the video. Schematics are shown at the front of the video but also see the 4b schematic below.
The series resistance of 100 ohms with the bias battery is a carbon resistor. The CSR is a one-ohm wirewound power resistor.
So what I'm getting from the discussion above and from my testing is that the output impedance of the bias source is rather critical. If it's too low, as when I hooked the circuit up without the 100R briefly near the end of the video, it doesn't oscillate, but with a bit higher impedance (through the 100R and the bulb) it does. At 7:09 in the video I touch the bulb to the positive battery terminal bypassing the 100R, the bulb lights up brightly and the tpA trace shows -4 volts but with no oscillation. By fiddling with the connection I briefly get a pulse of oscillation, then I place the 100R in series and obtain the continuous oscillation and a dim bulb.
I presume the bulb lights up in the no-oscillation case because the mosfet's body Zener is reverse-biased enough to conduct, and that the two batteries are now in series and the scope trace from tpA is indicating the voltage drop across the body diode and the load resistance. Is that right?
In any case, due to the action of the body diode, the voltage at tpA never seems able to go below -4 volts or so, oscillating or not, regardless of the bias source impedance. Of course when the oscillations are happening this -4 V is the mean of the oscillations. Also, during oscillations there should be some current flowing across the source-gate capacitance as well, right?
I'm still trying to understand fully the behaviour of the circuit myself, so I'm happy for any and all guidance, and if I'm completely missing something please let me know!

http://www.youtube.com/watch?v=kV2ePEbJ76I

The videos do not contradict the discussion above.  What the simulations show is that if you connect a battery without a ballast resistor that you will not get the oscillations.  That should make intuitive sense:  That configuration looks like the drawing I posted.  One can look at the circuit as either common gate, or common source.  A common source circuit with 0V / 12V drive acts like a switch that is off with 0V and on with 12V drive.  Now if you insert 100uH between the battery and the MOSFET source then according to the simulation you'll get big time oscillations.  100uH is the equivalent of about 400 feet of lead wire.  If you insert only 10uH which would be about 40 feet of wire then the simulations do not show any oscillations.  The critical inductance to start and sustain oscillations for 20mOhms with four IRFPG50's appears to be right about 80uH.

In order to get oscillations we need two things:  180 degrees phase shift and gain greater than 1.  The discussion that PW and I were having had to do with getting a gain > 1.  For that, the MOSFET has to operate in its linear region.  When set-up as a switch it doesn't have a lot of opportunity to do that as it slews through its linear region pretty quickly.  However, when we insert enough inductance in the source leg, that impedes rapid on/off off/on switching, multiplying the time that the MOSFET takes to slew through its linear region, and in the process also introducing more phase shift.  It's just a matter of inserting enough unbypassed inductance and the circuit will take off if subjected to a strong transient such as power on.  The impact of a 50 Ohm or 100 Ohm degeneration resistor in series with the source is that linear operation extends to DC.  You should be able to do a quick test where you get the oscillations with the 100 Ohm resistor, but kill them by bypassing the resistor with a 1uF or larger capacitor.

During the oscillations there is current through all three parasitic capacitances:  D-G, D-S, and G-S.

[mrsean2k]

A formally attired Rosemary guides her team's build while typing up the thesis:


http://www.youtube.com/watch?v=CBBvXth-O_g

[TinselKoala]

MrSean2k.... I am afraid Ainslie doesn't need you to make a laughingstock of her... she is perfectly capable of doing that all by herself.

Sorry.  I omitted mention of preliminary tests done on efforts at replicating Deirone's test.  What has been managed is to 'briefly' turn the switch on.  The ground pin used is copper.  I've got an idea that it may be preferred to use aluminium.  But there's still some way to go.  Frankly - I'm AMAZED that even this was achieved.  It certainly defies standard assumption - or what I've learned about the standard model.  Frankly, it's looking promising - more so than I dared to hope.

Yes, that's right... the Deirones who plugs an extension cord into itself, then uses the piezo sparker from a cigarette lighter to "start" the thing up. Ainslie thinks she has managed "briefly" to turn the switch on... while splitting infinitives left and right. Now we know ... Ainslie actively hallucinates.


(Perhaps someone should inform Ainslie that the lower specific heat of Mineral Oil, 1.67 Joules per gram per degree C, and its lower density of about 0.83 or 0.84 grams per ml, means that a given amount of _energy_, measured in Joules, applied to the oil, will result in a _greater_ temperature change (measured in degrees C)  than the same amount of _energy_ applied to the same volume of water. This actually makes the oil bath system _more sensitive_ to applied energy than the water bath.)

[MarkE]

The idea that anyone takes Deirones farce seriously, much less claims to replicate pegs the absurdity meter.  Such a claim is either a big joke or the person making the claim is very, very confused.

[Tseak]

I'm delighted that Rose has proven this technology. My commissioning teams roll up extension cables and plug them into themselves to prevent them becoming knotted. All I have to do now is give the guys some lighters then they don't need to bother with carrying generators. How easy is that? However they'll have to unplug them during transport or the leads may cause a fire. In the meantime I'll get some aluminium  earth pins made up.