Quote from: TinselKoala on November 26, 2012, 11:01:55 PM
Meanwhile, for your amusement, here's a motor that _does_ run on lots and lots of voltage and not much current at all.
http://www.youtube.com/watch?v=vqf3bUL4YqE

That's such a nice video, just electrostatic energy powered machine, so nice and light. Compared to today's current driven machines they are like plums.


Fausto.

Quote from: TinselKoala on November 27, 2012, 12:13:36 AM
Then I won't jump in until MH has had a chance to answer.


Meanwhile, here's a quick video showing how Lawrence -- or anyone else who cares to -- can determine the actual resonant frequencies of his JT coils, out of circuit. In the circuit the resonant frequency will change depending on the load the coil sees. This method can also be used in-circuit by disconnecting the circuit's input to the coil and using the FG instead, and monitoring the output voltage with the output side of the circuit connected, I think. Or if the circuit's own oscillator can be swept in frequency, that is the very best way to do it: sweep frequencies until the output voltage peaks.


http://www.youtube.com/watch?v=y9ZN5QJZClY

Nice tip. I have not seen the video yet BUT the explanation is very very good. So you replace the signal that drives the Coil with an FG and look for the best output in voltage with the other probe?


Just like if I just put one coil with the FG and probe across coil input and look for the highest voltage pk-pk. The exact same thing but with yours I can do that on the circuit, right?


I must admit this is probably for the engineers a must have babe steps learning thing, but for me it has been very valuable to learn a little bit more today.

Fausto.

Quote from: gyulasun on November 27, 2012, 06:28:54 PM
Hi Fausto,

One question:  how would you utilize the higher flux if you had it from the longer wire?  Lenz law will react on it in the same way as it normally does, no?

Another thing: if you think of normal coil shapes (multilayer cylindrical), then the dynamic fluxchange would be different at switch-on, than for the case of the static case.  IF you wind a coil with X inductance from a certain wire diameter and "l" wire length and it would have say 3 Ohm DC resistance, and then you would wind a coil with a thicker wire and "10*l" wire length to get the same 3 Ohm DC resistance, it is obvious that this latter coil would have higher than X inductance and for a static case this latter would make a stronger electromagnet than the first coil, and DC input power would be same if you use the same DC source.  BUT the moment you start pulsing these coils, then their AC impedance is what counts and the second coil will surely have a higher AC impedance than the first.  So how do you think this?

Thanks, Gyula

Excellent questions.


I don't know really. I would think that Lenz law would still apply and therefore you will still have the problem of trying to "re-use" that field. Every time it will cause the reversed field and the story goes. So I guess longer wire coil no difference here.


Concerning the AC. I think I will answer with another question: What would be the possibility of not only creating a massive big coil that you can know or design with the correct wave length, so that one pulse will travel forward and return at the same moment you pulse again, or just right before or after, but just at the right "place" in the coil to cause for example a differential when one applies the next pulse?


Certainly a coil with very large inductance would be difficult to pulse at large frequencies. So motors with magnets is a picture that comes to my mind.


But more seriously, those are not high frequency coils so I guess what you are trying to build is of relevance here.


[size=78%]Fausto.[/size]

Quote from: TinselKoala on November 27, 2012, 09:11:40 PM
@Lawrence: I am so jealous.

It's clear that I have nothing to offer you and that you are far ahead of me in obtaining funding.

But I am far, FAR ahead of you in attaining what you would no doubt call "overunity" results.

Will you please inform your investors and your top University scientists that I have JTs that far outperform yours? I am ready to prove this contention at any time, and my devices are ready to be tested NOW. I'd rather work together with you than to compete with you...... but after all, a Platinum Visa card is quite a carrot.

(The only problem I see is that I am not prepared to claim that any of my devices are actually overunity.)

(By the way, I have heard of Google and I do know how to use it. When I ask you for a manual, I don't expect to be referred to Google; I think it would be courteous of you to provide an actual link, since I neither speak Chinese nor know just what model of Atten scope you have. But of course all that is moot now anyway. I found an Atten manual and it gave me some of the information I needed: the scope is NOT isolated from the mains ground and the probe references are connected together and to the chassis ground.)

I shall make sure the Investors and Top Universities know about your work and your help in the use of DC Coupling.  The Investors are looking for top experts.  They prefer to wait for the Top Universities to come out with definitive reports before pumping in serious funding.  Some of their advisers are betting and want to see me fall flat on my face.  There is some pressure on me but I am not rushing.


Repeat my experiments.  Use the necessary grounding and better DSOs.  Use your better prototypes.  One hint is to use the 2n3055, higher voltage capacitor, better resistors and toroids.  I am requesting many volunteers to do the same.  At the moment, the carrot is a nice meal with my Visa Card!

NickZ:

QuoteWe would use it to light bulbs brighter when using equal or less input. That is where the ferrite cores help to provide more output, from shorter wire or less turns, than when using the longer wire higher turn air cores, iron powder cores, etz...
  We are talking about Joule Thief type circuits here, not other mechanical devices.
  This is what we have seen in our experiments, and this is common knowledge even in basic electronics  transformer circuitry.
  I don't mean to butt in, but If this is all wrong... please explain.

A ferrite core will simply increase the inductance of the coil.  It will allow the coil to provide more output energy, as long as you provide it with more input energy.