PhysicsProf Steven E. Jones circuit shows 8x overunity ?

[JouleSeeker]

Hi Dr. Jones,

      My take on this, FWIW, and I wrote this up earlier, is that the bifilar coil has
higher capacitance and therefore holds more charge at a give voltage drop
across it.  [snip for brevity sake]

      Regards,     Jim

  Interesting, Jim -- I will measure the Capacitance of the two coils, bifilar and single-wound, and let you know the result.    How much difference in capacitance C would you expect, to give such a large difference in observed B?   (approx.)

[jbignes5]

 Well if you make it like Tesla's pancake coil he said he could get 250,000 Time more capacity of a coil.

"relations with each other as to materially increase the self-induction.
I have found that in every coil there exists a certain relation between its self-induction and capacity that permits a current of given frequency and potential to pass through it with no other opposition than that of ohmic resistance, or, in other words, as though it possessed no self-induction. This is due to the mutual relations existing between the special character of the current and the self-induction and capacity of the coil, the latter quantity being just capable of neutralizing the self-induction for that frequency. It is well-known that the higher the frequency or potential difference of the current the smaller the capacity required to counteract the self-induction; hence, in any coil, however small the capacity, it may be sufficient for the purpose stated if the proper conditions in other respects be secured. In the ordinary coils the difference of potential between adjacent turns or spires is very small, so that while they are in a sense condensers, they possess but very small capacity and the relations between the two quantities, self-induction and capacity, are not such as under any ordinary conditions satisfy the requirements herein contemplated, because the capacity relatively to the self-induction is very small.
In order to attain my object and to properly increase the capacity of any given coil, I wind it in such way as to secure a greater difference of potential between its adjacent turns or convolutions, and since the energy stored in the coilâ€"considering the latter as a condenser, is proportionate to the square of the potential difference between its adjacent convolutions, it is evident that I may in this way secure by a proper disposition of these convolutions a greatly increased capacity for a given increase in potential difference between the turns."

But I think you need to make the coil like he designed and then parallel them or serial them per capacitance rules to get the desired results you are looking for. Doing the coil the way you did kinda ruins the results a bit since there has to be an order to the coil for the capacitance to build properly. This would mean that your coil would have much less capacitance then the way he did it.

[gyulasun]

   I finally made it to a small lab at the university and borrowed a Hall-probe to take magnetic-field measurements on two winding types, that we've discussed (above):
....
1.  Single-wound, 30 turns
2.  Bifilar-wound, total of 30 turns also.

So both have N = 30 turns and should (theoretically) have the same fields... now to compare the field strengths. 
....

Hi Steven,

Would like you to clarify for me because it is not a 100% clear for me from the photo of your coils. When you made the bifilar winding on the nail, did you wind 30 turns with the two pieces of parallel guided wires  OR did you wind only 15 turns and the 30 turns already include the 15 + 15 turns in series?
Because in case of 30 turns from the parallel guided wires already mean 30 + 30 turns when you connect them in series aiding.

Sorry for this question, just wish to understand the two kind of coils on the two nails (the angle of the nails in the photos do not readily let an easy visual comparison of the winding lengths to see the answer).

Thanks, Gyula

EDIT:  Just found your photo in Reply #785 in which the two windings on the two nails can be seen in 'a correct angle)  and now I think your bifilar winding has 15 + 15 turns i.e. 30 turns alltogether, just like the single winding on the other nail.

[xee2]

yes i will share..
these cores i bought.. i was going to test them first before i tell you guys about were the buy..
cause there fairly cheap.. so i am hoping they are what they say they are..
and if they are.. i got a few i might send to a couple ppl here at this forum..
i already have real good cores.. i just trying to find you guys and girls some nice toroids..

robbie

Thanks for the core. Video of 1.5uA Joule thief using the core you sent me >> http://www.youtube.com/watch?v=ZfMj4B7c0Ww

[albertouno]

Hi Professor and ALL;

I am new to the site, but am experimenting with Dr. Jone's circuit for 8X overunity.  Have tried several coils with the circuit, but so far no gain above unity.  Am waiting for the specified torroid ferrite core to be delivered so am compatable with his design.  I did notice a small steady state DC current being used by the circuit I have, which I assume is being accounted for, as well as the AC pulses centered around zero.   If I ignore the DC, I get the 8X gain, otherwise less than unity.  Am a bit frustrated by this so far, but will keep trying.  I have a EE background, so can follow most of the discussion.  Any help would be appreciated.