Nathan Stubblefield Earth battery/Self Generating Induction Coil Replications

[gyulasun]

Hi Jeanna,

I also think the 4 times as much inductance enhancement in case of bifilarly wound coils comes from the doubled number of turns (i.e. two times as long wire length). Look at this link
http://hyperphysics.phy-astr.gsu.edu/hbase/magnetic/indtor.html
where you can see the number of turns, N is squared in the nominator of the inductance formula so if you write 2N instead of N, the result is 4*(N squared) instead of (N squared).  This is the explanation.

rgds, Gyula

@gyula,
I also found the same numeric relationship between the inductance of the single parts and the full bifilar winding.
That is,
When measuring one of the filamants alone, I get a figure that is roughly 1/4 the amount of the entire inductance.
So, you get double your money back so to speak when using a center tapped bifilar on a toroid.
Xee2 pointed out that this is because you are dealing with N²turns rather than double.
I am not able to follow the reasoning on that formula yet, so I throw it out to you all for thoughts.

[gyulasun]

@gyula, thank you.

I'm try to set up a circuit to see what happens in real life.
DonL

Ok, but do not expect to find a real 200+ Henry inductance between the beginning and the other end, what you will find is some 10-30pF capacitance between those two wires...  what you may wish to check first in the capacitor measurement range lol 

rgds, Gyula

[the_big_m_in_ok]

deleted in afterthought

[t3t4]

@ DonL,

Probably won't know for sure if this turns out to be an easy way to get Henries until it's tested in a circuit.  Our meters could be doing something "wierd".  But you're welcome to test a bifilar wound toroid to see what your meter says.  I only found this to work with toroids.  Probably because the flux stays in the core of the toroid would be my guess at this point.

I don't believe anyone has mentioned yet, how exactly does a meter measure inductance? It sends out some AC voltage at a certain frequency, usually 1000HZ, but some meters are adjustable. If memory serves me well here, knowing the frequency and the voltage, you just have to find the resistance to calculate inductance. I think that's how the meter works, or something along those lines. But it does use a wave and voltage to extrapolate inductance. You can also use a computer based sound card.

Anyway, remember when I said that you may have found the beginning of the end. Well I meant it, and I hope you keep playing around with what you discovered. I have seen the same things, but I wasn't looking for inductance, you just found it in a different way. Point is, think about the Tesla coil "also" when you think about bi-filler coils.

And if you stand back and look at this picture you'll see the same setup as an aerial system...  antenna to capacitor to ground (neg. battery term.).  This is just a miniature aerial system.   

Yes sir, but thanks to all of you running these tests and talking about ideas, I'm beginning to see the aerial is almost irrelevant for extracting real usable power. The circuit is the aerial, or at least it can be.

I'm try to set up a circuit to see what happens in real life.

So am I, but something very very different. I'd just love to try and explain to you all what I'm talking about, but I can't. I'm not sure I understand myself, I can just kinda see it all working in my head. I'm not thinking electrically at all, but rather magnetically and mechanically, if that makes any sense.

t3t4

[xee2]

@ dllabarre

@ dllabarre

Well that is simple enough. I hooked one end of a 0.47 uF capacitor to the negative terminal of a 9 volt battery. I will check the voltage tomorrow.

After 12 hours I measured the capacitor while it was still attached to battery and it was about 0.10 volts. When I disconnected the capacitor from the battery and remeasured it the voltage was down to my voltmeter noise level of about 0.02 volts. I will try again with the antenna wire but that will have to wait because I will be using the 9 volts battery for some other things today.