The bifilar pancake coil at its resonant frequency

[synchro1]

Negative value:

Inductance in Henries is a measure of emptiness. How much volume is in a container? One gallon of volume would be a positive value of nothing, right?

Now, let's say we fill the gallon bottle half way; We can view the liquid as negative emptiness. Do you follow me so far?

We need to view the contents as inverse holding space to understand the meaning of the negative value.

It doesn't matter if it's A.C. or D.C.; The reluctance is the ratio of the "Magnetic Flux" in the circuit and the "Magnetomotive Force" or MMF.

We can see the "Negative Henry" value here in this equation:

L = 2*l*(log(4*l/d)-3/4)  (nH/m) (1)where, L = inductance of lead wire (nH/m) d = diameter of lead wire (cm)l = length of lead wire (cm)

"The Mystery of Inductance of Lead Wire We sometimes see "inductance of lead wire" in Electrical Engineering technical books. For example, the expression above is found in a book titled "Analytical Noise Mechanism" by CQ Publishing Co. at its 120th page".

Here's the Ampere to Gauss equivalency:

The SI base unit for electric current is the ampere. 1 ampere is equal to 1 coulomb/second, or 2997924536.84 electrons per gauss.

[synchro1]

@Tinman,


You're not the first tester to measure gain in Tesla's serial bifilar pancake coil. Cancellation of inductance is one feature,
storing spontaneously generated power in a magnetic field is another.


Try measuring the coils for inductance and see if you read a minus sign in front of the Henry? This negative inductance value will factor out to the same power gain in amperage.

[tinman]

Thanks for showing and doing Brad. Dont take it badly but I have some questions...

I understand that the ohms of the coils are very low and you cant get an accurate reading in them.

There may be some issue with how you are going about isolating said currents in the coils by way of the 100 ohm resistors.  Also, having a 100ohm resistor in between the middle connections may affect how the coils interact with each other , and probably and especially at the freq you are doing the tests.


1   How are we sure that the resistor current to that far left resistor is the actual current in the 1st coil next to it as a whole?  Like if the resistor in the middle of the circuit shows a different voltage across it than the far left resistor, I would expect some phase shift between coils is causing this, whether it be the inductance of the coils, self inductance as a whole, and or the capacitance, of which is probably altered severely with the 100ohm resistor in between the windings.

2   How is it that we can say that the currents of the middle resistor are a representation of the coil to the far right only? If there is phase shifting, that could foul up your calculations because we didnt actually look at the coils and how they are acting in the circuit in reference to each other. That would require 2 probes.

Maybe you can do a low ohm resistance in series with each coil just to do a voltage division with the coil and dc input to accurately calculate the resistance of each coil. Then you can eliminate the resistor, at the least the middle one, and put the probes across each coil. Both gnds of the probes in the middle of the coil and each probe at the opposite ends of the whole coil and invert one of the traces to compensate. Then you will be able to surely calculate the power dissipated in each coil because you would have the resistance value in check for each coil.

Im really glad you came up with what you have. Its different and new.  Maybe Im wrong to suggest what I have, and if so, please explain.

Mags

Mag's
Several proofs here.

1st-both TK ,and now Itsu,have confirmed a higher current value through R2 than R1.
2nd-power factor has no effect of the measured current through a resistor. Power dissipated by a resistor,and current flowing through a resistor,is measured by way of the voltage drop across that resistor-regardless of what the power factor is.
3rd-we confirmed the higher voltage value across R2,by way of lighting the LED,which would not light across L1.

So,this current through R2,is going into both coils,as we are using an AC current.
The value of this current is decreasing through each coil,the closer we get to the other end of each coil<--this is my best guess ATM,and will be looking for that tonight.


Brad

[hoptoad]

snip...
So,this current through R2,is going into both coils,as we are using an AC current.
The value of this current is decreasing through each coil,the closer we get to the other end of each coil<--this is my best guess ATM,and will be looking for that tonight.
Brad

Perhaps TK's recent video showing transmission line effects may also apply here.
https://www.youtube.com/watch?v=f4T5KKQjz0s
A focused standing wave produced ? ? ?
Cheers

[tinman]

Perhaps TK's recent video showing transmission line effects may also apply here.
https://www.youtube.com/watch?v=f4T5KKQjz0s
A focused standing wave produced ? ? ?
Cheers

Maybe
Or maybe we have added displacement current to that of the input current 

Check out the below pics of scope positions,and associated scope shot's
Look at the phase relationship in all 3 scope shots,for power factor correction.

Do the math 


Brad