The bifilar pancake coil at its resonant frequency

[TinselKoala]

"The Tesla bifilar winding just has more interturn capacitance and so needs less external capacitance to make the LC circuit resonate at a given frequency"

TK isn't that a special property of pancake coil in relation to others coils ? It seems to me that is one special property isn't  ? 

Yes, that is a "special property" not only of "pancake coil" but of the Tesla Bifilar winding, whether flat or solenoidal, and I have never said it isn't. It is the heart of Tesla's patent 512340, after all. I have explained how this is useful, or was useful in Tesla's day. But that doesn't make the coil magic. Yet people still attribute all kinds of other special properties to it, which it does not in fact have.

"IN EVERY COIL".... that "special property" of cancellation of self-inductance at a particular voltage and frequency is a property of EVERY coil. Yet people say that the Tesla Bifilar pancake coil winding is "special" because of this property that EVERY coil has. Perhaps you are not one of those people, but some of the people commenting here certainly are.

Now, the _flat_ or "pancake" coil does have one other "special" property, no matter if it is Single wound or Tesla Bifilar: When used as the primary of an air-core resonating transformer, it allows the builder to get the outermost turns (corresponding to the upper turns of a solenoidal coil) a good distance away from the secondary, and this is advantageous for two reasons. First, it lessens the chance of high-voltage flashover between the secondary resonator and the primary, which can be dangerous to equipment and personnel. Second, it "loosens" the magnetic coupling coefficient between the two coils, which allows the resonator to "ring" more freely when it gets a pulse from the primary.

Meanwhile.... note the Tesla Bifilar primary on my little mini-sstc here:

[MileHigh]

Where you see i say that pancake coil has no self induction MH ?

I say :

"the father of pancake coils say exactly that "it possessed no self-induction" only need find the right frequency to that happens ."

Are you blind you are you try manipulate  what i wrote ?

You said this:

<<< Yes Evostars , the father of pancake coils  say exactly that "it possessed no self-induction"  only need find the right frequency to that happens , and seems is that that some really don't agree  , and that is the reason to the compass not show any deflection even when  drive a load , not by the high frequency like someone say .  >>>

And I requoted it as this:

<<< (No self induction) is the reason to the compass not show any deflection even when  drive a load , not by the high frequency like someone say>>>

You are saying the pancake coil has no self-induction at resonance which results in the compass needle not deflecting.  There is no manipulation there at all.  Perhaps it is related to language for you since English is your third language?   Why are you still in confrontational mode?

MH Is you logic not mine a logic of someone very dirty  but not surprise me i already saw that same behavior in other occasions.

Did you read what I said to you before?  <<<And in this thread I have read many really nasty and ugly ad hominem attacks from you against me.>>>  If you can't stop the ad hominem attacks then you should leave this thread.

MH You write that not me . Did i wrote  that not produce magnetic field ?  show me please where i wrote that .

I used the speculative word "seems."  <<< Your logic seems to be this...>>>  I am not saying that you definitively stated that the coil does not produce a magnetic field.

If you agree that the coil produces a magnetic field, then what is your explanation for the compass needles not deflecting in your video?

real sad real sad .

One more time:  No more ad hominem attacks.  Discuss the technical points only.

MileHigh

[web000x]

@evostars,


What are the measured LC values and wire gauge for your bifilar coils?  I'd also be interested in the read out of a capacitance meter connected to one leg of each coil while the coils are not connected on the far end.  I am curious if the similar orientation of the dielectric field in the pancake coil produces a stronger capacitance vs a bifilar solenoid.  Dollard seemed to think the planetary alignments had a more profound impact on electrical phenomena because of the dielectric flux orientation between them so this test stands to reason... 


Dave


PS @Efinder, thanks

[Zephir]

this might be the third time I will ask you:  What are the special properties of the pancake coil?

The pancake coil has the evanescent scalar wave phenomena enhanced - whereas the normal inductors have them suppressed. The tunneling of EM wave through evanescent field runs with superluminal speed, whereas EM wave in classical circuits always propagates with speed of light or lower. The overunity is extradimensional, normal causality violating effect in essence and the normal spreading of EM waves along conductors cannot achieve it.

the _flat_ or "pancake" coil does have one other "special" property, no matter if it is Single wound or Tesla Bifilar

The bifilar coil collect the A-field component of magnetic field, which isn't detectable with normal coil around torus (Aharamov-Bohm effect). Even at the case, when normal coil is used, then some magnetic field leaks from toroid, because it's coil represents one loop of winding by itself. Once the bifiliar coil doesn't induce the back-EMF voltage and magnetic flux into the circuit, then all energy collected on such a coil must be redundant and as such overunity. The conclusion therefore is, that the every bifilar coil wound around standard Joule-Thief oscillator winding should collect portion of its energy for free.

IMO the MileHigh/TinselKoala should get banned from this site, as their long-term agenda contradicts the very purpose of this forum: the research and spreading the overunity technology. In my experience just a few dedicated trolls like these two ones (note their posts count) can disrupt the constructive atmosphere of the whole forum. You cannot achieve the understanding of overunity with using of laws, principles and concepts, which are itself based on energy conservation law - to pretend otherwise would be just an oxymoron. The raising such laws, concepts and principles therefore doesn't and cannot ad nothing into discussion. You can be very educated / experienced in it, but just this education would prohibit you in understanding, why and how the overunity is working. We don't need explanations, why overunity is impossible - every textbooks and Wikipedia contains more than enough of this propaganda. We all did come to this site not because we don't know, that the overunity shouldn't work - but just because of it: we perceive it as a scientific anomaly.

[evostars]

@evostars,


What are the measured LC values and wire gauge for your bifilar coils?  I'd also be interested in the read out of a capacitance meter connected to one leg of each coil while the coils are not connected on the far end.  I am curious if the similar orientation of the dielectric field in the pancake coil produces a stronger capacitance vs a bifilar solenoid.  Dollard seemed to think the planetary alignments had a more profound impact on electrical phenomena because of the dielectric flux orientation between them so this test stands to reason... 


Dave


PS @Efinder, thanks

top coil (of 3 stacked coils,  center pulsed,  top bottom series connected) :  70 turns, 1.78 nF  0.51mH
bottom coil 0.47mH   1,72nF (coil tuned to topcoil, by adding 2x 50pF in parallel, so both resonate at the same frequency)
center coil (tighterwound)  2,58 nF 0.57mH

capacitance was measured by disconnecting the 2 windings (what i call "bridge")
my lcr meter is a very cheap chinese CA-4070L.

Edit: I havent done your reading yet, with 2  coils stacked, but not connected, and then one lead of each coil to measure capacitance.
The wire gauge, I dont know. the diameter including enamal coating is around 0.8mm. they are hand wound on cd sleeves with 70 turns total (2x35)

edit2: done the measurement. around 47pF between the top and bottom coil (without the center coil) not series connected,
again, a poor reading from a cheap LCR meter.