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Author Topic: The bifilar pancake coil at its resonant frequency  (Read 563268 times)

MileHigh

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Re: The bifilar pancake coil at its resonant frequency
« Reply #75 on: March 25, 2017, 08:48:28 PM »
Nelson:

Quote
Myself already answer about that point but i answer again :
Self induction of coil will be zero.  In a pancake bifilar coil  the magnetic field of one of winding is  equal and opposite to that created by the other wind canceling their self inductance.

No, in fact the self-induction of the coil will not be zero in a bifilar pancake coil.   The magnetic fields of each of the windings add together.  The currents in each of the two windings travel in the same direction.  At lower frequencies a bifilar pancake coil and a regular pancake coil will look exactly the same.

Quote
Sorry but i don’t agree about that point that regular solenoid have a more efficient coupling in power transfer , and even with less wire , resistance and self-capacitance . You should test before talk otherwise you are just talking something that someone write and you assume that true is unbreakable.

In a certain sense I suppose that we are both in the same position then, aren't we?  You are talking before testing also, aren't you?  So why do you disagree with me?

A pancake coil exhibits a substantial amount of magnetic field self cancellation where part of the magnetic field generated by one loop of wire is cancelled out by part of the magnetic field of the adjacent loops of wire.  A long solenoid coil will also do this but a solenoid coil that is shorter in length compared to the diameter will exhibit much less magnetic field self-cancellation resulting in a higher inductance per unit length of wire.  The center of a short solenoid coil is almost a pure area of flux addition with no cancellation.  Therefore if you place two short solenoid coils face-to-face you have a very good coupling of flux from one coil to the other coil with very little flux self-cancellation.  It's a no-brainer that two short solenoid coils will couple better together as an air-core transformer than two pancake coils.

Quote
Sure i understand , that point and i did not say that is the best option or not , just tell that is possible with a square wave find the self -resonant frequency of the coil in same way.

Yes it is possible to find the resonant frequency of a coil with a square wave excitation but it is also very possible to make a mistake using this method.  What I am not hearing from you is why there is a problem with a square wave and why the proper way to do it is with a sine wave.  Do you know the reasons?  I see no discussion about this critical issue.

Quote
Now you are start acting a bit more weird  … what peers are you referring ?  About you say that are viewing more deeply than me , for sure not , go to bench and test it is easy and after you can show us .
OHHH i forget ! You don’t need you already answer that in last email your “peers” already did that no chance of that “peers” fail.

What is so strange about saying that your peers are the people in this thread and on this forum?  If you are viewing more deeply than me explain yourself please.  Test what on the bench?

Quote
I don't think that coil is special , i guarantee that is real special because i already test it, otherwise why should i use in my  work ? . Should i demonstrate to whom?

Why don't you share your information right here with your peers?  What is real special about a pancake coil?

Quote
otherwise you are just throw away words like a parrot

Nope, I am not throwing away words like a parrot.  I am raising serious issues for consideration and asking for substantive information.  It's too easy to convince yourself that you are in some "magical bifilar pancake coil club."  I am looking for real substance.  This is a way to induce you to think critically about what you are doing and ask yourselves about the merits of your testing and about the merits of different coil configurations.  Just because Tesla issued a patent for a bifilar pancake coil does not make it "magic."  Do you see what I am saying?

MileHigh

MileHigh

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Re: The bifilar pancake coil at its resonant frequency
« Reply #76 on: March 25, 2017, 08:57:50 PM »
+1
opening our minds, requires opening our hearts

Speaking of opening your mind, do you actually know how a coil works?  It's fun to play with them but I can tell you that more than 95% of experimenters on places like this don't know how coils actually work.  It's a strange phenomenon and I can tell you that you would be much better off to understand how a coil works first in order to get more out of your experiments.  If you are beginner it is not an easy subject to tackle.  In many ways the way coils work are counter-intuitive and it can be a difficult subject to understand.  That's why Bedini never explained how coils work to his followers at the various conferences he was part of.  He was better off leaving the whole subject shrouded in mystery.

MileHigh

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Re: The bifilar pancake coil at its resonant frequency
« Reply #77 on: March 25, 2017, 09:13:00 PM »
https://www.youtube.com/watch?v=uiLgM3EkQBE
With this bifilar pancake coil i can charge the 12 v battery without magnet rotor, can you describe this experiment...?

Jorge, I looked at your clip.  It's just a variation on when you have a Bedini motor where the rotor does not turn and the Bedini circuit goes into spontaneous self-oscillation.  You have an oscillating circuit that is energizing the pancake coils and then the pancake coils discharge into the battery when the transistors switch off.  Exactly the same circuit could be built and demonstrated with an ordinary coil.

MileHigh

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Re: The bifilar pancake coil at its resonant frequency
« Reply #78 on: March 25, 2017, 09:27:27 PM »
Nice experiment, and a nice stack of pancake coils!

I've been wondering about charging a battery with the dielectric resonant voltage. Thanks for showing that it works.

Have you noticed a difference, in how the coil is connected? I noticed, north is stronger. Why do you not use 2 diodes, to create a plus and minus from the resonant sine wave?

really cool to hear it buzzing with the magnet on top. I hear my coils buzzing sometimes, when I load them unbalanced.

A little reality check for you Evostars.  The battery is not being charged with a "dielectric resonant voltage."  I don't even know what that means.  The battery is being charged with current pulses from the coil.  It's very plain and ordinary.  In Jorge's circuit it would not make sense to have two diodes at all, the current to charge the battery flows in one direction only and you only need one diode.  There is no "resonant sine wave."  Nothing in that circuit is resonating in the true sense of the word, rather, the circuit is oscillating.  There is a difference between "resonating" and "oscillating."  For example, when a 555 timer circuit outputs a square wave signal, nothing in the 555 timer circuit is resonating.  Rather, the 555 timer circuit is oscillating as a "bistable multivibrator."  That is somewhat analogous to what is happening in Jorge's circuit.

What is the coil actually doing in this circuit?  It's being energized when the transistors switch on.  When the transistors switch off, the coll discharges into the battery.  There is no sine wave or resonance in sight.

This is just me giving you an example of why you should learn how a coil actually works to get more out of your experiments.  It's all up to you.

nelsonrochaa

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Re: The bifilar pancake coil at its resonant frequency
« Reply #79 on: March 25, 2017, 11:24:22 PM »
Nelson:

No, in fact the self-induction of the coil will not be zero in a bifilar pancake coil.   The magnetic fields of each of the windings add together.  The currents in each of the two windings travel in the same direction.  At lower frequencies a bifilar pancake coil and a regular pancake coil will look exactly the same.

In a certain sense I suppose that we are both in the same position then, aren't we?  You are talking before testing also, aren't you?  So why do you disagree with me?

A pancake coil exhibits a substantial amount of magnetic field self cancellation where part of the magnetic field generated by one loop of wire is cancelled out by part of the magnetic field of the adjacent loops of wire.  A long solenoid coil will also do this but a solenoid coil that is shorter in length compared to the diameter will exhibit much less magnetic field self-cancellation resulting in a higher inductance per unit length of wire.  The center of a short solenoid coil is almost a pure area of flux addition with no cancellation.  Therefore if you place two short solenoid coils face-to-face you have a very good coupling of flux from one coil to the other coil with very little flux self-cancellation.  It's a no-brainer that two short solenoid coils will couple better together as an air-core transformer than two pancake coils.

Yes it is possible to find the resonant frequency of a coil with a square wave excitation but it is also very possible to make a mistake using this method.  What I am not hearing from you is why there is a problem with a square wave and why the proper way to do it is with a sine wave.  Do you know the reasons?  I see no discussion about this critical issue.

What is so strange about saying that your peers are the people in this thread and on this forum?  If you are viewing more deeply than me explain yourself please.  Test what on the bench?

Why don't you share your information right here with your peers?  What is real special about a pancake coil?

Nope, I am not throwing away words like a parrot.  I am raising serious issues for consideration and asking for substantive information.  It's too easy to convince yourself that you are in some "magical bifilar pancake coil club."  I am looking for real substance.  This is a way to induce you to think critically about what you are doing and ask yourselves about the merits of your testing and about the merits of different coil configurations.  Just because Tesla issued a patent for a bifilar pancake coil does not make it "magic."  Do you see what I am saying?

MileHigh

Sorry, MH but nothing that i could say will change your position , and i can only accept your opinion, but you will not listen to what you want listen.
About you say that we are both in the same position , that statement  are Miles away from the true because you are just a more theoretical person , and you knowledge is based not in practical work itself  but only in lecture . Are you a researcher ? Can you point to me or to others where i could find some of your experiments in last years ? I will appreciate that you could provide to us some of that work , sincerely.

Nelson Rocha

MileHigh

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Re: The bifilar pancake coil at its resonant frequency
« Reply #80 on: March 25, 2017, 11:44:48 PM »
Sorry, MH but nothing that i could say will change your position , and i can only accept your opinion, but you will not listen to what you want listen.
About you say that we are both in the same position , that statement  are Miles away from the true because you are just a more theoretical person , and you knowledge is based not in practical work itself  but only in lecture . Are you a researcher ? Can you point to me or to others where i could find some of your experiments in last years ? I will appreciate that you could provide to us some of that work , sincerely.

Nelson Rocha

Nelson, I asked you specific questions about your claims about pancake coils and your bench work and you are avoiding answering them.  Why are you avoiding answering?

How do you know my knowledge is not based on any practical work?  Aren't you sensing that I have some technical knowledge?

Forget about the "show me your experiments or I won't talk with you" game.  We are having a conversation right now and you have not responded to the issues I raised and the questions I posed to you in my last posting to you.  Please respond to my last posting.

MileHigh

evostars

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Re: The bifilar pancake coil at its resonant frequency
« Reply #81 on: March 25, 2017, 11:55:21 PM »
Im not here posting for a discussion. I dont care for that. So I dont read all your posts. Im here to give my vision, my thuth. And I might be wrong. I know because I have been wrong a lot. Thats what i call learning. To think for myself. to question, and listen to my heart.

I made some pictures about the fields of the bifilar coil.
Shown in red and blue are 10 windings. You see only half of a bifilar pancake coil. The other half is mirrored on the right (use youre imagination).
I provide 100 volts, the red is one winding into the center, the blue is the second winding into the center, connected by the grey wire.

The voltage difference is 50 and 40. this 10V difference, is because i only use 10 windings in this example. If if would have 1000 windings, the difference would be 0,1 volt. (0,1%), so 49,9V and 50V.

A single wire, with current, radiates the dielectric field outwards, and the magnetic field circles around it. I also included a picture from Steinmetz, that shows the magnetic and dielectric field lines of two conducting wires. (figure yourself out if the current flows in the same direction or not).

The magnetic field flows over the windings of the pancake coil. above, and below are different directions, inward to the center hole, and outward to the outer rim. (the other side is mirrored).

If we would look from above, we would see a whirlpool/vortex of the magnetic field. One side is centrifugal, the other side is centripetal.
meaning, flowing towards the center from the outer rim, or flowing from the center outwards.

The direction of the vortex is determined by the current flow (right hand rule).

With AC, we have alternating current, meaning the direction of the vortex reverses. At the same time the voltage differnce between the windings remains the same. The dielectric field seeks the smallest place, which is the center of the coil. there it creates pressure. This pressure pushes out the field lines, creating the magnetic field. it can only go up or down. the direction is determined by the direction of the current flow, making the magnetic vortex.

therefor one side is strong in pushing, generating pressure (north) while the other is pulling, sucking in the field lines. (south)

Al fields are ether fields. the magnetic field is a ether field, the dielectric field is a ether field. It is the configuration of the field lines, that determines its actions.  when a ether whirlpool/vortex is created, we have a magnetic field(turning left or right is north or south). If the field has radial coherent lines, we have a dielectric field. (gravity is another topic, but guess what...)

With AC the dielectric field, is building up between the wires, in the smallest place. The magnetic field vortexes have to travel all the way around the coil. A much bigger distance than the space between the windings. This takes time. It takes time for the magnetic field to build up, and then when the current alters (AC) the magnetic field vortex flow, is reversed! This reversing field has inertia. At the same time the dielectric field between the spiral windings, has no difficulty in sitting there. It is not related to the alternating current. It is related to the voltage.

At a certain frequency, the magnetic field with its inertia, cant collapse anymore. It becomes static. The pulses it receives from the coil, are perfectly aligned with the building up and collapsing of the magnetic field. the field. The field gets a pulse, just when it was about to collapse. so it stays there. it becomes a stable vortex. A vortex of ether flow. sucking in, and pushing out.

the dielectric field rises in voltage. it starts radiating outwards, it becomes free of the magnetic vortex restricktions. the dielectric field expands outside of the windings, outside of the coil. this is why a neon tub lights up, its because of the dielectric field at its resonant frequency.

So far, my understaning, you dont have to agree, I dont say its true, its just my perspective. Alot of it is based on Eric p. Dollard, telsa, steinmets, Ken Wheeler, jj thompson etc...

nelsonrochaa

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Re: The bifilar pancake coil at its resonant frequency
« Reply #82 on: March 26, 2017, 12:19:16 AM »
Nelson, I asked you specific questions about your claims about pancake coils and your bench work and you are avoiding answering them.  Why are you avoiding answering?

How do you know my knowledge is not based on any practical work?  Aren't you sensing that I have some technical knowledge?

Forget about the "show me your experiments or I won't talk with you" game.  We are having a conversation right now and you have not responded to the issues I raised and the questions I posed to you in my last posting to you.  Please respond to my last posting.

MileHigh

MH ,
Did i told or write "show me your experiments or I won't talk with you" ?    I think not .  I already response to you but you try all time refute my answers  .
What i should do about that ? Only respect you opinion nothing more . I can not argue with someone that have their own solid opinion already formed, and i'm not try convince you of nothing or should i try make that like you  ?

 I only ask if you are a researcher , and if you are , point us  to you show some of you work just that . To me and is not need have a special "sense" to understand that you have knowledge and most of that is based in your crystallized intelligence  that you collect in your professional career like i already explain to you some posts behind. I could sense to that for sure you have already a advanced age , making you shielding yourself to protect your ego , maybe because in some part of your life you already work in something relevant or important in your professional career .

Is enough MH  , let topic run normally , our conversation already start upset the owner of topic evostars and he have right about that , because we already exposed some of our opinions even different opinions .

Nelson Rocha


nelsonrochaa

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Re: The bifilar pancake coil at its resonant frequency
« Reply #83 on: March 26, 2017, 12:21:09 AM »
Im not here posting for a discussion. I dont care for that. So I dont read all your posts. Im here to give my vision, my thuth. And I might be wrong. I know because I have been wrong a lot. Thats what i call learning. To think for myself. to question, and listen to my heart.

I made some pictures about the fields of the bifilar coil.
Shown in red and blue are 10 windings. You see only half of a bifilar pancake coil. The other half is mirrored on the right (use youre imagination).
I provide 100 volts, the red is one winding into the center, the blue is the second winding into the center, connected by the grey wire.

The voltage difference is 50 and 40. this 10V difference, is because i only use 10 windings in this example. If if would have 1000 windings, the difference would be 0,1 volt. (0,1%), so 49,9V and 50V.

A single wire, with current, radiates the dielectric field outwards, and the magnetic field circles around it. I also included a picture from Steinmetz, that shows the magnetic and dielectric field lines of two conducting wires. (figure yourself out if the current flows in the same direction or not).

The magnetic field flows over the windings of the pancake coil. above, and below are different directions, inward to the center hole, and outward to the outer rim. (the other side is mirrored).

If we would look from above, we would see a whirlpool/vortex of the magnetic field. One side is centrifugal, the other side is centripetal.
meaning, flowing towards the center from the outer rim, or flowing from the center outwards.

The direction of the vortex is determined by the current flow (right hand rule).

With AC, we have alternating current, meaning the direction of the vortex reverses. At the same time the voltage differnce between the windings remains the same. The dielectric field seeks the smallest place, which is the center of the coil. there it creates pressure. This pressure pushes out the field lines, creating the magnetic field. it can only go up or down. the direction is determined by the direction of the current flow, making the magnetic vortex.

therefor one side is strong in pushing, generating pressure (north) while the other is pulling, sucking in the field lines. (south)

Al fields are ether fields. the magnetic field is a ether field, the dielectric field is a ether field. It is the configuration of the field lines, that determines its actions.  when a ether whirlpool/vortex is created, we have a magnetic field(turning left or right is north or south). If the field has radial coherent lines, we have a dielectric field. (gravity is another topic, but guess what...)

With AC the dielectric field, is building up between the wires, in the smallest place. The magnetic field vortexes have to travel all the way around the coil. A much bigger distance than the space between the windings. This takes time. It takes time for the magnetic field to build up, and then when the current alters (AC) the magnetic field vortex flow, is reversed! This reversing field has inertia. At the same time the dielectric field between the spiral windings, has no difficulty in sitting there. It is not related to the alternating current. It is related to the voltage.

At a certain frequency, the magnetic field with its inertia, cant collapse anymore. It becomes static. The pulses it receives from the coil, are perfectly aligned with the building up and collapsing of the magnetic field. the field. The field gets a pulse, just when it was about to collapse. so it stays there. it becomes a stable vortex. A vortex of ether flow. sucking in, and pushing out.

the dielectric field rises in voltage. it starts radiating outwards, it becomes free of the magnetic vortex restricktions. the dielectric field expands outside of the windings, outside of the coil. this is why a neon tub lights up, its because of the dielectric field at its resonant frequency.

So far, my understaning, you dont have to agree, I dont say its true, its just my perspective. Alot of it is based on Eric p. Dollard, telsa, steinmets, Ken Wheeler, jj thompson etc...


Very nice explanation ***** stars :)

MileHigh

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Re: The bifilar pancake coil at its resonant frequency
« Reply #84 on: March 26, 2017, 12:47:43 AM »
Evostars:

Don't be passive-aggressive rude with this "I am not reading you" comment.

I attached a graphic that I got with a search.  Your shape of the magnetic field around a pancake coil is fundamentally correct.  However, it is not a vortex, there is no movement, there is no Bloch wall.  If you have DC going through a pancake coil, you can envision the magnetic field like a compressed static doughnut shape and of course in theory it extends out to infinity.  It simply represents the storage of the supplied electrical energy in the form of a magnetic field.

When it comes to magnetic fields there is actually no such thing as "North" and "South" because magnetic field lines form continuous loops.  "North" and "South" are nothing more than artificial nomenclature shortcuts that make it easier to discuss magnetic fields.  Yes, that means there is actually no such thing as a "North" magnetic field emanating from the north pole of a bar magnet.

One place where you are directing too much investigative energy, in my opinion, is with respect to the electric field lines between the turns of a pancake coil.  In terms of energy storage and what determines the electrical dynamics of a coil, the magnetic field and the energy stored in the magnetic field of a coil is the elephant, and the electric field and the energy stored in the electric field is the tiny insignificant ant.

What you should want to do it learn how a coil works in a circuit first and foremost, but ultimately that is your choice.  For example, if I said to you the instant you connect a coil to your battery source, what is the most interesting and relevant piece of information about that event?  I would not be surprised if you cannot answer that.

You need to look at art as an example.  Picasso and Warhol started off as regular commercial artists making ordinary paintings.  It's only after they mastered that part of the craft did they branch out and paint cubist figures with three eyes and replicate images of soup cans.  The point is understanding the basics gives you a foundation to learn more about the esoteric.

Quote
At a certain frequency, the magnetic field with its inertia, cant collapse anymore. It becomes static

Coils and their associated circuits have frequency transfer characteristics as you sweep the frequency up and down.  It is indeed a phenomenon related to inertia.  But there is no such thing as saying "the coil can't collapse anymore, it becomes static."  Understanding frequency characteristics and frequency transfer functions is one of the fundamental things about coils (and capacitors) that you should know if you want to understand what is happening on your bench.

MileHigh

MileHigh

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Re: The bifilar pancake coil at its resonant frequency
« Reply #85 on: March 26, 2017, 12:57:12 AM »
MH ,
Did i told or write "show me your experiments or I won't talk with you" ?    I think not .  I already response to you but you try all time refute my answers  .
What i should do about that ? Only respect you opinion nothing more . I can not argue with someone that have their own solid opinion already formed, and i'm not try convince you of nothing or should i try make that like you  ?

 I only ask if you are a researcher , and if you are , point us  to you show some of you work just that . To me and is not need have a special "sense" to understand that you have knowledge and most of that is based in your crystallized intelligence  that you collect in your professional career like i already explain to you some posts behind. I could sense to that for sure you have already a advanced age , making you shielding yourself to protect your ego , maybe because in some part of your life you already work in something relevant or important in your professional career .

Is enough MH  , let topic run normally , our conversation already start upset the owner of topic evostars and he have right about that , because we already exposed some of our opinions even different opinions .

Nelson Rocha

Sorry but I am going to translate that for you Nelson:  You stated that there is something special about a pancake coil and you have done research on your bench related to this.  I asked you for some details about what is so special about a pancake coil and what interesting research you have done on your bench and you have nothing to say.  I watched your clip where you lit a light bulb submerged in a glass of water which is not really an interesting experiment.

Suppose you have a 30 mH coil.  Can you name three ways to make it generate 172 volts?

I have the same message for you, the best way for you to appreciate what you are doing on your bench with your coil experiments and to do better experiments is to learn first about the fundamental basics about how coils work.  It's all up to you.

MileHigh

nelsonrochaa

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Re: The bifilar pancake coil at its resonant frequency
« Reply #86 on: March 26, 2017, 01:20:43 AM »
Sorry but I am going to translate that for you Nelson:  You stated that there is something special about a pancake coil and you have done research on your bench related to this.  I asked you for some details about what is so special about a pancake coil and what interesting research you have done on your bench and you have nothing to say.  I watched your clip where you lit a light bulb submerged in a glass of water which is not really an interesting experiment.

Suppose you have a 30 mH coil.  Can you name three ways to make it generate 172 volts?

I have the same message for you, the best way for you to appreciate what you are doing on your bench with your coil experiments and to do better experiments is to learn first about the fundamental basics about how coils work.  It's all up to you.

MileHigh


MH,
I just send you that clip in context of we are talking about use square wave to tune the coil and i add : "There you have a jagged scope feed by a square wave"  but that simple bad quality video could show you too how bad is the transfer of power in a bifilar pancake coil .
But you like distort and manipulate the words , but nothing that majority of people that normally came to this forum  already don't know , is MH in their old fashion behavior  .

That coil is special  for sure  : https://www.youtube.com/watch?v=XGyz31yaCdw
Now make you own interpretation if you could or if you want , and i know for sure that you will say exactly the same thing that you already state before :
 nothing interesting  .

Do not waste your time with me anymore, you're just wasting your time , is not easy understand you really .

Peace to you!  for sure your soul need that .


Nelson Rocha

nelsonrochaa

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Re: The bifilar pancake coil at its resonant frequency
« Reply #87 on: March 26, 2017, 01:26:47 AM »

MH,
I just send you that clip in context of we are talking about use square wave to tune the coil and i add : "There you have a jagged scope feed by a square wave"  but that simple bad quality video could show you too how bad is the transfer of power in a bifilar pancake coil .
But you like distort and manipulate the words , but nothing that majority of people that normally came to this forum  already don't know , is MH in their old fashion behavior  .

That coil is special  for sure  : https://www.youtube.com/watch?v=XGyz31yaCdw
Now make you own interpretation if you could or if you want , and i know for sure that you will say exactly the same thing that you already state before :
 nothing interesting  .

Do not waste your time with me anymore, you're just wasting your time , is not easy understand you really .

Peace to you!  for sure your soul need that .


Nelson Rocha


PS - MH is you a man or a  "grown" kid ?  I can sense to that you are from Canada because you have fun just go make dislike just by fun .
Grow your inside man !

evostars

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Re: The bifilar pancake coil at its resonant frequency
« Reply #88 on: March 26, 2017, 01:51:07 AM »

Very nice explanation ***** stars :)
Thanks!

MileHigh

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Re: The bifilar pancake coil at its resonant frequency
« Reply #89 on: March 26, 2017, 03:04:28 AM »

PS - MH is you a man or a  "grown" kid ?  I can sense to that you are from Canada because you have fun just go make dislike just by fun .
Grow your inside man !

You made some claims and when you were asked to back them up you had nothing to say.  I wasn't asking my questions for fun, I wanted to see what you had to say, which we now know is nothing.  Anybody can play with a coil and light some LEDs.  Who is acing like the child?