The bifilar pancake coil at its resonant frequency

[Magluvin]

@Tinman,

"A flux density of 1 Wb/m2 is 1 tesla".

I would think that flux density and field strength go hand in hand.

Mags

[MileHigh]

But is funny. I know you consider yourself to be well above me in all this stuff, yet I can recognize an approximate coil resistance just by looking at it in a vid without proper perspective. If you are going to stand as an authority on these things here then I would expect the same kind of prowess as I had shown here. Sure you can lay it down and say it was a mistake, but at the time you were laying it down as if it were textbook example of what is going on in conrads coils. You resistance number was so far off that it made a uh and pf coil to look like the outcome was more than 200% worse than it actually is. Thats a big mistake, not a little tiny baby mistake. So its just hard to not think that maybe you are making these changes on purpose for your own benefit at degrading the experiments here. Sorry but as you know, this is not the first time for such mistakes of this sort.

mags

If you have a scientific mind you should realize that if the coil is one ohm or ten ohms it doesn't really matter.  The point is the energy storage in the resonant cavity is minuscule in comparison the power that is burned off to sustain that resonant cavity.

So its just hard to not think that maybe you are making these changes on purpose for your own benefit at degrading the experiments here.

The above is nonsense talk and take your ridiculous MIB fantasies elsewhere, don't lay them on me.

I am still asking you to tell me what use a series bifilar coil has in the real world.

Your speculation about a series biflilar coil "giving you an instant magnetic field" is you just fantasizing again.  The very nature of the impedance of a coil and it's refusal to allow for the instant creation of a magnetic field is because it takes real electrical work to create that magnetic field.  There is an energy density in the volume of the 3D space where the magnetic field exists, and that energy comes from the current flow slowly ramping up and overcoming the electrical inertia of the coil and filling the 3D space with magnetic energy.

You can fill up a capacitor quickly and store energy in 3D space in the form of an electric field, but you can't energize an inductor quickly and store energy in 3D space in the form of a magnetic field.  It's just the nature of the beast, it's the deck of cards that Nature has given us.  So your fantasies about a "near-instant magnetic field" from a bifilar coil are not going to happen.

[tinman]

If you have a scientific mind you should realize that if the coil is one ohm or ten ohms it doesn't really matter.  The point is the energy storage in the resonant cavity is minuscule in comparison the power that is burned off to sustain that resonant cavity.

The above is nonsense talk and take your ridiculous MIB fantasies elsewhere, don't lay them on me.

I am still asking you to tell me what use a series bifilar coil has in the real world.

Your speculation about a series biflilar coil "giving you an instant magnetic field" is you just fantasizing again.  The very nature of the impedance of a coil and it's refusal to allow for the instant creation of a magnetic field is because it takes real electrical work to create that magnetic field.  There is an energy density in the volume of the 3D space where the magnetic field exists, and that energy comes from the current flow slowly ramping up and overcoming the electrical inertia of the coil and filling the 3D space with magnetic energy.

You can fill up a capacitor quickly and store energy in 3D space in the form of an electric field, but you can't energize an inductor quickly and store energy in 3D space in the form of a magnetic field.  It's just the nature of the beast, it's the deck of cards that Nature has given us.  So your fantasies about a "near-instant magnetic field" from a bifilar coil are not going to happen.

So,are you saying that it will make no difference having 1 volt difference between turns,and 50 volts difference between turns?.

Well,looks like i really do have to wind me two coils now.
It's 9pm here--i got this 
Have no idea what happened to my old one's.


Brad

[maxc]

  You need to measure the input power.

Get a good capacitor charging it up for the input power. Run your transistor off separate power source  power source. The rest is basic math.

[MileHigh]

Well, since were are discussing the idea of the creation of a near-instant magnetic field by an inductor, then how can that be accomplished?  In theory there is a way to do it, so how do you go about it?

I am not going to answer the question and I would ask those that know to not answer the question.  The point is to get the wheels in your heads turning and thinking and analyzing and creating.  Many of you have been playing with coils for upwards of 10 years now, so what is the recipe for a near-instant magnetic field from a coil?