The bifilar pancake coil at its resonant frequency

[ramset]

Good night Ya'll

[Magluvin]

very confusing indeed sort of like the pole above with 5 members voting and ten votes cast

I allowed 2 choices per voter so they can express beyond just one choice, so it looks like some are choosing that ability.  I dont think it means you can vote 2 times for the same choice of answer.

Mags

[TinselKoala]

Well I don't know about the rest of you all, but I'm going to make a self-running
electrical generator come hell or high water.     

Good for you. It's too bad though, that the wire you have selected is plastic-insulated so that the conductors will be so far apart that any distributed capacitance will be small, and the coil itself will be relatively large for the length of wire it has in it, which also reduces its self-inductance.

To maximize distributed capacitance and self inductance the conductors need to be as close together as possible, hence the use of enamelled magnet wire is preferred if maximizing those parameters is important. As I believe it is, to lower the frequencies of interest and to make any "special" effects strong enough to rise above the noise floor.

YMMV of course, so good luck and don't forget to report your positive _and negative_ results, if any.

[Magluvin]

Good for you. It's too bad though, that the wire you have selected is plastic-insulated so that the conductors will be so far apart that any distributed capacitance will be small, and the coil itself will be relatively large for the length of wire it has in it, which also reduces its self-inductance.

To maximize distributed capacitance and self inductance the conductors need to be as close together as possible, hence the use of enamelled magnet wire is preferred if maximizing those parameters is important. As I believe it is, to lower the frequencies of interest and to make any "special" effects strong enough to rise above the noise floor.

YMMV of course, so good luck and don't forget to report your positive _and negative_ results, if any.

If he takes 2 rolls, 1 for each winding, then he can parallel the individual wires at the ends and if wound nice and tight, the wire bumps can interlock bringing more conductors in proximity to each other. It will increase capacitance. Would that increase the inductance with more than 1 conductor in parallel like that?

Mags

[tinman]

Ok,for those that want to know the difference between the BPC circuit i am experimenting with,and Partsman's circuit--see below.

If you take the point 1 of R2,and swing it around,and place it at point 2,you have Partsman's DUT circuit--simple.


Brad