Ok I see you made a correction in the inductance. Here is the sim shot with the update. The res freq is in the lower right.

Mags

Don't know if this helps or not, but fwiw:
https://www.youtube.com/watch?v=zRMNKMkj-0E&index=3&list=PL88933A424BCBF5EC
Bob

Your inductance seems very low so that 588mhz range may be correct.

Mags

I might have expected tks coil to be higher in inductance than mine with twice the no of turns where on the other end, your inductance is far below what either of us have and yours has about half the turns of mine. Its funny how inductance can be odd with diff wire sizes vs no of turns etc. Much harder to gauge by the looks of the coil compared to guessing the resistance value. Weird stuff.

Mags

Ok,so finding the resonant frequency the old way,seems like quite a task.
So what i did,was to put a diode on the positive input,so as the coil is only being pulsed by the top half(forward direction) of the sine.-->Blue trace =current--yellow =voltage across coil.

I managed to get the coil to ring,and so im guessing this ringing frequency is the resonant frequency of the bifilar coil--Yes?.

Will now try the single wound coil.


Brad