David
I reviewed your page to find out how the capacitor was made
and how it was driven. Unfortunately I could not figure it out!
One thing I thought about as I read the page was the soldered
joints and its added resistance. It would be interesting if some time
you could use some aluminum foil preferably with adhesive backing
to go from one end of the loop to the other in a continuous strip to
gauge
what difference the jointing made on the resonant frequency.
Adhesive tape can be found at any hardware store in the heating and
cooling
ducting section.
Regards
Art