Tesla's "COIL FOR ELECTRO MAGNETS," patent #512,340 is a very special coil design because, unlike an ordinary coil made by turning wire on a tube form, this one uses two wires laid next to each other on a form but with the end of the first one connected to the beginning of the second one. In this patent Tesla explains that the double coil will store many times the energy of a conventional coil. A bifilar coil is capable of holding more charge than a single wound coil. When operated at resonance, the distributed capacitance of the bifilar coil is able to overcome the counter - electromotive force (e.m.f.) normal to coils, inductive reactance. Because of the electrical activity, a bifilar coil does not work against itself and the potential across the coil quickly builds to a high value. The difference between the turns becomes great enough that the energy is practically all potential, at this point, the system becomes an electrostatic oscillator.
A standard coil of 1000 turns with a potential of 100 volts will have a difference of .1 volt between turns. A similar bifilar coil will have a potential of 50 volts between turns. Stored energy is a function of the square of the voltages the energy. That equates to 502/.12 = 2500/.01 = 250,000 times greater than the standard coil.
and there we have it......1 resonant frequency but 2 things in resoance.......this is of course not the single core setup but the transformer seperate from choke.......with a single core setup there would be multiple resonant frequencies, with each one favoring a certain coil.
ANY ONE KNOW WHERE TO GET A CHEAPCHEAPCHEAP SPECTRUM ANALYZER??
