Keith Nagel writes, > Yep, that's it exactly. The resonator has two modes, an inductive > slow wave mode and a capacitive fast wave mode. The capacitive > coupling permits energy to travel directly along the axis of > the coil, which means the coil is a true resonator rather than a simple > inductor.
The implication being that the coil might have two overlapping resonant modes, which could be partially self-canceling unless one was careful to make the ratio between the fast mode and slow mode into an integer multiple.... Which task is not exactly a simple matter... as Stephen Lawrence points out, especially since the magnet wire in these coils is small dia and may have a varnish of imprecise thickness, so that the refractive index may not even be consistent enough to be published. Maybe that's why so many people have failed to get Scott McKie's tank circuit device to work as claimed....? Jones
