Original poster: "David Thomson" <dwt-at-volantis-dot-org> Original poster: Paul Nicholson <paul-at-abelian.demon.co.uk> Gerry wrote: > > There is only one fundamental resonance. > Yes, the currents and the fields are locked together in a manner described by the Maxwell/Lorentz equations. So then you're basically saying the quarterwave theory does not apply to a Tesla coil? Dave