On Sat, 1 Apr 2006 00:59:10 +0100, "Reg Edwards"
wrote:

To nobody in particular.

To nobody in reply.

If the propagation time along a coil

which has been described as a transmission line

is equal to the time taken for
the current to travel along the length of wire in the coil at the
velocity of light, then, at a given frequency,

um, yes.

if a half-wavelength of wire is wound into a coil

which has been described as a transmission line

it should become self-resonant at that frequency.
But it isn't.

Maybe it is - within ±59% (after fudging the Vf)

Cecil's theories allows for so many possibilities ;-)