Gene Fuller wrote:
In that paper
he indicated various conditions for validity, such as the fact that the
coil must be near a quarter wave resonance for some of the mathematical
approximations to be valid.

What he *didn't* say is that if that same coil is cut
in half and used at the same frequency, the Z0 and VF
change.
--
73, Cecil http://www.w5dxp.com