Cecil Moore wrote:
wrote:

I'll have to think about that a while and how it might affect what I am
saying.
(snip)
So here's the EZNEC example and an experiment that any
properly equipped person can duplicate. That includes
you and W7EL.

I took W7EL's EZNEC file and changed wire #203 from 0.25'
to 31.25'. At the 'tip' of the antenna, I installed a
439.2 ohm load that turns the antenna into a 90 degree
long *traveling-wave* antenna. Note that the current
magnitude at the top of the coil is identical to the
current magnitude through the load resistor. The load
resistor's value is very close to the calculated Z0
of the 31' #16 wire two feet above ground, using the
formula for a single wire transmission line above
ground.

The graphic is at http://www.qsl.net/w5dxp/test316y.GIF

The EZNEC file can be downloaded from:

http://www qsl.net/w5dxp/test316y.EZ
(snip)

Excellent!

Can you use this example, with varying frequency to explore your
assertion that the time delay (frequency times phase shift) of the
coil varies little over a significant range of frequencies up to self
resonance, and that that delay is about 1/4 cycle of the self resonant
frequency?

A graph of delay versus frequency would be useful. It should show
over what frequency range the coil acts mostly like a transmission
line and where it acts mostly like something else (i.e. inductor,
parallel resonant tank).