Richard Clark wrote:
Remove that differential, and the error corrected delay collapses
towards Tom's results!

This from the person who asserted that the reflections
from a non-reflective thin-film coating are brighter
than the surface of the sun. Richard will twist facts
until there is zero resemblance to reality.

Richard, I have no idea what your ulterior motive is
but is it certainly not leaning toward technical facts.

If you don't like my measurements, then please explain
the phase shift through the EZNEC coil model at:

http://www.w5dxp.com/coil512.ez

Almost anyone is capable of creating a forward traveling-
wave through a real-world coil on the bench, as I did, and
measuring the phase shift. Have you done that? Obviously
not, since to do so would force you to side with technical
facts, and not with the old wives' tale you are promoting.

Use a TDR to measure the delay through a 75m bugcatcher
coil and get back to us with the results.
--
73, Cecil http://www.w5dxp.com