Cecil Moore wrote:
John KD5YI wrote:
I think any inductor with the same inductance, Q, and self-resonant
frequency will give the same velocity factor and delay as your
Bugcatcher.

That may or may not be true - I don't have an
opinion one way or another - and it is NOT part
of my argument. My argument deals only with
75m Texas Bugcatcher coils and other large air-
core loading coils used on 75m.

My argument is that the velocity factor of a 75m
Texas Bugcatcher coil is ~0.02, occupies ~41
electrical degrees on 4 MHz, and exhibits a
delay of ~28 nS through the coil. That is my only
argument. I am not interested in diversions from
that argument.

Meaning you don't want anyone to disagree with you.



My argument also includes the 100 turn, 10 inch long,
2 inch diameter coil that w8ji used for his 3 nS delay
"measurements". If he had used traveling wave current
for the measurement, he would have measured approximately
25 nS.

No he wouldn't. You don't know what he would have measured.
You don't know how to measure it yourself because you don't have
any idea of what's going on, theoretically.



Maxwell's equations for slow-wave structures (like
a 75m Texas Bugcatcher loading coil) are given in
"Fields and Waves ...", by Ramo and Whinnery:
pages 467-479 in the 2nd edition. This is one of
the references in the Corum IEEE paper.

Maxwell's equations don't say anything about "slow-wave
structures." If they did, you couldn't understand the vector
calculus involved, anyway. This is more picking and choosing
from authorities.



What do you make of Roy's (w7el) statement at:

http://www.w8ji.com/agreeing_measurements.htm

"As described in my posting on rraa of November 11,
the inductor 'replaces' about 33 electrical degrees
of the antenna."

Are you sure that isn't a quote from Reg Edwards, whose ideas
you stole in the first place? Reg thought that antennas were
transmission lines. There's nothing wrong with that. Reg even
worked out some practical formulas based on his ideas that seemed
to work well enough for who they were for. What he didn't do was
discover any laws of nature, any more than you have.

73,
Tom Donaly, KA6RUH