Thread: Dual-Z0 Stubs
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Old May 7th 09, 01:51 PM posted to rec.radio.amateur.antenna
Cecil Moore[_2_] Cecil Moore[_2_] is offline
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First recorded activity by RadioBanter: Mar 2007
Posts: 3,521
Default Dual-Z0 Stubs

Tom Donaly wrote:
Meaning you don't want anyone to disagree with you.


What I invite is someone disagreeing with me about
a 75m Texas Bugcatcher coil along with some technical
proof that I am wrong. All I have gotten so far is
ad hominem attacks. Where's the beef?

Dr. Corum's empirically-based equations do not work
for toroidal inductors so they are outside the scope
of my discussion. Why not discuss the most common
large air-core coils used for loading 75m mobile
antennas?

No he wouldn't. You don't know what he would have measured.


I have exactly the same coil that Tom used for his
"measurements". I have measured the traveling wave
delay through the coil by loading it with a 5k
resistor to eliminate reflections. I do know what
he would measure if he would only run the experiment
correctly. You could do it too if you so chose. x and
y are the current sample points.

source---x-Tom's coil-y--5k load
+-------------------------+

Maxwell's equations don't say anything about "slow-wave
structures."


If you are saying that Maxwell's equations are invalid
for slow-wave structures, your argument is with Ramo,
Whinnery, and Dr. Corum, not with me.

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?


You are free to access the above web page to see who
wrote it. If Dr. Corum stole Reg's ideas, he should
have given him the credit. Dr. Corum does provide
50 references for his paper but Reg is not one of them.
However, here is a partial list:
7. J. D. Kraus, "Antennas"
19. F. E. Terman, "Resonant Lines in Radio Circuits"
23. J. D. Ryder, "Networks, Lines, and Fields"
29. S. Ramo and J. R. Whinnery, "Fields and Waves in Modern Radio"
30. R. W. P. King, "Electromagnetic Engineering"
43. M. Born and E. Wolf, "Principles of Optics"
--
73, Cecil, IEEE, OOTC, http://www.w5dxp.com