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Old February 3rd 04, 06:15 PM
Cecil Moore
 
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Wes Stewart wrote:
Mine aren't Laplace loads. There are straight RLC with C=0.


The 'LO' display says "Laplace Coefficients", "Select to show
values", and the values are all zero. The feedpoint impedance
of the antenna is infinite.

I believe that you have stated that in your Kraus
reference that he used the self-resonance of the inductors to do the
magic.


No magic - just relatively simple experiments. 1/2WL of a helical
antenna reverses the phase of the current just like a 1/2WL wire
does, over ground or in free space.

How on Earth can you expect a load consisting of only R and Xl to be
self-resonant?


I *don't* expect such a coil to simulate reality. That's the whole problem.
The artificial lumped load software doesn't match reality. It only
approaches reality for "physically small" coils. Once again, a 75m Texas
Bugcatcher coil is not physically small.
--
73, Cecil http://www.qsl.net/w5dxp



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