>This link http://www.commtechrf.com/documents/nab1995.pdf leads to a paper
>by Clarence Beverage with some real-world results for monopoles with
>elevated wires used as a counterpoise.
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Towards the end of the above reference mention was made of a Mexican BC
station using a slanting parasitic reflector (probably wire) in conjunction
with its vertical tower radiator.
Have Topbanders used parasitic elements?
Although a radiator with an electrical length of 0.25 wavelength worked
against a non-resonant ground system is common and successful, I believe
(I hope correctly) that in order to be to be effective parasitic elements
need to be close to 0.50 wavelength (+ or - thereof, depending on whether
reflecting or directing),at least electrically if not possible physically.
A practical solution suggests a parasitic element in an inverted vee
configuration in order to handle the considerable length (reducible with
lump loading) required to approach ~0.50 wavelength.
Commentary welcome!
73,
Charles, W2SH
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UR RST IS ... ... ..9 QSB QSB - hw? BK
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