August 23rd 05, 07:06 AM
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On Mon, 22 Aug 2005 22:57:05 -0500, (Richard
Harrison) wrote:
Reg also wanted to know the impedance of the antenna, I believe, but its
numerical value depends on construction, height of the elements, their
size, and coupling, if any, to their surroundings. 35 ohms might have
been a good guess.
Hi Richard,
A reasonable guess indeed, given that the monopole with two radials is
not too terribly different.
The idea of a polyphase antenna is interesting but I don`t see what
justifies its increased complexity, unless it happens to place nulls
Well, in phact the fases contribute to null philling - but not
completely so.
In that case, the elements would most likely be vertical to launch a decent
ground wave.
Interesting lobes change, with it turned into an upside down Y (like
the star for a Mercedes) the result is to pump the clouds to more
effect. When turned to present a right side up Y, the result is
distinctly more inclined towards the horizon, but still a better
horizontal polarization performer than vertical (which is attended by
many more variables related to ground and height, of course).
73's
Richard Clark, KB7QHC
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