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Old February 18th 04, 05:28 AM
Mark Keith
 
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Cecil Moore wrote in message ...
bb wrote:
First... what is phasing of verticals.


Essentially the same as phasing of horizontal elements. If you turn
a 40m horizontal Yagi on it's side and bury half of it under a good
ground plane, you have a vertical beam.

My 40 m dipole is only 30' up...would vertical phasing be an
improvement?


A single vertical would be an improvement over a dipole at 30 ft if
working dx.
Two phased would be even better. If you aren't working dx, but more
close in stations within a few hundred miles, you would be better off
phasing parallel dipoles for gain. A bit of gain nearly equal to a 2
el yagi, and about an average 20 db f/b.

Maybe, maybe not. At my QTH, the vertical noise is 2 s-units higher
than the horizontal noise rendering any vertical antenna virtually
unusable. No vertical that I have ever tried could overcome that
-10 dB disadvantage. But your QTH could be entirely different from
mine. It is possible, but not likely, that your vertical noise is
lower than your horizontal noise.


If you are using the vertical for long haul, the increased received
noise is a non issue. The signals will override the noise. IE: the
noise might be 2 s units higher, but the signal increase over the low
dipole will likely be more than that. The vertical still wins overall.
Noise was never an issue when I used mine. The increased signals
always overrode it by a good amount. You didn't see this because you
didn't use yours for long haul. Many times my GP was nearly as quiet
as the dipole. If there is no vertically polarized local noise, there
is little difference between the two. At the moment I have three
antennas on 160. An inv L, a top load vertical, and a Z dipole. All
receive about equal noise as far as S meter reading. The dipole is
just as noisy as the other two on that band. Only my indoor 16 inch
small loop is really quiet...:/ MK
 
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