This theme seems to be that a Beverage needs to be low to reduce noise,s
been stated several times by several different people over time on this
reflector. Surely a moer scientific study has been done on a Beverage - from
laying on the ground to some height - and the results charted showing the
change in noise. Just what is the height where the noise factor would
negate using such an antenna at all. We have all kinds of studies on yagis,
dipoles, and other antennas on test ranges under differing heights, surely
there is one on Beverage's and noise.
Length, I think someone also mentioned that exceeding a wavelength doesn't
achieve anything additional that is discernible. Did I read this right?
I too would like to learn more about Beverage's and don't have ON4UN's book
in my library.
Don W7WLL
-----Original Message-----
From: Chuck Dietz
Sent: Saturday, January 31, 2015 3:56 PM
To: john@kk9a.com
Cc: towertalk@contesting.com
Subject: Re: [TowerTalk] Beverage Antenna
The noise is mostly locally produced, therefore the lower the antenna, the
less noise pickup. The distant signal is coming from a slightly higher
angle and, while it will be a smaller amplitude for a lower antenna (less
efficient), it will be proportionally higher than the noise. In other
words, lowering the antenna will lower the noise more than the desired
signal. The theory behind the operation of the Beverage antenna includes
wave bending which is over my pay grade. (and not entirely believable to
me.)
Chuck W5PR
On Saturday, January 31, 2015, <john@kk9a.com> wrote:
PVC pipe is a good method. I pound fiberglass posts into the ground and
attach the wire using plastic electric fence clamps from a farm store.
John KK9A
To: towertalk@contesting.com <javascript:;>
Subject: Re: [TowerTalk] Beverage Antenna
From: Patrick Greenlee <patrick_g@windstream.net <javascript:;>>
Date: Sat, 31 Jan 2015 05:16:31 -0600
This PVC pipe over T posts sounds like a workable solution. It will
elevate
the wire sufficiently that I can drive a tractor under it. An alternative
is
to elevate the Beverage wire 6-8 ft above a wire fence, would the fence
degrade the Beverage performance significantly? It would be very
convenient
to be able to have the Beverage wire run along the fence.
Patrick NJ5G
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