Depending on how long the fence is IMHO this act like a long unbalanced
transmission line with on side grounded thus destroying the wavefront
tilt ability of the single wire Beverage. OTOH if you put the Beverage
90 degrees and used the fence as part of your termination a either end
you might have a workable system.
Herb, KV4FZ
On 2/3/2015 11:28 AM, john@kk9a.com wrote:
What happens if the Beverage happens to be parallel to a steel fence?
Perhaps 10-20' away.
John KK9A
To: towertalk@contesting.com
Subject: Re: [TowerTalk] Beverage Antenna
From: "Joe Subich, W4TV" <lists@subich.com>
Date: Tue, 03 Feb 2015 08:55:15 -0500
Anecdotal reports over the years (~ 30?) of Beverage antennas over
an existing conductive wire/fence indicates that performance lags
that over moderate earth. The degradation comes from two apparent
modes: 1) the (typically larger) fence picks up noise and couples it
to the Beverage and 2) the the conductive nature of the fence upsets
the velocity factor (wave tilt) resulting in a shorter effective
length with lower signal strengths and broader patterns.
73,
... Joe, W4TV
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