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Return-path: <K1PX@aol.com>
From: K1PX@aol.com
Full-name: K1PX
Message-ID: <a0.18a71b28.28a80ede@aol.com>
To: <topband@contesting.com>
Date: Sun, 12 Aug 2001 12:54:54 EDT
Subject: Trees and absorption
To: topband@contesting.com
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Topbanders:
This is not scientific data, as others have mentioned, but I
have a noticeable problem with this issue at my particular
location.
My property is several acres in a watershed zone with densely
populated trees, significant foliage from spring to fall and a very
high water table.
During that time, with vertically polarized antennas compared
to horizontally polarized reference antennas, vertical polarization
appears to be down at least 10 dB from average signal levels
as compared to when the foliage is gone from November to May.
That is obviously not taking into account the seasonal effects
of the trees themselves or the amount of water in them at any
particular time.
There is often water in the trees that oozes out when I screw
eye bolts into them. I suspect there is year round absorption
but the difference with the foliage is quite noticeable.
While I do have many trees close to 100' in height, I have often
wondered how much better I would get out if they weren't there.
But, the trees are great for elevated radials and beverage runs.
73, Jim, K1PX
K1PX@aol.com
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<HTML><FONT FACE=arial,helvetica><FONT SIZE=2>
<BR> Topbanders:
<BR>
<BR> This is not scientific data, as others
have mentioned, but I
<BR> have a noticeable problem with this
issue at my particular
<BR> location.
<BR>
<BR> My property is several acres in a
watershed zone with densely
<BR> populated trees, significant foliage
from spring to fall and a very
<BR> high water table.
<BR>
<BR> During that time, with vertically
polarized antennas compared
<BR> to horizontally polarized reference
antennas, vertical polarization
<BR> appears to be down at least 10 dB from
average signal levels
<BR> as compared to when the foliage is
gone from November to May.
<BR> That is obviously not taking into
account the seasonal effects
<BR> of the trees themselves or the amount
of water in them at any
<BR> particular time.
<BR>
<BR> There is often water in the trees that
oozes out when I screw
<BR> eye bolts into them. I suspect there
is year round absorption
<BR> but the difference with the foliage is
quite noticeable.
<BR>
<BR> While I do have many trees close to
100' in height, I have often
<BR> wondered how much better I would get
out if they weren't there.
<BR>
<BR> But, the trees are great for elevated
radials and beverage runs.
<BR>
<BR> 73, Jim, K1PX
<BR>
<BR> K1PX@aol.com</FONT></HTML>
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