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Topband: Forestry Effect on Antennas and Radials

To: Topband <>
Subject: Topband: Forestry Effect on Antennas and Radials
From: Charles Moizeau <>
Date: Sat, 3 Jul 2010 18:11:25 -0400
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At my QTH in NJ I have the capability to mount a 500-foot,
two-line, reversible Beverage running NE-SW. 
However, I am hesitant to undertake this project because the antenna
would be entirely in the woods.  These are not dense woods, for deer now 
consume every sapling.  Therefore, there are only trees of from 25
to 90 feet high.  


Because of the deer, the Beverage would have to be at least
six feet high.


Two questions: 
1)  Would the antenna, 500 feet
long, still be reasonably effective at that height?  2)  Would it be able to
receive an adequate signal in the described woods?  


For the record, I already notice that 16 in-ground radials,
each 160 feet long and running entirely in the woods, produced very little
change in the performance of my vertical transmitting antenna when they were
added to an existing field of 22 radials, 60-120 feet long, installed in an
open lawn area.


I have tentatively concluded that the woods to the north are
absorbing the radiation from my transmit antenna, and therefore the same kind
of woods, lying to the south and east but more than 100 feet away, will
seriously diminish the signal reaching the Beverage.


I’d greatly welcome reading comments on this list about your
experiences with the effects of wooded terrain on Beverages and also on
in-ground radials.




UR RST IS ... ... ..9 QSB QSB - hw? BK

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