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[TowerTalk] Super high antennas on 10 to 20

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Subject: [TowerTalk] Super high antennas on 10 to 20
From: coneal@ma.ultranet.com (Chuck O'Neal)
Date: Fri, 1 Feb 2002 21:13:19 -0500
In getting back to the basics, I submit that at heights over 4 to 6
wavelengths above ground, the antenna is in "free space" and 
that's why the "nulls"are filled in. Also, at these heights, in free space 
means you have no gain from ground reflection, so they are 5-6 db
down from lower antennas.  How does one define free space?  How
high above ground would you have to be to be considered in this category?
73,
K1KW


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