TopBand: Wire FENCES and Ground Mounted Verticals ...

[Eric Gustafson]

>Date: Tue, 11 Feb 1997 14:24:15 -0800
>From: "Billy W. Cox" <aa4nu@ix.netcom.com>

>
>Does a 4' high cattle fence "attenuate" the RF from say 1 degrees up to
>a point equal to the top of the 4' high cattle fence ? 
>

The horizontal fence interacts very little with the vertical.


>Or for the frequency range of 1.8>4.0 does the vertical "see" the fence
>at all ? Would grounding the fence make any difference ?
>

It might make the fence charger quieter (or noisier).  It won't do much one
way or the other for the antenna situation.



>Like wise the more common "Sears chain link" is it worse than the style
>of cattle fence that has it's pattern of squares at 6-8" intervals ?
>



>I think the debate on ground verses elevated gets closer and closer as
>the number of radials is increased, that point is begining to be even
>agreed upon by both camps ...
>
>My spin on this is ... 16 ground mounted radials to a 0.25w vertical
>mounted say 10' away from a 4' "wire fence of some form" verses the
>same vertical mounted with the feedpoint 8' above the ground but
>using only 4 elevated radials, making it 4' ABOVE the fence ...
>
>Which is "more better" ?
>

Until the elevated radials are elevated enough (3/8 to 1/2 wavelength),
more radials is "more better" until you get up to 60 or so (assuming 1/4
wave radials). 


>What say ?  Looking for "real world" here ... TU !
>
>73 Billy AA4NU
>aa4nu@ix.netcom.com
>


73,  Eric  N7CL

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