[Antennas] Radial Wires VS a wire or screen mesh

[K1TTT]

Mine are 10' up.

 

 

David Robbins K1TTT
e-mail: mailto:k1ttt at arrl.net
web: http://www.k1ttt.net
AR-Cluster node: 145.69MHz or telnet://dxc.k1ttt.net
  

-----Original Message-----
From: Idle-Tyme [mailto:nss at mwt.net] 
Sent: Sunday, November 15, 2009 15:16
To: K1TTT
Cc: antennas at mailman.qth.net
Subject: Re: [Antennas] Radial Wires VS a wire or screen mesh

 

How high are the raised Radials?

Joe WB9SBD

 
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K1TTT wrote: 

I use 2"x4" mesh fence wire under my raised radials on my 80m 4-square.
When I first did the installation I did measurements as I added radials to
the first vertical and then as I rolled out 150'x4' in a cross pattern under
the vertical.  There was much more change going from 4 to 8 raised radials
than there was in adding the screen, but it did seem to help a bit.  The
wire in that fencing is much heavier than chicken wire and I have gotten 5
or 6 years out of it so far.  I roll it up in the spring so I can cut
grass/weed under it and roll it out again before the fall contests and snow
start flying.
 
 
David Robbins K1TTT
e-mail: mailto:k1ttt at arrl.net
web: http://www.k1ttt.net
AR-Cluster node: 145.69MHz or telnet://dxc.k1ttt.net
 
 
  

-----Original Message-----
From: K2RS [mailto:K2RSonline at comcast.net]
Sent: Sunday, November 15, 2009 02:21
Cc: antennas at mailman.qth.net
Subject: Re: [Antennas] Radial Wires VS a wire or screen mesh
 
The contest station with the chicken-wire ground system for its 160
antennas is always near the top of the multi-multi category in major DX
contests and manages to rack up lots of Qs on 160 meters. So, while the
chicken wire might not be optimal, it works in the real world and, in
the end, that's all that really counts.
 
Jack   K2RS
 
Terry Conboy wrote:
    

This is probably fine as far as it goes.  The problem is that with only
4 rolls of chicken wire, there is still a lot of soil between the
conductive mesh.  The idea of using a large number of wire radials is to
provide a path for the RF displacement current back to the base of the
antenna that only involves a very short distance for current flowing in
the poorly conductive soil until it reaches a good conductor.
 
      

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