Hi Jerry,
I wouldn't think you'd see any directional qualities at all, but your
effective gain may be a bit lower, and your takeoff angle may be a bit
higher, in the direction of the shorter radials - if you were to equally
space all of your radials around the antenna. If you do as you've
mentioned, that is doubling or tripling the quantity of radials in the
shorter radial directions, you may not perceive much of a change.
Conventional wisdom is to lay down as much copper you can, where you can,
and increase the density in the shorter directions, especially as you get
closer to the feed or maximum current point. I believe having many 1/10th
wavelength long radials is just as good as (or better than) fewer
quarter-wave wires. It's nice to have both (many short and several long
radials), too!
These assumptions are based on a ground mounted antenna with radials on top
of, or slightly buried, in the soil.
Good luck.
Steve, NL7W
-----Original Message-----
From: towertalk-bounces@contesting.com
[mailto:towertalk-bounces@contesting.com] On Behalf Of Jerry Keller
Sent: Monday, November 29, 2004 1:50 PM
To: (Reflector) TowerTalk
Subject: [TowerTalk] Uneven Radials
Gentlemen:
For a 40M 1/4 wave vertical at one end of my back yard, I have room for
radials on the surface to
run out 60' to the west, 30' to the east, 25' to the north, and only10' to
the south. I'm in eastern
PA, and the earth here has pretty good conductivity.
(1) Should I expect any directional consequences? I would think so, but in
what directions?
(2) I had planned on 60 radials evenly spaced. Would it help to have extra
radials in the directions
with the shortest runs?
(3) How would the answers be different for 80M? 160M?
73, Jerry K3BZ
_______________________________________________
See: http://www.mscomputer.com for "Self Supporting Towers", "Wireless
Weather Stations", and lot's more. Call Toll Free, 1-800-333-9041 with any
questions and ask for Sherman, W2FLA.
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_______________________________________________
See: http://www.mscomputer.com for "Self Supporting Towers", "Wireless Weather
Stations", and lot's more. Call Toll Free, 1-800-333-9041 with any questions
and ask for Sherman, W2FLA.
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