Jim Brown correctly points out that a modest vertical with a loading coil or
possibly a capacitance hat would be preferable for DX. However, looking at
the two possibilities you are considering, if you want to have a shot at DX
you need to use your second option with a short vertical wire.
I did a quick model of a 30-ft vertical wire with a 130-ft horizontal wire
and it does appear that the configuration would be somewhat better than a
dipole for DX. You would need a loading coil to achieve resonance.
If this is all you can do then you need to do it. In my opinion, the worst
thing you could do would be to get talked out of doing anything. Put up
what you can and learn some "stuff" by adjusting the coil, adding ground
radials, and getting on 160 and making some QSOs.
Once you do this you will have some fun and more ideas will percolate.
------------------ Wes Attaway (N5WA) ------------------
1138 Waters Edge Circle - Shreveport, LA 71106
318-797-4972 (office) - 318-393-3289 (cell)
Computer Consulting and Forensics
-------------- EnCase Certified Examiner ---------------
-----Original Message-----
From: towertalk-bounces@contesting.com
[mailto:towertalk-bounces@contesting.com] On Behalf Of Blair S Balden
Sent: Friday, December 04, 2009 7:11 AM
To: towertalk@contesting.com
Subject: [TowerTalk] dipole configuration
Hello towertalk group,
I'm getting set to put up a wire dipole for 160 meters. I'm considering 2
options, and I wanted to hear which one you guys think might be better. The
feed point will be about 38 feet up on the side of a tower near the house.
>From there, I have just enough room to stretch out a full quarter wave to
the back edge of my property, where I can get about 25 - 30 feet of height
in a tree at the other end. So this leg of the dipole will be pretty much
horizontal.
For the other leg, I don't have that much room. I will need to put in a
loading coil. I have about 60 feet to a tree in the front yard, where I can
get about 25 feet of height. This is what I was planning, but I also
thought about bringing that leg straight down from the feed point. In that
case, the antenna would have one full-length horizontal leg and one short
(about 30 foot) vertical leg with a loading coil.
Do you think anything would be gained by having part of the antenna
vertical? Would I get some lower-angle radiation if I did it that way? Or
would it work better more or less horizontal?
Thanks in advance for any input.
73,
Blair NP2F
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