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Old August 30th 07, 12:16 PM posted to rec.radio.shortwave
RHF RHF is offline
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First recorded activity by RadioBanter: Jun 2006
Posts: 8,652
Default 3-Sided "Bent" Random Wire Antenna Over a Backyard Fence

JS - Yes it will work. ~ RHF
.
3-Sided "Bent" Random Wire Antenna Over a Backyard Fence
http://groups.yahoo.com/group/Shortw.../message/14591
.
First most so-called 'Longwire' Antennas used by Shortwave
Listeners (SWLs) are in-fact "Random Wire" Antennas.
.
Your simplest thing is to just have the Wire Antenna Element
from One to Three Feet above the Chain-Link Fence.
.
The Wire Antenna Element will only run around 3-Sides
of the Fence and not form a Loop.
.
It will be what is called a "Bent" Random Wire Antenna.
.
At the starting Point of the Wire Antenna Element place
an 8-Foot Ground Rod in the Ground.
.
Mount a 9:1 Matching Transformer on or very near the
Ground Rod and Ground {connect} the 9:1 Matching
Transformer as directed.
.
Run the Wire Antenna Element straight-up from the 9:1
Matching Transformer to the First Antenna Support Point;
and then along to the Rest of the Antenna Support Points
along the Fence.
.
Tip - Use 8-10 Feet long pieces of PVC Pipe as the Antenna
Supports held in place with Black Plastic Ties is an Easy-Up.
- - - Before you put-up the PVC Pipe paint it Green
and use Green Antenna Wire.
(o: Tell the Neighbors it for Growing Grapes )
.
-IF- You want to use or need to use Higher Corner Support
Points for the Wire Antenna Element; that will work too.
.
Between the Radio and the 9:1 Matching Transformer
use a Coax Cable as the feed-in-line.
.
You now have your 3-Sided "Bent" Random Wire Antenna
mounted over a Fence going around 3-Sides of the Yard;
and it is a Horizontal Antenna too.
.
The "Bent" Random Wire Antenna for the most part
is an Omni-Directional Antenna that receives well
from all directions.
.
.
hope this helps -iane ~ RHF {pomkia}
.
Follow-Up Post : The Corner Multi-Element Dipole Antenna
Over a Backyard Fence.
.
.
- - - In ,
- - - "Jeffery L. Smith" jsmith342@... wrote:
http://groups.yahoo.com/group/Shortw.../message/14564
.
Remember that I'm a newbie! I have read that the direction
of a longwire antenna determines how effectively it will
receive radio waves from a certain direction,
i.e., a NS antenna is better at receiving signals from the EW.
.
I have also read that, if one cannot set up an outdoor antenna,
it makes sense to run a long wire in a room by configuring it
in a square, along the 4 walls.
.
That said, has anyone tried using a squared longwire antenna
along the perimeter of their yard?
.
I have a roughly 40' x 50' back yard with chain link fence
around three sides.
.
Would there be an advantage to string the longwire (suspended
with nylon rope some distance in) around three of the corners,
sort of like the top rope of a boxing ring?
.
That would give me about 120' of longwire oriented in two directions.
.
Jeffery Smith
.
.
Shortwave Listener (SWL) Antennas Group = http://tinyurl.com/ogvcf
GoTo = http://groups.yahoo.com/group/Shortwave-SWL-Antenna/
The SWL Antenna Discussion Group = http://tinyurl.com/ogvcf
Shortwave Listener (SWL) Antenna HELP = http://tinyurl.com/ogvcf
Shortwave Listener (SWL) Antenna NEWS = http://tinyurl.com/ogvcf
Shortwave Listener (SWL) Antenna INFO = http://tinyurl.com/ogvcf
* * * All Are Welcome : Including ELMERS and 'Want-to-be-Elmers'
plus plain old "Mister-Know-It-Alls"; and even those Newbees with
"I Know This Is A Really Dumb Question - But _ _ _ _ _ _ _ _ "
.
The Shortwave Listener's Blessing :
SWL BLESSING = http://tinyurl.com/s2bjm
May You Never Tire of Listening to the Radio and Always
have Strong Signals and Noise Free Reception ~ RHF {ibid}
http://groups.yahoo.com/group/Shortw...a/message/9233
.
Tous Sont Bienvenus ! - - - Groupe par Radio
d'auditeur d'onde courte pour des Antennes de SWL
http://groups.yahoo.com/group/Shortwave-SWL-Antenna/
.
Alle Sind Willkommen ! - - - Shortwave Radiozuhörer
Gruppe für SWL Antennen
http://groups.yahoo.com/group/Shortwave-SWL-Antenna/
.
Tutti Sono Benvenuti ! - - - Gruppo Radiofonico
dell'ascoltatore di onda corta per le Antenne di SWL
http://groups.yahoo.com/group/Shortwave-SWL-Antenna/
.
Todos São Bem-vindos ! - - - Grupo de Rádio
do ouvinte do Shortwave para Antenas de SWL
http://groups.yahoo.com/group/Shortwave-SWL-Antenna/
.
¡Todos Son Agradables! - - - Grupo de Radio del oyente
de la onda corta para las Antenas de SWL
http://groups.yahoo.com/group/Shortwave-SWL-Antenna/
.
= = = = Plain Old American-English Translation = = = =
All are Welcome - - - To Join the Shortwave Listeners
(SWL) Antenna Group on YAHOO !
http://groups.yahoo.com/group/Shortwave-SWL-Antenna/
.
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Old August 30th 07, 03:21 PM posted to rec.radio.shortwave
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First recorded activity by RadioBanter: Jul 2006
Posts: 2,027
Default 3-Sided "Bent" Random Wire Antenna Over a Backyard Fence

This sounds quite workable. As an alternative, and which might help
avoid some RFI from the house, in place of the following:

On Aug 30, 4:16 am, RHF wrote:

snips
Run the Wire Antenna Element straight-up from the 9:1
Matching Transformer to the First Antenna Support Point;
and then along to the Rest of the Antenna Support Points
along the Fence.


....and then...

Between the Radio and the 9:1 Matching Transformer
use a Coax Cable as the feed-in-line.


.....Take the coax feedline itself and run it all the way up to the top
of the first support, and connect your 9:1 transformer there, so that
none of the exposed antenna element itself is vertical. You could use
a non-grounding variety of transformer for this purpose, or you could
have a longer ground wire up to your transformer. The best bet *for
this circumstance* might be to use a non-grounding transformer, but
have an extra grounding block for the coax at the point where it comes
closest to the ground. This is a modicum more involved, and slightly
more expensive (not excessively so), but again may be useful for
minimizing RFI.

I emphasize that this step would be an additional experiment, and
RHF's idea should work out just fine as is.

Bruce Jensen

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