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TopBand: Receiving Loop

To: <topband@contesting.com>
Subject: TopBand: Receiving Loop
From: km1h@juno.com (km1h @ juno.com)
Date: Mon, 03 Nov 1997 10:05:22 EST
On Sun, 2 Nov 1997 22:53:52 -0600 "Mike Michon" <michon@eatel.net>
writes:
>Dear Antenna Experimenters,
>
>My inverted L is working, the amp is working, and the noise is 
>horrible.
>
>I got cranked up Saturday after having a terrifiically hard time 
>copying a
>California station Friday night.  Was going to install a K9AY?? 
>antenna
>from a recent QST article, but it looked like it was only directional 
>and
>wouldn't help noise, only qrm.  
>
>I was at a loss, as my toroids for beverage not in.  Read ON4UN book 
>some
>more and at the end of chapter on beverages the book states that a low
>dipole or low full wave loop is something that works, second only to a
>beverage.
>
>So, got the torch out and some wire and put up 510 feet of wire about 
>12
>feet off the ground in  sort of  a squished square.  Noise down about 
>3 s
>units.
>
>I worked my first european tonight.  Used the loop to receive, and 
>compared
>to the L.  The L was far noisier, and the crashes took out about 50 
>percent
>of his transmission. Very good copy on the loop.
>
>My question is--- drum roll--and put your thinking caps on-- Is this
>antenna directional?  I can't tell anything so far, seems to work 
>equally
>well/poor in all directions.  It is fed from the north east corner and 
>is
>about 105 feet on the north south legs and 150 feet on the east west 
>legs.
>
>I ran it through a tuner and into the rx jack of the corsair with the 
>front
>end saver box hooked up.  The feed is open wire, about 15 feet of it.
>
>I am starting to have some fun now.
>
>Mike Michon
>AB5XP
>44033 Hwy. 42 
>Prairieville, La 70769
>michon@eatel.net


I tried one almost identical to yours many years ago. It worked the same
as you described and was also the only thing that I had to listen South.
All my Beverages were W , NW or NE due to property lines. 
It was then that I tried the Slinky Beverage which did show directivity
and had better SNR than the low loop. At that QTH I used 5 Slinky's
stretched over about 150'.

73   Carl  KM1H
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