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Re: [TowerTalk] 40 meter sloper question

To: <john@kk9a.com>
To: <TOWERTALK@contesting.com>
Subject: Re: [TowerTalk] 40 meter sloper question
From: LA6FJA/K3RAG Stein Roar Brobakken <s-roabr@online.no>
Date: Tue, 10 Oct 2006 20:01:29 +0200 (CEST)
List-post: <mailto:towertalk@contesting.com>
Hi

I have this same system at 80m, very sharp angle to tower.
but I bend the last 3 meter of the 1/4 wave back to the tower
good luck with antenna :)

73 LA6FJA K3RAG





> From: john@kk9a.com
> Sent: 2006-10-10 18:22:49 CEST
> To: TOWERTALK@contesting.com
> Cc: kmohror@comcast.net
> Subject: [TowerTalk]  40 meter sloper question
> 
> With a 1/4 wave sloper, the tower is the radiator.   W8JI would say it's
> just luck if it works.
> 
> John KK9A
> 
> 
> 
> To: <towertalk@contesting.com>
> Subject: [TowerTalk] 40 meter sloper question
> From: "Kirk Mohror" <kmohror@comcast.net>
> Date: Mon, 9 Oct 2006 21:03:45 -0700
> List-post: <mailto:towertalk@contesting.com>
> 
> Explain this one.
> 
> 
> 
> Built a 40 meter ¼ wave sloper Sunday. Because of a 3 element quad, I could
> only put it up at 33 feet. Grounded the shield to the tower and ran 35 feet
> from the center conductor. Walked the wire out from the base to get an angle
> of 45 degrees and stated to tune the antenna. Cut about 6 feet off the wire
> and could not get the swr below 4:1. Moved the wire in closer to the tower
> and retrimed the wire. Here is the strange part. I got a swr of 1.7:1 only
> by having the end of the wire about 1 foot off the ground only 8 feet from
> the base of the tower. The wire is tight and is tied to the ground 1 foot
> from a chain link fence. The fence is 9 feet away from the tower.
> 
> When I checked the antenna, it received about 3 to 4 S units higher than a
> dipole. Have not transmitted on it yet. The 1.7:1 swr is from 7.00 Mhz to
> 7.30 Mhz.
> 
> This does not sound right. There wire is too close to the tower, too sharp
> of an angle and too flat of a swr.
> 
> Do I have of fluke of an antenna and should I shut up and just use it? Or is
> this antenna not right and won?t do me diddily squat?
> 
> 
> 
> Thanks,
> 
> Kirk Mohror
> 
> K7EKM
> 
> _______________________________________________
> 
> 
> 
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