I have a question regarding the 1/4 wave slopers.
The coax shield goes to the tower at the top.
Do you need radials at the base of the tower in order
for the sloper to work properly??
I have a 70 foot tower and would like to try a sloper
for 80 meters.
Thanks in advance for any suggestions...
73, Ted K2QMF
On Tue, 10 Oct 2006 20:01:29 +0200 (CEST) LA6FJA/K3RAG Stein Roar
Brobakken <s-roabr@online.no> writes:
> 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
> >
> > _______________________________________________
> >
> >
> >
> > _______________________________________________
> > TowerTalk mailing list
> > TowerTalk@contesting.com
> > http://lists.contesting.com/mailman/listinfo/towertalk
> >
>
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