I think that if its broken with an insulator then it looks like two
verticals in phase??
WH6H
On Wed, Feb 3, 2010 at 6:48 PM, Jim Lee <jtlmd@blackhole.com> wrote:
> How can it be a "full wave loop" on 80 meters if
> there is a break with an insulator on the bottom ?
>
> J. Lee
> K5KKV
>
>
> ----- Original Message -----
> From: "N7mal" <n7mal@citlink.net>
> To: "Wilson Lamb" <infomet@embarqmail.com>;
> <towertalk@contesting.com>
> Sent: Wednesday, February 03, 2010 6:26 PM
> Subject: Re: [TowerTalk] Delta Loop Feed
>
>
> >
> > Here's what I use: It is an 80M delta loop fed
> > at the TOP with 600 ohm open
> > wire line. It is an 'open' loop, in other words
> > there is an insulator in the
> > center at the bottom. This antenna
> > mathematically is a 1/2 wave on 160M, a
> > full-wave loop on 80M, a 2 wave loop on 40M.
> > I don't believe in modeling antennas. If you put
> > up an antenna and it works
> > leave it up. This antenna has been up more than
> > 5 years. If an antenna
> > doesn't work take it down and try something
> > else. Computers don't work DX,
> > my station works the DX.
> > Best 73
> >
> > p.s. I've tried feeding it at the bottom in the
> > center, and I've tried
> > feeding it at a corner, I finally settled on
> > feeding it at the top.
> > 73
> >
> >
> > MAL
> > N7MAL
> > BULLHEAD CITY, AZ
> > http://www.n7mal.com
> > Everyone in the world is
> > entitled to be burdened
> > by my opinion
> >
> >
> > ----- Original Message -----
> > From: Wilson Lamb
> > To: towertalk@contesting.com
> > Sent: Wednesday, February 03, 2010 22:32
> > Subject: [TowerTalk] Delta Loop Feed
> >
> >
> > I have no good experience and haven't modeled,
> > BUT we did put up a 40m delta
> > at FD one yr.
> > It was an interesting exercise.
> > We left the wire free to run at the corners,
> > connected an analyzer, and slid
> > the wire around until we got a match. Sho 'nuf,
> > perfect 1/1. As I recall,
> > the feed ended up near one corner.
> >
> > We made lots of contacts and rarely had to call
> > twice, even in FD condx!
> >
> > Wilson
> > W4BOH
> > _______________________________________________
> >
> >
> >
> > _______________________________________________
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> > TowerTalk@contesting.com
> > http://lists.contesting.com/mailman/listinfo/towertalk
> >
>
>
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