[TowerTalk] Delta Loop Feed

[Jim Lee]

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 at citlink.net>
To: "Wilson Lamb" <infomet at embarqmail.com>; 
<towertalk at 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 at 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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