You also have to mention that you need to feed it 1/4 wave down from the
apex for vertical polarization. Feeding it at the apex or in the middle of
the base leg makes it horizontal, bad for low angle.
Bob W6TR
----- Original Message -----
From: "Robert Hess" <w1rh@yahoo.com>
To: <towertalk@contesting.com>; "fraz1" <fraz1@bellsouth.net>
Sent: Tuesday, June 24, 2008 10:33 PM
Subject: Re: [TowerTalk] Delta Loop compared to Dipole (actual experience)
> John,
>
> I have had terrific luck with loops over dipoles. Although there is some
> gain involved with the loop, depending on orientation, the big difference
> is noise and the loop wins big-time. They are very quiet antennas.
>
> At my former QTH, near Boston, where I had to compete with the really big
> YCCC guns, my 80 meter, full-wave-vertical-rectangular-loop was just
> awesome on 40 meters. I can't tell you how many times I could beat out
> the big guns when calling a rare mult. I also "felt" very "loud" on 40
> when running Eu's. The 80 meter loop has a 4-leaf clover pattern, but
> when oriented correctly (in my case with one lobe at 30 degrees or so) it
> plays very well. The loop I built was 40 feet vertical and 100 feet
> horizontal, hung from two pine trees at about the 60 foot level. At the
> lowest point, it was only 15 feet above ground. It also performed well on
> 80.
>
> At my current W6 QTH, I have an 80 meter full wave delta loop. Not quite
> as high above ground at the high point, but I do live on a hill that drops
> 1000 feet vertical in 3500 feet horizontal. It also plays very well on 40
> (and 80) but I plan on playing around with different wire antennas (and
> maybe some vertical arrays) on 80 and 40 from this hilltop location.
>
> Both loops were/are fed with 600 ohm ladder line, using a Johnson
> Matchbox. I run the legal limit.
>
> Both loops perform OK on all other bands, but can't compete with the
> beams. I rarely use my loop on the bands above 30 meters.
>
> Bob
> W1RH
>
>
> --- On Tue, 6/24/08, fraz1 <fraz1@bellsouth.net> wrote:
>
>> From: fraz1 <fraz1@bellsouth.net>
>> Subject: [TowerTalk] Delta Loop compared to Dipole (actual experience)
>> To: towertalk@contesting.com
>> Date: Tuesday, June 24, 2008, 1:27 PM
>> Hello....
>>
>> I'm going to pick brains once again. I am familiar
>> with the antenna models for these antennas. Does anyone
>> have actual comparisons of a Delta Loop and 1/2 wave Dipole
>> on 40 and 20 meters? A top height of 70 feet can be
>> achieved. The Loop can be Delta or any other Loop
>> configuration; vertical or horizontal feed. In short,
>> I'm trying to determine if any Loop configuration
>> offers a real advantage over a high 1/2 wave Dipole.
>> Again, I know what the models say....what was/is your
>> actual experience, please?
>>
>> Thanks, and 73........... John K4NP
>> _______________________________________________
>>
>>
>>
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>
>
>
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