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Re: [TowerTalk] Delta Loop compared to Dipole (actual experience)

To: <w1rh@yahoo.com>, <towertalk@contesting.com>, "fraz1" <fraz1@bellsouth.net>
Subject: Re: [TowerTalk] Delta Loop compared to Dipole (actual experience)
From: "Bob Maser" <bmaser@tampabay.rr.com>
Date: Tue, 24 Jun 2008 22:40:26 -0400
List-post: <towertalk@contesting.com">mailto:towertalk@contesting.com>
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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