[SECC] [TowerTalk] 6 mtr quad

[wb4sq]

44 ft is good for a wide spaced 8 el 6M quagi.

-------- Original message --------
From: Bill Coleman <aa4lr at arrl.net> 
Date: 09/06/2016  2:47 PM  (GMT-05:00) 
To: "Richard (Rick) Karlquist" <richard at karlquist.com> 
Cc: secc <secc at contesting.com>, Towertalk at contesting.com, ACG <contest at alabamacontestgroup.org> 
Subject: Re: [SECC] [TowerTalk] 6 mtr quad 

Perhaps a Quagi design would suit — a Quad Driven-Element and Reflector, followed by multiple dipole directors. 

> On Aug 30, 2016, at 10:01 PM, Richard (Rick) Karlquist <richard at karlquist.com> wrote:
> 
> A quad driven element is like a vertical stack of two
> bent dipoles.  It can easily be determined from your
> favorite NEC program that the "stacking gain" is about
> 1.25 dB for the 1/4 wavelength stacking distance.
> 
> A quad type beam is like a vertical stack of two yagis,
> with bent elements.  The fallacy you sometimes read
> about is the idea that the stacking gain in the multi-element
> case is the same 1.25 dB as for the dipoles.  However,
> stacking doesn't work that way.  As the quad boom gets
> longer, the stacking gain decreases.  A "monster" quad
> will have negligible stacking gain and be no better than
> a Yagi with the same element spacing on the same boom.
> 
> Maybe that it why you don't see > 7 element designs.
> 
> Rick N6RK
> 
> On 8/29/2016 4:52 PM, Courtney Judd wrote:
>> I have been thinking about building a monster quad for 6 mtrs. I have
>> googled quads and all about but came up with very little data to work
>> with. I did find a 7 el regular spaced quad on 19 ft boom but I was
>> thinking of more elements and wide spaced... I have several 44 ft 2 in
> Thanks, Cort K4WI
> _______________________________________________
> 
> 
> 
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George William Coleman              mail:  aa4lr at arrl.net
Senior Software Developer           phone: 770 978-0196

Bill Coleman, AA4LR, PP-ASEL        Mail: aa4lr at arrl.net
Web: http://boringhamradiopart.blogspot.com
Quote: "Not within a thousand years will man ever fly!"
            -- Wilbur Wright, 1901

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