[TowerTalk] Stacking Tribanders

[John Langdon]

It can tell you how each antenna will do individually but does not calculate the combined patterns exactly.

73 John N5CQ

-----Original Message-----
From: TowerTalk <towertalk-bounces at contesting.com> On Behalf Of David Gilbert
Sent: Tuesday, June 21, 2022 1:01 PM
To: towertalk at contesting.com
Subject: Re: [TowerTalk] Stacking Tribanders


HFTA should never be used to try to optimize stacking distance.  It simply does not actually calculate the stacking gain as a function of stacking distance like EZNEC would.

73,
Dave   AB7E



On 6/21/2022 10:34 AM, sawyered at earthlink.net wrote:
> HFTA kinda sorta calculates stacking properly.  It seems to assume you 
> get the optimum 2.7db stacking gain whether the spacing is optimum or 
> not.  And it draws the HFTA ray from the center point between the 2.  
> So it would calculate a 2 high stack of 20M yagis having an added 
> 2.7db of gain even if they are stacked only 20 ft apart and will draw 
> the enhanced ray from the midpoint between the 2 yagis.
>
>   
>
> Ed
>
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