[TowerTalk] Stacked Yagis on Tower Legs

[Steve Maki]

Mechanically, you want to distribute each antenna's twisting force 
across a tower face, rather than concentrate it on one leg (unless 
you're talking about a small UHF or VHF Yagi). if you pay attention to 
that, it makes no difference which "leg" it's on. So if you have the 
boom to mast plate attached to a leg, the antenna needs a stiffarm from 
the boom to another leg.

Electrically, if the tower face width is an appreciable percentage of a 
wavelength, the yagis should all be on the same side or leg of the 
tower. But for HF yagis on R45 tower for example, it won't make much 
difference.

-Steve K8LX



On 06/18/20 21:34 PM, Larry K4AB wrote:

> Is there any advantage or disadvantage to stacking Yagis
> on the same tower leg as opposed to mounting one Yagi on
> one leg, and the second Yagi on the opposite leg?
> 
> Either electrically or mechanically.
> 
> I recall some discussion on this topic before, but am unable
> to locate it in the archives.  Thanks.