[TowerTalk] Tribanders on separate towers

Gary Johnson gwj at me.com
Tue Feb 3 14:36:23 EST 2026


The pattern can get kinda strange when Yagis on separate towers are both driven. Odd lobes and nulls depend on pointing and may not be intuitive. AC6LA has an example generated with AutoEZ. YMMV. Simulation advised.
https://ac6la.com/aecollection5.html#:~:text=have on hand.-,Coupled Yagis on Separate Towers,-A question was <https://ac6la.com/aecollection5.html#:~:text=have%20on%20hand.-,Coupled%20Yagis%20on%20Separate%20Towers,-A%20question%20was>

-Gary NA6O

> 
> Subject: [TowerTalk] Tribanders on separate towers
> 
> Hello Towertalk 
> 
> I?ve been considering installing multiple triband Yagis (interlaced element types, say 4/4/8) at my QTH to be able to switch directions quickly or power split in multiple directions. Installation heights can be between 50-120? and the towers are between 100-200? apart. Some time ago ISTR Frank W3LPL saying this arrangement would need careful modelling (maybe it was on a CTU presentation) but I?ve not been able to find this information since.



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