[Amps] OT: 4 square query

[David Cutter]

In my modelling exercises with 4 squares I have found that almost anything 
near a 4 square will upset it and it doesn't have to be even near resonance. 
>From memory, anything from about 0.3 of the height.  Other masts and towers 
have a bad effect on f/b but not much on gain as such.  This works out in 
practice, too.  At my contest site (G6M, G6MC, I'm not there anymore) I got 
poor directivity in one direction with other towers when on the 80m 4square.

I developed a passive array which is not affected and I am hopeful can be 
arranged as nested set for several bands.  It's all theory at this stage but 
I'll try it on higher bands first where I have the land to try it.

David
G3UNA


> Can an 80M 4 square be placed inside a 160M version without serious
> degradation?
> Both will use the pretty standard 1/4 wave spacing system of firing down
> the long base line.
>
> Havent been able to get a definitive answer elsewhere.
>
> Carl
> KM1H
>