Take a look at section 6 of chapter 11 of ON4UNs book.
There is a whole discussion on a configuration very similar to what you
propose.
Greg N2GZ
On Dec 6, 2015 8:07 PM, "Rudy Bakalov via Topband" <topband@contesting.com>
wrote:
> I am in the process of clearing land for full size 80m 4SQ. I have two
> questions for the group:
>
> 1) How much and what kind of degradation should I see if I place the 4SQ
> elements around my tower. The tower is 90' and has a 4 el 40 m yagi at 90'
> and 6 el tribander at 105'. Currently I have no plans to detune the tower,
> but do have plans to use it as a 160m TX antenna.
>
> 2) If the consensus is to move the 4SQ away from the tower, how far should
> I move it? Also, in what direction should I move it with respect to the W
> and S elements of the 4SQ.
>
> Rudy N2WQ
>
> Sent using a tiny keyboard. Please excuse brevity, typos, or
> inappropriate autocorrect.
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