> Not that my not hearing about it means it's wrong. No, I'm not saying
> that. What I am saying is that, since this is the first time I've
> heard anyone say what you've said, and I've been a ham for over 40
> years and plugged into publications, listserves and clubs where these
> types of things might be brought up, I'm wondering if it's a
> wide-spread problem or not. I suspect not, since I've not heard of
> it. And if it's not widespread, what then?
I just modelled a two element phased array, and adding a "non-
resonant" wire right in the middle of a recommended "safe length" 1/8
wl below the phased array center decreased the null from almost
infinite to less than 20dB. It made a very profound pattern change in
Obviously it is also important guy wires be short compared to 1/2 wl
at the operating frequency, at least near a directional antenna.
I agree with the insulator capacitance problem. The grips and
insulators can also change things, I'd bet in some cases a large
amount.73, Tom W8JI