Now I see my error. I checked at .35 wl spacing
and that will give about .5 wl on the diagonal.
Don´t know why I wrote 1.5 wl and 2 wl below,
my fingers are to fast for my brain.
Anyway, at .35 spaceing the F/B doesn´t seem
to get better, what I wrote below will happen.
Jim SM2EKM
-------------------
Jerry Muller wrote:
Actually you want to go to sqrt(2)/4 spacing. The gain and front to back
improve slightly.
73, Jerry K0TV
----- Original Message -----
From: "Jan Erik Holm" <sm2ekm@telia.com>
Cc: "'towertalk'" <towertalk@contesting.com>
Sent: Friday, November 19, 2004 10:06 AM
Subject: Re: [TowerTalk] 4 SQ arrays
Improved in what way? Did a quick check in NEC.
When going to about 1.5 wl spaceing, that will
give about 2 wl on the diagonal, two strong
aditional back loobes comes up in low elevation.
Hardly does anything to the strong high angle
rear loob which is very narrow and generaly isn´t
a big problem. Gain comes up with about .5 dB.
Do I miss something? I can´t see the improvement.
73 Jim SM2EKM
----------------
Roger D Johnson wrote:
For those using Comtek and other boxes that restrict
one to 90 and 180 degree phasing, you can get an
improved pattern by increasing the spacing between
elements. A half wave across the diagonal seems to
work well.
73, Roger
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