On 10/22/20 7:39 PM, kq2m@kq2m.com wrote:
I really want to thank Jim, Jeff, Les, Mike, John and Gary for all of their
help, answers and ideas to which I have been giving a lot of thought this week.
The information gleaned has made me confident of the new design. Unfortunately
there is no way to avoid putting the 4-square elements around the tower so I
know that interaction effects will likely be noticed. Vicious storms have
taken down all the other tall trees that were previously in use to support my
80 meter 4-square.
Note to Jim Lux – I am particularly intrigued by your idea of changing the
feeding of the elements so that I can radiate broadside from the side of the array
rather than on the diagonal since the only trees that I have to support elements
happen to be roughly N, E, S and West, which, with the Comtek phasing box, would give
me radiation N, E, S and West rather than the desired NE, SE, SW and NW.
If you feed N and E the same, and S and W the same, but 90 degrees
advanced, then you'll form a beam to the NE (it's basically two parallel
2 element arrays)
The gain's not as good as the "shoot across the diagonal" (which is like
a 3 element "binomial" array, fed 1:2:1), but it will have a null to the SW.
The Comtek ACB-4 outdoor box uses the NW element in Pos 1 on the outdoor , NE
(2), SE (3) and SW in position 4 and arranged as shown in the .pdf:
www.static.dxengineering.com/pdf/comtek_4_square_info.pdf
Which elements (N, E, S, W) would you put in which positions on the box (so
that the 4-square radiates toward the NE instead of East?
How is the gain and F/B and F/S compared to the standard pattern that radiates
diagonally?
Tnx to all & 73!
Bob KQ2M
-----Original Message-----
From: Gary Johnson
Sent: Monday, October 19, 2020 12:49 PM
To: kq2m@kq2m.com
Cc: towertalk-request@contesting.com
Subject: Re: [TowerTalk] 4 square question
This article may be of some use to you in your 4-square adventures. It
also appeared in NCJ.
http://wb9jps.com/Gary_Johnson/Amateur_Radio_files/Four_Square_Rebuild_at_N6RO.pdf
-Gary NA6O
On 10/19/2020 9:00 AM, towertalk-request@contesting.com wrote:
From: TowerTalk<towertalk-bounces@contesting.com> On Behalf Ofkq2m@kq2m.com
Sent: Sunday, October 18, 2020 1:49 PM
To:towertalk@contesting.com
Subject: [TowerTalk] 4 square question
Hi,
I will be rebuilding several 4-squares this season as well as restringing them
in different trees due to Tornado damage (loss or destruction of many trees at
my qth) during Tropical Storm Isaias on August 4th. I have a few questions for
which I would appreciate your guidance....
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