I have a 4BA 11ft above a EF320 and it works fine. I know this is not
exactly what you asked about but I thought it might be close. Tom at Force12
told my to put the 4BA above the EF320 I would gues the same recommendation
would hold for the EF420. He said the pattern would be bad with the EF320
73 Steve W8GAZ Minnetonka MN
From: Mike <email@example.com>
To: firstname.lastname@example.org <email@example.com>
Date: Sunday, June 28, 1998 11:25 PM
Subject: [TowerTalk] Shucks!
>Well using the recent mathematical equations and doing a little modeling
>(out of cut and taped qsl cards(I knew there was a reason to keep them)).
>My Plan for a stacked pair of TH7's will not work as I will only have about
>19.5 feet of distance between the tower and the guy at that level.
>So now I am "re-planing" I have looked at the possibilities of all Force 12
>antennas. (Sure they are happy to hear that).
>The questions are:
> 1. Has anyone ever put a 4BA and a EF420/240 on the same tower, if so how
>far apart do they need to be and would the system work ok with a EF180
>between them(Maybe later)?
> 2. I am sure the forces are gunna be tremendous on the mast so what would
>I use for that? Would I have to buy the Chrome molybdenum mast for this?
> 3. Would the T2X still turn all of this ok?
>This is still not set in concrete yet so I am still somewhat flexible about
>what happens upon the tower. The tower should have no trouble handling
>whatever I want to put on it. Maybe I will take K6LL's idea and put the
>ferris wheel on it.
>Thanks for the time, and if there are any good ideas out there about what
>might make a better combination please let me know. I realize that I am not
>going to have 30 meters with this arangement so anything that could include
>that might be even better.
>Check out my home page at http://home.inreach.com/no6x
>FAQ on WWW: http://www.contesting.com/towertalkfaq.html
>Administrative requests: towertalk-REQUEST@contesting.com
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