Here at N1UR, my phase 1 was to install 15/20/40 on one mast with 14 feet of
mast above the tower. I configured it 40 on top (minus the 3 1/2 feet for the
boom truss rope), 15 in the middle, and 20 feet just over the tower. This will
eventually be changed when Tower 2 goes up in the summer of 2006.
I knew it would be a compromise situation from the start. The 15 meter beam (a
F12 3 el on 12 foot boom) interacts with everything. The 40 (an EF240X) is at
90 degs to the 15 beam and they work fine that way. They were really screwed
up in parallel with 6 foot spacing. The 20M did not work well in parallel to
the 15M with 4 foot spacing. It only worked well at 45 deg to the 15.
So there I have it. Kind of looks wierd, but plays well. It will do until
next summer. In the meantime, I have a cheat sheet to keep everything straight.
Ed N1UR
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See: http://www.mscomputer.com for "Self Supporting Towers", "Wireless Weather
Stations", and lot's more. Call Toll Free, 1-800-333-9041 with any questions
and ask for Sherman, W2FLA.
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