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[TowerTalk] 40 and 15 beams on same mast?

To: <towertalk@contesting.com>
Subject: [TowerTalk] 40 and 15 beams on same mast?
From: w1nr@eecorp.com (Michael McCarthy)
Date: Thu, 18 Mar 1999 07:25:37 -0800 (PST)
Does anyone have any REAL data or experience with mounting a 15M beam
10' above a 40M beam?  The concensus is that 15 and 40 interact too
much.  But all I have heard is opinion and conjecture.  I know several
who have put 40M beams above tribanders and the interaction does not
seem to be much of a problem.

I am considering a F12 EF-420/240 20M/40M interlaced beam and would
like to add a 4L 15 about 10' above it on the same mast.

Please, I have heard enough opinion and guesswork.  I would like to
hear from anyone with hard data or experience based on actual
installations or accurate modeling.

Tnx and 73 de Mike, W1NR




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