[TowerTalk] Stacking a 2L 40M and Tribander

[john at kk9a.com]

Putting the 40m beam on top has two benefits. Since it is the smaller
antenna there will be less mast stress and since it is a lower frequency
beam it should be higher.  The tribander below it will have no effect on
the radiation angle.

John KK9A


To:	<towertalk at contesting.com>
Subject:	[TowerTalk] Stacking a 2L 40M and Tribander
From:	"Marsh Stewart" <marsh at ka5m.net>
Date:	Fri, 17 Oct 2014 10:04:56 -0500

My tower is a US Tower HDX-555. I'm planning to stack a compact 2L 40
monobander and a larger tribander on the same mast 10' vertically apart.
Which antenna should be on top?

The 2L 40M is lighter and has about half the wind load area of the large
tribander. So mechanically it should be on top. But, will it "shield" the
tribander and degrade its performance?

Marsh, KA5M