A spacing as small as 40" works okay. I've stacked 6m and 2m beams on a common
mast for many years (since 1966 anyway) and once I reach about 1/2WL on 2m
(40") I never notice any interaction as long as the beams are both horizontally
polarized. Vertically polarized beams are a whole different story!
WB2WIK/6
________________________________
From: towertalk-bounces@contesting.com on behalf of jim Jarvis
Sent: Fri 7/3/2009 12:30 PM
To: towertalk@contesting.com
Subject: [TowerTalk] VHF beam spacing?
Folks,
I've got an M2 6m5x, 5 elements on six meters, which will mount on
a pole-mounted
rotor. (G1000dxa). I want to put a small 2m yagi above that.
Does anyone have a
sense of minimum spacing required?
Obviously, I want to minimize the mast length above the rotor, so its
a tradeoff between
isolation and physical load on the rotor mast-clamp.
Thoughts?
N2EA
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