[TowerTalk] Questions on M2 antennas...to

[john at kk9a.com]

You can move the center of gravity by adding a weight to the boom.  I had to
do this on my homebrew 20m.

John KK9A



To:	<towertalk at contesting.com>
Subject:	[TowerTalk] Questions on M2 antennas...
From:	"StellarCAT" <rxdesign at ssvecnet.com>
Date:	Fri, 3 Apr 2015 18:52:57 -0500

I'm thinking of a 2 stack of the M2 15M6DX. Both antennas would be mounted 
across the face of Rohn 55 (rotating tower)... unfortunately their manual 
doesn't say what the distance is to the mast/balance point and it looks
rather 
close to D2. I asked the factory what the distance was and even though its
been 
in production for years - they basically said they didn't know and didn't
have 
a CAD drawing for it! Seems very odd to me ... so instead I'm here asking if

anyone has one of these up and if they know what the approximate distance is

from the balance point to the closest element? 

I'm also considering a 40M4LLDD (although the comments by some about linear 
loading tend to worry me - the reviews from those that are using it are all 
positive - albeit without a direct A/B comparison we all know how relative
it 
all is) ... and was wondering if anyone has one of these close to either a
20 
and/or a 15. I'm planning on ~12' from the 20 to the 40 and ~31' from the 40
to 
the top 15... looking to see if there's any interaction at all. I can move
the 
40 to a different tower with a bit more work IF indeed there is some 
interaction noted. 

Thanks to those that own one for their comments.

Gary K9RX
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