I have my C31XR at 93 feet. My XM-240 is below it (as recommended by the
HFTA program for EU) at 73 feet on a gate. with 20 feet of separation I
have noticed no interactions Even when all 3 antennas are pointed in the
same direction or when they are offset. For Sweepstakes last year, since I
also have a C4 here, I put that up below the XM-240 for SS on another gate
at about 42 feet. The C31 and C4 were NOT phased and since the C4 20 m
elements barely had room to turn underneath the top guy wire, I was unable
to put the 40M element on the C-4 so it functioned as a C3E. I had no
interactions between any of these antennas that I could detect. When I spoke
to N6BT he recommended at least 13 feet between the C31 and the XM240..
press on regardless
----- Original Message -----
From: "Gary Slagel" <email@example.com>
Sent: Saturday, February 02, 2008 10:10 AM
Subject: [TowerTalk] Interaction between yagis on the same mast
>I want to have gain antennas for 10/15/20/40 on top of
> my tower and am trying to decide between a 4 band
> antenna like the Force 12 C4XSL or a tribander and a
> separate 40m yagi on the same mast. Struggling with
> which is worse, interaction from having the 40M
> elements interlaced on the same yagi or interaction
> from having the two antennas stacked vertically.
> I'm leaning toward two separate antennas separated by
> about 10 feet and one oriented perpendicular to the
> Does anyone have any opinions?
> Gary Slagel/N0SXX
> Lakewood, CO
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