In a message dated 10/19/2008 6:34:20 A.M. Pacific Daylight Time,
towertalk-request@contesting.com writes:
> I have 2 yagi's, a C31XR and a 3el 40M (old KLM) I just
refurbished and put up underneath it. As long as the two
booms are lined up. All is fine. (At least that makes it simple :>)
If they start pointing in different directions, the
20M SWR starts rising.
The old KLM 40's were the ones that people would put 90 degrees out from
the other antenna because of the interaction. If they were on the same mast,
it'd be easier to set-and-forget. Methinks you'll have to constantly
re-align both antennas when you're operating to minimize the interaction in
your
current configuration.
The boom length might not be the problem but the element lengths. That's
why Force 12 has an N-version with non-resonant elements.
Cheers,
Steve K7LXC
TOWER TECH
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