On Mon, 2 Aug 1999 23:34:16 -0500 "Phil Clements" <firstname.lastname@example.org>
The bad thing about the interaction is you do not know
what kind of pattern skewing is happening on 40 m also.
It is highly unlikely that any high band elements will affect 40M
when the booms of the high band antenna and 40M beam are parallel.
This is due to the fact that all high band elements are less than 50% of
half wavelength on 40M.
If the booms are rotated 90 degrees to each other, it is quite possible
the tribander boom, end loaded by 20M elements, to interact with the 40M
beam since a 24 ft boom end loaded by 20M elements is self resonant
at approximately 7.5 MHz ( I arrived at this conclusion after measuring
the self resonant frequency of an exact half scale 10M beam on a 12 ft
boom which grid dipped at 15 MHz.)
de Tom N4KG
re: increased SWR on 17M, the simplest solution is to just live with it.
Either use a tuner to get a better match, or just tune for maximum
power output. A 2:1 SWR isn't going to reduce efficiency by a
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