Hi it's an interesting discussion about the dipoles. I want to put up an
inverted vee dipole for 160. I can put the apex at 15,30,45 or 60m and have
>90 degree apex angle. The ground is very good and I am right on the
magnetic equator. >>>
I'm sure what works here is different for you, but I never saw much
difference at sunrise peaks between various dipoles at different
heights....and my antennas were hundreds of feet apart and tuned to avoid
interaction. My really high dipole had a decided advantage over low dipoles
at off-peak times, but never was better than a modest vertical. My high
dipole was a toss up with low dipoles during peaks or aurora, and with the
vertical.
An inverted Vee dipole has a pattern almost like a regular dipole with legs
much >90 degrees. It just has a little less null off the ends (where pattern
is tilted to nearly vertically polarized). An inverted Vee dipole is pretty
much like any dipole except at slightly lower effective height, the main
difference is less end null.
I can't imagine any performance advantage to a dipole intentionally lower
than 45 meters on 160 meters, let alone an inverted Vee dipole. The pattern
does not change significantly at useful angles over that height range,
except for increased losses at lowest heights.
The biggest differences would be between a vertically polarized antenna and
a dipole, not between various dipoles all below 1/4 wave effective height.
It isn't like you can have a dipole with high angle suppression or low angle
enhancement when they are that low. I'd just put up the highest one you can
manage.
73 Tom
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Topband reflector - topband@contesting.com
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