[Elecraft] Re:QRP Antenna
Stuart Rohre
rohre at arlut.utexas.edu
Thu Feb 23 22:27:17 EST 2006
Verticals are probably preferred for tight locations, and in any case have a
nice low angle of radiation even given ground mounting, or low elevated
mounting. Of the two, if you can get the antenna up six or more feet, so
much the better. Then you could use gull wing elevated radials to improve
it further without needing more than say 8 radials. If you have few
radials, be sure to put them in the directions of ham population centers.
Don't forget that you can use long path to advantage when attempting to work
DX. Long path can be skewed from the great circle projection so if the
dipole is not aligned perfectly, it may still work for you. When using an
inverted Vee, you "might" get some gain putting a director wire slanted on
one side, to augment radiation in the desired direction. The sloping Vee
beam idea from Ten Tec is also of merit for the higher bands when they are
open. 100 foot legs or more, and try to have the antenna 30 feet high at
the apex of the vee, where you feed it. Ten Tec model is terminated, but
non terminated is easier, and then will give you bi-directional coverage,
albeit one at a high angle and the other low. Still might make for
interesting DX. I have used 5 wave legs on a Vee beam at 10 meters, and I
can testify that is a DX burner!
-Stuart
K5KVH
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