I've been having considerable success with the resonant feedline dipole
(RFD) antenna as was described in QST a few years back and also in the '04
ARRL
Handbook. Its basically a 1/4 wavelength of antenna wire followed by your coax
feeder into the shack. Where they connect, the coax shield is left floating.
Some of the feedline is wound into a choke at the 1/2 W/L point or
thereabouts, decoupling and forming the dipole. (Position the choke for lowest
swr.)
With the far end pulled up high, they are good for long haul DX. I have one
cut for 40m and it works well with low swr on 30m, 17m, 15m. and 10m. Another
one for 20m rounds out the little farm. Mine aren't exactly vertical (kind of
exponentially curved) and seem to be a bit directional.
YMMV of course.
Bill K3UJ
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