What exactly is a "gain J-pole"? Am familiar with J-poles, but... Sounds
interesting.
--John
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Our ultimate solution was to replace the copper pipe
dipoles with a gain J-pole made out of #12 copper wire
and hung inside the radome from the tip. The J was
found to have feed line reflections which was solved
by adding a coaxial stub at the exterior feed point. This
flattened the line and preserved the radiation pattern of
the J. A lot of fussing but the end result was a light
weight antenna with a gain and radiation pattern very close
to that of the original Stationmaster.
