On 2026-04-15 2:15 AM, Jim Brown via TowerTalk wrote:
Old hands here can probably tell us who did those two designs. They
were the AV-series and R-series.
The R-series verticals were designed by W1JR at the original Cushcraft.
The AV-series were an adaptation of the W1JR design by "Hy-Gain" after
both were acquired by MFJ.
73,
... Joe, W4TV
On 2026-04-15 2:15 AM, Jim Brown via TowerTalk wrote:
On 4/14/2026 10:11 PM, David Gilbert via TowerTalk wrote:
Hy-Gain or Cushcraft antenna anymore when there are more modern
designs available?
Both companies made center-fed loaded multi-band HF dipoles that tests
by N0AX and K7LXC c. a. 2001 showed to be excellent performers. They do
not require radials. Their tests were done with all antennas mounted at
ground level.
About ten years ago, I published an extensive modeling study showing
that performance of these antennas benefits from being mounted on the
non-conductive roof of typical residential homes. The improvement is for
two reasons -- reduced coupling to lossy earth under the antenna, and
lowering the vertical lobe by the increased height the antenna's current
maxima.
Old hands here can probably tell us who did those two designs. They were
the AV-series and R-series.
http://k9yc.com/VerticalHeight.pdf
Slides for talks at Pacificon and Visalia
http://k9yc.com/AntennaPlanning.pdf
Text version for NCJ, which was prepared by the editor but which ARRL's
graphics department decided was too much work. It included a companion
study on the height of horizontally polarized dipoles.
73, Jim K9YC
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