Date: Mon, 4 Jan 2016 12:59:05 -0500
From: Wayne Kline <w3ea@hotmail.com>
To: "towertalk@contesting.com" <towertalk@contesting.com>
Subject: [TowerTalk] F 12 EF 180 .
All this great conversation on the evolution of the F12 loading wires to
then loading coils and there
development . Got me thinking about my Summer 16 project. I have a F 12 EF180
rotation dipole antenna
Having a 4 sq and HIGH dipole , I hope to modify it to 30 meters !!
I am not sure if Tom ever made a 30 meter rotating dipole but if he did
again I assume it's loading
configuration is along the linear loading wire design .
Might try to adapt the lumped inductor to the transition ? thoughts ?
Wayne W3EA
## The EF-180 was made in 3 x versions, EF-180S... aprx 52 ft long.
EF-180B..aprx 68 ft long. And the EF-180C..aprx 86 ft long.
## A 30m rotary dipole will only be aprx 46-47 ft long...so regardless
of which version of the EF-180 you have, like grant sez.... just toss the LL
wires, shorten the ant, and maybe add a single dacron truss on each side.
## a high 80m wire dipole works good. And a high 80m rotary dipole works much
better..
esp with its 14 db FS on DX. Either of those is 6db better than an inverted
vee. A local fellow here has
2 x 80m high dipoles..at right angles to each other.... like a T. Then coax
to each one.
Makes a huge difference when switching between them.
Jim VE7RF
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