There's at least one company that markets vertical dipoles: Force 12. I have
their Sigma 80, which is an off-center-fed vertical dipole. It seems to work
quite well, though it doesn't do well at all on short-haul skywave paths for
obvious reasons. At one time, F12 was going to make one for 160 m, but it never
seemed to do what they wanted and, as far as I know, is not marketed. The Sigma
80 has a lot of aluminum in it and so is pretty pricey. Anything like it for
160 might simply not make any marketable price point.
Kim Elmore N5OP
----- Original Message ----
From: Barrett Thompson <barrettthompson@comcast.net>
To: tentec@contesting.com
Sent: Fri, January 7, 2011 2:21:12 PM
Subject: [TenTec] Vertical Dipole for 80/160m
The discussion about vertical dipoles has been very enlightening. For some
time I've been eyeing the following vertical dipole (that's what it really
is, even though the author calls it a Double-L) for 80m + 160m. The key
innovation is that you can 'bend' the ends of any dipole without affecting
the radiation pattern too much, so why not bend them for the VD and shorten
the height requirement needed to get that VD up in the first place?
http://www.yccc.org/Articles/double_l.htm
This could work on a 40m VD as well, so even with far less height than 66
ft. plus ground clearance, one could have a great performer -- perhaps with
as little as 40 ft. of vertical height available.
Barrett / KE4R
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