How these antennas from The Hypower Antennas compare with
antenna made with Unadilla's W2VS high performance traps
on the same band, like 160/80/40 band?
73' Samir
Samir Popaja, 7S7V (SM7VZX)
http://www.qsl.net/7s7v/
___________________________________________________
On Sun, 14 Dec 2008 07:55:41 -0800 (PST), Gary Slagel
wrote:
>Also, I'm planning on 2 antennas 90 degrees from each other.
>Should I make sure and get a balun on the thing so that I get
the
>uniform pattern I'm expecting?
The Hypower Antennas are good designs. I've had several of
their longer ones in the air and like them a lot. They are
a very good solution for limited space.
See
http://audiosystemsgroup.com/LimitedSpaceAntennasPPT.pdf
You should always use a good common mode choke at the
feedpoint, but NOT a conventional "balun."
See
http://audiosystemsgroup.com/RFI-Ham.pdf
Are you thinking of two antennas on the same feedline, or
two dipoles, each on its own feedline? You would need a
transformer to put two on one feedline, and you would end
up with a pattern that was approximately omni. If you have
space, separate feedlines is much better -- you get 3 dB
more gain from the directivity.
73,
Jim Brown K9YC
Best Regards
Samir, SM7VZX (7S7V)
www.qsl.net/7s7v
www.sk7mw.se
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