Thanks for the input. I don't have the lot size or supports to get
the loop any higher then what I have which is 30 ft at the highest
point. The apex is pointed down and at about 6 foot off the
ground. The antenna works great positioned as is, just courious
what I would gain by going horiziontal with it at say 25 feet. From
what I understand it is a bit directional moounted verticial. I
guess all I can do is try. Every instalation is different and I
need to try and see what works best for my location.
73,
Will
W6AAV
--- In loopantennas@..., Jim Dunstan <jdunstan@...>
wrote:
At 06:15 AM 2/28/2007 +1300, you wrote:
What is a sky wire ?
278 feet is around a full wavelength
Keith
----- Original Message -----
From: "willmcray" <<mailto:w6aav%40comcast.net>w6aav@...>
To: <<mailto:loopantennas%
40yahoogroups.com>loopantennas@...>
Sent: Tuesday, February 27, 2007 2:52 PM
Subject: [loopantennas] Super Loop 40/80m
I just built a super loop antenna for 80/40. It also works well
on 10-
20. I have it vertically polorized. I have heard that positioning
it
horziontal will provide better performance. Has anyone out here
with
experience with this antenna. I thought of building a skywire for
80m,
but I can't support 278 feet of wire. Currently I have 218 ft and
I
can work with that as the very most.
Any help would be helpful.
Will
W6AAV
Hi,
'Sky Wire' is a euphemism for an antenna system with lots of wire
arranged
in one way or another in a loop arrangement .... in early days
they were
generally arranged in a vertical configuration while more recently
the
horizontal arrangement is popular. If designed to be naturally
resonant at
a particular band they are 1 wavelength in circumference and can
be fed
with a coax feed line. If not resonant, or more than 1 wavelength
they are
generally used multiband. In this case they are fed with balanced
open
wire feed line and tuned with an antenna tuner. Performance is
generally
unpredictable and mostly a necdotal.
I know that a 1 wavelength loop that is vertically oriented with
the center
at least 1/2 wavelength above ground is a 'hot' performer. I
have had
mixed results with the 'lots of wire' horizontal 'Sky Wire'
approach. Height above ground beats mult-wavelengths every time.
Jim
[Non-text portions of this message have been removed]
