I have a Gap Challenger. Ground mounted. 3 25 ft
radials laying on the ground (no pattern). 302
countries confirmed. QRP 200 plus confirmed.
5BDXCC. WAZ. WAS. WAC. etc..
Painted light grey and sky blue. Neighbors think its a
sculpture. WORKS GREAT! What more can I say
Good luck, 73 Art W6KY
Fred N3CSY asked:
I'm another limited space, restricted community
ham (for now). I've been considering different
types of verticals which might be best. I THINK,
I'm looking for an antenna which:
- vertical ?
- no radials
- no counterpoises
- no guy-wires
- 40 thru 10
- maybe 4
Hey Fred,
Verticals - it's all I run. I've played with them and researched them
off and on for several years. I'm no expert but here is a quick summary
of what I've learned.
Vertical efficiency depends on ground conduction in two fields. Near
field (which can be enhanced by radials) and far
Actually, my antenna is similar. 28 Foot tall alum. radiator over a
field of sixteen 20 foot radials. Thirty feet of RG-213 connect the
antenna to the manual ATU in the garage. From there I run RG8x into the
shack. Changing bands requires that I go to the garage with my antenna
analyzer and
Message
From: Darwin, Keith [EMAIL PROTECTED]
To: elecraft@mailman.qth.net
Sent: Tuesday, June 13, 2006 7:56:08 AM
Subject: RE: [Elecraft] What Vertical Antenna Do I Need?
Hey Fred,
[SNIP}
Butternut is a tried true antenna. Hustler 4BTV or 5BTV is very
inexpensive and works just fine, thank
- Original Message
From: [EMAIL PROTECTED]
To: elecraft@mailman.qth.net
Sent: Tuesday, June 13, 2006 8:51:47 AM
Subject: RE: [Elecraft] What Vertical Antenna Do I Need?
I'm vertical bound at my home qth also as well as in a restricted neighborhood.
I installed a 29' home brew self supporting
I don't know anything about it other than what I read on the web
page, but the photos of HB9ABX's homebrew mobil antenna sure are intriguing:
http://www.datacomm.ch/hb9abx/antmob-e.htm
He has designs for a number of mag loop antennas as well, which
might fit your restrictions.
73 de chris
Keith, on the Force 12 verticals, which are true half wave (loaded)
verticals:
They provide a feedline support for about 18 inches or so out from the
center. After that, the coax can simply go to earth to the rig, or be
supported for a greater distance. Does not make that much difference in
For Fred's antenna need:
I would investigate the Force 12 vertical antennas. I have used several of
the Sigma 5 model, (20 to 10) on science projects and they are durable, easy
to set up and take down, and work with high efficiency, equal or better to,
a dipole of full size. They are bar
Stuart Rohre wrote:
They are coax
fed,with bead chokes on the coax so that bringing off the coax from the
center is not a problem.
This isn't true. The bead balun solves the problem of current flow on
the outside of the coax which occurs when the feedline length is such
that the outside of
If I remember correctly, the manual for the Sigma V says
to run the coax away from the antenna at ~90degrees as
much as possible to prevent coupling.
I had one of these in the past and was always amazed at
how well it performed for such a small antenna.
Greg-AB7R
On Tue, 13 Jun 2006
I know Fred, that the Sommer beam uses some cleaver loading techniques to
give multi band performance. I think he used the same loading on his
vertical element.
Stuart
K5KVH
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Elecraft mailing list
Post to: Elecraft@mailman.qth.net
You must be a
Yes, in theory any vertical half wave that is center fed should have the
feeder run at exactly a right angle, but in practice, Force 12 provides a
support arm for the coax, and that is sufficient to bring the coax off a
couple of feet where it then can hang either parallel or at an angle to the
Well Vic, details, details, I meant that the beads do help in the near
center area, as they are quite long, as good bead chokes are.
Yes, outside the bead area, you should bring the line off as orthogonal as
you can; but in practice, the angular droop of the coax has not caused one
bit of
Fred N3CSY asked:
I'm another limited space, restricted community
ham (for now). I've been considering different
types of verticals which might be best. I THINK,
I'm looking for an antenna which:
- vertical ?
- no radials
- no counterpoises
- no guy-wires
- 40 thru 10
- maybe 4
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