The EZNEC+ model I did showed the same thing ... the two lower wires had
to be much longer than I expected in order to get even a moderate SWR.
The pattern looked awful even when I did so.
73,
Dave AB7E
On 12/8/2018 4:49 AM, Don Sanders wrote:
While in Ecuador I tried this skeleton discone. Did not work well.
Actually I had to extend the lower wires from formulas by about 30 %
to get a low <3 swr at design freq, 40 meters. I did not try adding more
wires.
I had several good antennas I made so I did not do further investigations.
Dr. Don W4BWS
On Fri, Dec 7, 2018 at 5:30 PM Charlie T <pin...@erols.com> wrote:
I wonder if anyone has ever tried, for want of a better name, a "Skeleton
Cone" which consists of a single horizontal wire connected to the coax
center conductor and two sloping wires at 45 degrees, in the same plane
connected to the coax shield. A true Discone antenna would have many
(typically eight each) horizontal and sloping elements. I'm guessing many
of us have used the VHF/UHF version for very wide band coverage, for
example 144, 220, 432 MHz and even higher. I know I have one up and it
performs as well as a regular single band ¼λ ground plane (unity gain)
on all three bands with low SWR. The ICOM version as well as a few others,
also have a loaded whip for 52 MHz mounted on the bushing that the
horizontal elements are screwed into.
I'm also guessing the formulas for a true Discone would work for a
"skeleton" style as well. I Since it is inherently a wide band design, the
actual lengths are probably not too critical. I've heard this type antenna
described, but I don't remember where or how well it supposedly worked. It
obviously requires two supports, high enough that the sloping wires ends
are off the ground by a bit.
73, Charlie k3ICH
______________________________________________________________
Elecraft mailing list
Home: http://mailman.qth.net/mailman/listinfo/elecraft
Help: http://mailman.qth.net/mmfaq.htm
Post: mailto:Elecraft@mailman.qth.net
This list hosted by: http://www.qsl.net
Please help support this email list: http://www.qsl.net/donate.html
Message delivered to w4b...@gmail.com
______________________________________________________________
Elecraft mailing list
Home: http://mailman.qth.net/mailman/listinfo/elecraft
Help: http://mailman.qth.net/mmfaq.htm
Post: mailto:Elecraft@mailman.qth.net
This list hosted by: http://www.qsl.net
Please help support this email list: http://www.qsl.net/donate.html
Message delivered to xda...@cis-broadband.com
______________________________________________________________
Elecraft mailing list
Home: http://mailman.qth.net/mailman/listinfo/elecraft
Help: http://mailman.qth.net/mmfaq.htm
Post: mailto:Elecraft@mailman.qth.net
This list hosted by: http://www.qsl.net
Please help support this email list: http://www.qsl.net/donate.html
Message delivered to arch...@mail-archive.com
