Well, I think we're heading in the right direction, but the one in the
Wikipedia picture just has two wires between the end spreaders, and the
one I saw had five. Also, the one in the picture seems to have something
in the middle of it, and the one I saw didn't.
Another thing, the antenna I saw seemed to be part of one of the
(multi-band) hex-beam antennas. It didn't have an obvious feed-point; it
just formed one of the hex sides of the (single band) hex-beam. The
other multi-band hex-beam band antennas didn't have this antenna attached.
Here's another illustration. It could have appeared in the legs labeled
1 or 2, or even could have been in the reflector legs, I guess, but that
seems improvable. Picture at
https://www.dropbox.com/s/1xk0rbc6a79g2zb/IMG_20220523_150816134.jpg?dl=0
-Kevin
On 5/23/22 14:55, Al Kozakiewicz wrote:
> https://en.wikipedia.org/wiki/T2FD_antenna ?
>
> -----Original Message-----
> From: TowerTalk <towertalk-bounces@contesting.com> On Behalf Of Kevin
> Zembower via TowerTalk
> Sent: Monday, May 23, 2022 2:54 PM
> To: towertalk@contesting.com
> Subject: [TowerTalk] Fwd: What kind of antenna is this?
>
> There's a drawing at
>
> https://www.dropbox.com/s/8omfop6trejx211/IMG_20220523_144427650_BURST000_COVER.jpg?dl=0
>
> despite my very limited artistic talent.
>
> -Kevin
> KC3KZ
>
>
>
> -------- Forwarded Message --------
> Subject: What kind of antenna is this?
> Date: Mon, 23 May 2022 12:22:01 -0400
> From: Kevin Zembower <kevin@zembower.org>
> To: towertalk@contesting.com
>
> Hello, all,
>
> At Hamvention, I saw a couple of antennas that seemed to be part of a
> multi-band hex-beam. They consisted of two rings about 2 inches in diameter,
> separated by about 3 feet, with 5 parallel wires between them.
> On closer inspection, it seemed like a single wire double back and forth
> between the rings. I've also seen a similar arrangement on Naval ships,
> albeit much larger. They're mounted horizontally and seem to be fed from
> either end. The literature on the sales table might have referred to this as
> a 'Short 40.' The table was busy, and I didn't get to talk with the sales
> representative about it.
>
> Can anyone tell me the type or name of this antenna? Can it be modeled with
> NEC? What are it's characteristics, advantages and disadvantages?
>
> Thanks so much. Looking forward to learning more.
>
> -Kevin
> KC3KZ
>
> _______________________________________________
>
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