"Sal M. Onella" wrote in message
news

"christofire" wrote in message
...

snip


Such a design also appears as a self-supporting HF receive antenna the
Navy
mounted on the forward gun mount. I
struggled to find a picture of a ship with one showing but no luck.
The
elements were about five to seven feet long and arranged as the OP
describes.


USS Missouri http://www.kh6bb.org/photos2.html

Chris



Chris, that's the discone/cage, a transmit antenna with two individual
feedlines from the Radio Room. Some people call it the discage, as on the
website, but I never did.

The cage portion radiates 4 - 12 MHz and the discone portion radiates
10-30.
IIRC, it stands more than 20 feet high.

The antenna I'm trying to remember was receive only and was less than 6
feet
high. It had a shape that sort of resembled a squat wire basket.

Sal


Sal,

There's a directory of antennas used at one time or another by the US Navy
at http://www.combatindex.com/hardware/...nsor_main.html. Could it
be the AS-2231? The 'discage' appears to be the AS-2802. Also, a
contributor to this group, Richard Clark, has some photos at
http://home.comcast.net/~kb7qhc/antennas/navy/.

I was aware that the discage in at least one of its incarnations had two
separate feed lines, and the combination of two antennas in one 'package'
gives rise to its particular shape. However, it has always intrigued me
that a single element of similar shape has been used since the early 50s by
the British Navy in the AJE/UK-SRA-102:
http://middle-watch.com/communications.htm and
http://rnmuseumradarandcommunication...org.uk/AJE.pdf. This could be a
coincidence or it could be that F. A. Kitchen, the designer of the AJE, had
been influenced by having previously seen a discage (his paper about
development of the AJE doesn't really explain where the shape comes from).
So I wonder when the AS-2802 'discage' came into use?

Chris