On Thu, 07 Apr 2005 15:19:29 GMT, "RadioGuy"
wrote:

Well, our Telefunken curtain arrays have a typical gain of 20-23 dB.

TeleSource has just installed two TCI (Technology for Communications
International) 611VS curtains at 270 and 305 degrees for the low band
(6-12 MHz) here on Tinian. 3db azimuthal beamwidth is variable between
20-36 degrees, and they are vertically slewable in 4x4 and 4x6 mode.
Gain is between 16.6 to 24.1 dBi, and tower height is about 470 feet.

I would daresay if a 3-5 degree beamwidth had ever been made, it is
probably experimental. The physical size makes it prohibitively
expensive as well as mechanically improbable.

Al in CNMI
IBB Station engineer (contract)

I wonder if shortwave broadcast antennas have been used for
signals/communications intelligence?

RG


Back in the old days of the ASA, we had a General Dynamics FLR-9
antenna at most field stations. It was about 2km in diameter with
vertical antennas for every degree.

In germany, late at night, we would roll the old R-390A up on
mediumwave and listen to ball games from New York.

You can see a picture of one on the home page at www.usafsa.org which
is Field Station Augsburg's home page.

ASA Lives!

Al in CNMI

----== Posted via Newsfeeds.Com - Unlimited-Uncensored-Secure Usenet News==----
http://www.newsfeeds.com The #1 Newsgroup Service in the World! 120,000+ Newsgroups
----= East and West-Coast Server Farms - Total Privacy via Encryption =----