Hi Ron thanks for the re-print of the manual. It is a lot more than
just an antenna. It has a lot of electronics including computers of that
era to measure the direction the signal is coming from. I bet the system
cost a whole lot of money back then.
And when you see that there is a building inside the third ring you
get a feel for how big it is.
We read a whole lot of other counties mail back there when all long
range transmissions were on HF. During the Korean Police Action I was in
the Navy and the Admiral aboard got his secret info by CW from Pearl
Harbor. Of course anyone with this kind of antenna can intercept the
message from the other side. As I recall the code we used was good for
30 days. I think NSA found that.
72 73 Karl K5DI
Ron D'Eau Claire wrote:
While it's an impressive array, it's really just a directive receiving
antenna: a bunch of vertical monopoles more descriptively called a
"circularly disposed antenna array" or CDAA.
You can read the original US military technical manual here
http://kahuna.sdsu.edu/~mechtron/PremRxPage/ref/wullenweber.pdf
Ron AC7AC
_______________________________________________
Elecraft mailing list
Post to: Elecraft@mailman.qth.net
You must be a subscriber to post to the list.
Subscriber Info (Addr. Change, sub, unsub etc.):
http://mailman.qth.net/mailman/listinfo/elecraft
Help: http://mailman.qth.net/subscribers.htm
Elecraft web page: http://www.elecraft.com
