[Elecraft] OT Wullenweber Array

[Karl Larsen]

    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
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