[R-390] "Classified" R-390A Receivers - Update

[Jeff Adams]

There is a picture of the classified document and declassification 
letter on my website:

http://www.jeffreyladams.com/class.html

73, Jeff

Jeffrey L. Adams  KG4RZM  Physicist at cox.net

http://www.jeffreyladams.com

Mentor of the R390/R390A CD Archive

Motorola   R390A/URR 1956 14-PH-56    Serial 1409 w/ CY979
Collins    R390A/URR 1952 14214-PH-51 Serial 979 w/ CY979
Collins    R392/URR  1951 3075-PH-51  Serial 252 w/ T195 transmitter
EAC        R390A/URR 1960 23137-PC-60
Hammarlund SP-600-JX-26 1953          Serial 13432
Hammarlund SP-600-JX-17 Diversity     Serial 12384







At 02:14 PM 6/5/2010, Al Tirevold wrote:
>In my research, I have come across exactly one reference that is classified -
>"Restricted" - and that is The Final Engineering Report on Radio Receivers
>R-389( )/URR and R-390( )/URR from 1953-Sep-15.  I suspect that that
>classification is an internal Collins radio item, not an official government
>classification.
>
>The document is at http://www.r-390a.net/faq-eng-r3.pdf
>
>The radio was frequently used within a secure 'classified' environment.  The
>uses to which the radio was put and the frequencies that were used were often
>classified.
>
>I have found no evidence that the radio was itself, ever 'classified'.
>
>Al Tirevold, WA0HQQ
>www.r-390a.net
>..
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