[Milsurplus] Designations

[Nick England]

Actually there is no such thing as an R-390A. There is only an R-390A/URR.

The AN nomenclature system covers systems such as AN/FRR-42 and components
such as R-390A/URR.
For example:
R-xxx/URR-35 is used only for AN/URR-35 application
R-xxx/URR is used for utility, radio, receiving applications
R-xxx/UR is used for utility, radio applications
R-xxx/U is used for utility applications

See section 3 on this page for a full listing
http://www.designation-systems.net/usmilav/electronics.html

Cheers
Nick

On Fri, Jun 7, 2019 at 6:52 PM Hole in the Head Press <sestokes at sonic.net>
wrote:

> Is there a listing somewhere that identifies such things as....
>
> /AP  /U  /GR  /URR  /FG  /FR  /G  /PT  /UP
>
> For example what is the difference between an R-390A  and an R-390A/URR?
>
> Thanks.
>
> --
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-- 
Nick England K4NYW
www.navy-radio.com
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