Nick,
Usually, one of the services owns the production and relationship with the customer for a program. For example, the Navy owned the Sidewinder missile, and the Air Force had to procure them through the Navy.
I believe that the R-390/URR was owned by the ARMY. The contract number tells only who was paying for that radio.
This approach streamlines the procurement process, but can create supply issues for the non owner of the program, as the owner often prioritizes his/her own service needs.
The F-4 program was originally Navy, but then it was split with the Air Force. The Marines owned the RF-4 programs.
Best, Francesco K5URG
Sent from my iPad
Most all the R-390A contracts were numbers like 42428-PC-59, clearly an army Signal Corps contract. But there are some like DAAB05-68-C-0040 - is that also Army?
and what about
FR-36-039-N-6-00189(E)???
AFAIK, the only Navy contract was for the 5 Fowler units under
N00024-84-C-202 plus an EAC spares contract N00126-70-C-0359
Otherwise all the Navy ones were procured by the Signal Corps?
Nick England K4NYW
www.navy-radio.com