[GreenKeys] Question about URA-8 A B

[Nick England]

The manuals say-
AN/URA-8A manual 91278 5 Dec 1949 - ( no blowers )
contract NObsr 42027 8 Oct 1947 Hoffman

AN/URA-8B manual 91490 3 July 1951 - ( blowers )
contract NObsr 52069 13 Feb 1951 Hoffman
contract NObsr 64205 ?? National

FWIW - There are extra holes in the CV-89A (blown) modules to let some of 
that cool air in, so that might have been difficult to accomplish in a Field 
Change.

Summary -
AN/URA-8A (no blowers)
two CV-89/URA-8A converters plus one CM-22/URA-8A Comparator
manual NAVSHIPS 91278

AN/URA-8B (with blowers)
two CV-89A/URA-8A converters plus one CM-22A/URA-8A Comparator
manual NAVSHIPS 91490

Note: AN/URA-8 is a different design, manuf. by RCA with different
mechanical/electrical layout but functionally interchangeable
two CV-60/URR converters plus one CM-14/URR Comparator
manual NAVSHIPS 91339

cheers,
Nick
www.virhistory.com/navy