[Milsurplus] BC-650-A

[Mike Morrow]

>...I came across a 3x5" plastic circuit diagram for the Army radio
>BC-650-A. They appear to be two -2 tube TRF receivers... 
>
>What were these used for? Google didn't seem to turn up very much. 

You can find a brief description of the BC-650 at:

http://pages.cthome.net/fwc/BC-EQP.HTM

It's part of the test equipment (IE-16) for the early Mark IIG SCR-535 IFF set.  I'd suppose that it serves a similar function as the common BC-1066 "radio receiver" does for the later Mark II and IIIG IFF (SCR-595, -695).

I've never actually seen any components of the SCR-535 IFF.  They appear to be much more rare than components of the SCR-515, -595, and -695 IFF sets.

Mike / KK5F