[Boatanchors] National R-1230 countermeasures receiver

[HL]

Wanted: manual, documentation, information for National Radio Company’s 1963 countermeasures receiver, Models R-1230 or R-1125. I am stymied by its ten-pin power connector and need pin IDs for 6.3VAC, B+, Bias, etc. Would love to get this complex beast operating on AM and have an outboard IF/detector/audio module that is compatible! Any info will be appreciated.  Email: kk6hy at arrl.net  Holiday greetings, Hal KK6HY