5950-00-230-0953 (4)
NSN 5950-00-230-0953 (NIIN 00-230-0953) is a radio frequency transformer in Federal Supply Class 5950, Coils And Transformers — an item having either a single tapped winding (autotransformer type). Manufacturer part number 4; also referenced as 4 663 (Naval Ship Systems Command); K901660-501 (RCA Corp Distributor And Special).
Key specs: 21 to 26 kHz single component frequency; full characteristics table below. NIIN assigned January 1963; DEMIL A (none required); export Schedule B 8548.90.0100.