6625-00-229-1053 (SC-D-44623)
NSN 6625-00-229-1053 (NIIN 00-229-1053) is a telephone test set in Federal Supply Class 6625, Electrical And Electronic Properties Measuring And Testing Instruments — a test set primarily designed for use in making examinations of telephone lines, switchboards, and/or associated equipments. Manufacturer part number SC-D-44623 (Us Army Communications & Electronics, CAGE 80063); also referenced as SC-D-44627 (Us Army Communications & Electronics); TS-420/U (Joint Electronics Type Designation).
Key specs: 4.500 V minimum second operating power rqmt DC voltage; 22.500 V maximum first operating power rqmt DC voltage; full characteristics table below. NIIN assigned January 1963; DEMIL B (USML, demil required); export Schedule B 9030.90.8030; ships at 14 lb / 0.978 cu ft.