TM 11-246B Radio Set SCR-503-B (Direction Finding) Technical Manual with Original March 1944 Addenda

Original World War II War Department Technical Manual TM 11-246B covering the SCR-503-B Direction Finding Radio Set, dated March 4, 1944. The SCR-503-B was a mobile radio direction-finding system used by Signal Corps units to locate radio transmissions and assist with communications intelligence, navigation, and tactical operations. This manual contains operating procedures, technical data, maintenance information, and equipment specifications. Includes the original March 28, 1944 Addenda Sheet with wartime corrections and technical updates. Features period library markings from the Chicago Signal Corps Inspection Library, adding historical provenance. A highly desirable Signal Corps manual relating to radio direction-finding technology during WWII.

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