Apollo Command Module Unified S-Band Omni Directional Antenna element manufactured by Amecom Div. Litton Systems, Inc., measuring approximately 4″ tall and 3″ in diameter, labeled “Antenna, S-Band Omni, NAA/S8ID Control Number, ME481-0048-0001, Contract No. NAS9-150, Mfg. Ser. No. 10037PRO1016, Mfg. Part No. 4422S Date 7-20-66.” In fine condition, with some soiling and tarnishing to the metal. One of four omni directional antennas integrated into the exterior of the Apollo Command module. The right-hand polarized helical low gain omni-directional antennas supplemented the single Service Module high gain S-Band antenna array as part of the spacecraft’s telecommunications system. Each was flush mounted at 90-degree increments around the lower perimeter of the Command Module and transmitted and received uplink/downlink voice, telemetry and data from the Command Module to the Manned Space Flight Center as well as between the Command Module and the Lunar Module.
Terms and abbreviations used in our descriptions.