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Universal Audio, Inc. was founded alongside the United Recording Corporation by Bill Putnam Sr. in 1958. Putnam’s intention was for Universal Audio to serve as United’s manufacturing arm, with the company initially operating out of the United Recording premises at 6050 Sunset Boulevard in Hollywood, California.
The size of most Robbins Apollo medallions falls roughly between a current US quarter (24.3 mm (0.96 in)) and a Kennedy half dollar (30.6 mm (1.20 in)). The medallions were struck in sterling silver two to three months prior to the scheduled mission, though it is unclear whether serial numbers were added pre or post-flight. [31]
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Late version Quad "ESL-57" loudspeaker with black grilles and rosewood end caps. The Quad Electrostatic Loudspeaker (ESL) is the world's first production full-range electrostatic loudspeaker, launched in 1957 by Quad Electroacoustics, then known as the Acoustical Manufacturing Co. Ltd. [1] The speaker is shaped somewhat like a home electric radiator curved slightly on the vertical axis.
RCS quad containing four R-4D thrusters, as used on the Apollo Service Module. Four clusters of four reaction control system (RCS) thrusters (known as "quads") were installed around the upper section of the SM every 90°. The sixteen-thruster arrangement provided rotation and translation control in all three spacecraft axes.
The LA-2A was invented by James F. Lawrence II, founder of the Teletronix Engineering Company in Pasadena, California in the early 1960s. The LA-2A had evolved from Lawrence's first leveling amplifier, the LA-1, which was favored by Gene Autry, and its successor, the LA-2, which had been adopted by CBS and RCA.
EaglePicher's silver zinc batteries provided electrical power for the life support and guidance control systems after a fuel cell failed on the Apollo 13 landing, thus helping the astronauts return safely back to Earth. [9] EaglePicher started development work on thermal battery technology back in 1949.
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