placed on the turntable. An index scale for timing the recorder and re- producer arms is mounted on the front cover. The index scale is graduated in 14-minute intervals up to 15 minutes. (3) The motorboard (fig. 20) mounts a turntable, a motor, sealed-in gears, a recorder arm, a reproducer arm, a reproducer-head latch, three micro- switches, and an optical system that focuses light from the index lamp onto the index scale. The turntable is made of heavy zinc casting, upon which a bakelite shell is placed. An extra protective disk rests on the shell to prevent damage to the styluses. (4) The reproducer amplifier card (fig. 20) mounts the tubes and circuit ele- ments that are used for amplifying signals from the reproducer heads mounted on units A and B. The card connects to a receptacle on the chassis. The output stage of the amplifier is mounted on the chassis.
DesignationTM 11-5064
EditionSep 1954
StatusSuperseded
Pages88
FunctionComms Signal
CollectionHistoric
Public domain (U.S. Government work)