Sound Recorder, Field Artillery (836) Enlisted Personnel

Operates and maintains sound recording oscillograph equipment used in field artillery sound ranging.
Connects oscillograph by wire to microphone and telegraph installations at forward observation posts. Checks functioning of microphones by observing recording dials on oscillograph. Establishes telephone communications with sound ranging observers, relaying necessary instructions. Accomplishes sound recording by means of coordinated action of a special relay unit and oscillograph camera action. Prepares or directs preparation of chemical solution to wash sound film which is developed automatically. Supplies film to readers who determine time intervals. Maintains set by repairing and replacing parts, using electrician's hand tools.
Must have knowledge of electricity including relays, electrical circuits, filters, audio frequency amplification, electrical damping, and thermionic tubes.