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Field telephones are telephones used for military communications. They can draw power from their own battery, from a telephone exchange (via a central battery known as CB), or from an external power source. Some need no battery, being sound-powered telephones . Telephone linesmen ford Lunga River during the Guadalcanal Campaign of World War II.
The TA-57 can be used for induction calls working with 2-wire lines in an OB (local battery) or a ZB (central battery) operation. It can be used to transmit voice messaging in ranges between 0.3 and 3.4 kHz, with a calling frequency of 15 to 45 Hz. Absolute signal level at output of transmission path with a 600Ω load ranges between -3 and +3 dBu.
Tank phone. A tank phone (also called a tank telephone, grunt phone, tank-infantry phone, TIP, infantry tank telephone, ITT, or infantry phone) is a telephone mounted on the exterior of armoured vehicles to facilitate communication between people outside of the vehicle and those inside, whilst avoiding the tank crew becoming exposed to enemy fire.
SCR radio sets. The U.S. Signal Corps used the term "sets" to denote specific groupings of individual components such as transmitters, receivers, power supplies, handsets, cases, and antennas. SCR radio sets ranged from the relatively small SCR-536 "handie talkie" to high-powered, truck-mounted mobile communications systems like the SCR-299 and ...
The SCR-694 "Radio set, Portable/Vehicular" consisted of the BC-1306 vacuum tube transmitter/receiver capable of AM and CW mode operation between 3.800 and 6.500 MHz . Weight — 19.5 pounds. Range — up to 15 miles on AM voice. Up to 30 miles reported on Morse code between moving vehicles. Optional accessories — hand crank generator with ...
The field telephone 50 is used by all communication troops of the Swiss Army for both point-to-point connections and landlines . For the first variant, two field telephones are connected with telephone wire. In the second version the phone is connected to lines specially reserved for the army. Such a linked phone is accessible from any telephone.
Military communications – or "comms" – are activities, equipment, techniques, and tactics used by the military in some of the most hostile areas of the earth and in challenging environments such as battlefields, on land (compare radio in a box ), underwater and also in air. Military comms include command, control and communications and ...
TM 9-2800 Military vehicles dated October 1947. TM 11-227 Signal Communication Directory. dated 10 April 1944. TM 11-364 K-44-B Truck and earth borer equipment HD. TM 11-487 Electrical Communication systems Equipment. dated 2 October 1944. TM 11-487-C1 military standardization handbook dated 1965.