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TA-57

The TA-57 is a Soviet-era field telephone. It is a completely analog battery-powered wired system that is highly resistant to electronic interception and jamming.

History
The first model of the TA-57 rolled out in 1957 for usage by the Soviet Armed Forces. As of 2022, the TA-57 was reported to be in use by Russian forces in the Russo-Ukrainian War. It was also used to torture a suspect of the Crocus City Hall attack. == Description ==
Description
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. It also a has a deployment time of 2 minutes. Power is primarily drawn from a 10V lead–acid battery GB-U-1.3 (ГБ-10-У-1.3) with a capacity of 1.3 Ah, alternatively a 9V block battery can be utilized. In OB battery operation, a hand cranked magneto can be used to generate ringing. A modernized variant of it is known as a TA-57U. == Users ==
Users
Ukraine Former users Soviet UnionIraq – one specimen in the Imperial War Museum was acquired during Operation Granby. == References ==
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