 TA-57 | |
| Main technologies or sub-processes | Field telephone |
|---|---|
| Year of invention | 1957 |
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. [1]
| TA-57 | |
| Main technologies or sub-processes | Field telephone |
|---|---|
| Year of invention | 1957 |
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. [1]
The first model of the TA-57 rolled out in 1957 for usage by the Soviet Armed Forces. [2]
As of 2022, the TA-57 was reported to be in use by Russian forces in the Russo-Ukrainian War. [1]
It has been documented in human rights reports as a torture device during the conflict, with euphemisms utilizing the TA-57 as a "phone call to Putin" or "call to Lenin". [3] [4]
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. [5] [6] [7]
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. [5]
The enclosing and body is made of Bakelite and its dimensions measure 22.2 x 16.5 x 7.9 cm, and weighs 2.8 kg. [5] [2]
There are multiple cables that are used, which can establish the range of the phone: [5] [7]
With a reception amplifier, the signal range of the phone can increase by 30-50%. [5] [7]
It is intended for operation ranging from -40 °C to 50 °C, and a max humidity of 98% at 25 °C. [8]
A modernized variant of it is known as a TA-57U. [8]
Soviet Union [2] [10] 
Iraq - one specimen in the Imperial War Museum was acquired during Operation Granby. [11] 
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