Field Telephone Sets

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TAP-77 field telephone set is designed for establishing a telephone connection through telephone channels, radio/radiorelay and wire communication lines. The calling of the correspondent is made by means of magneto and the magneto call receiver is electronic one.

  • connection to "Local Battery" telephone sets and exchanges

  • connection to "Central Battery" telephone exchanges;

  • operation with automatic exchanges by means of a separate dialing attachment;

  • closing the subscriber line stub when the telephone is radio remote controlled;

  • connection to the communication lines as a control post.

TAP-77 field telephone set is designed to provide reliable operation in different climatic conditions and it is hermetically sealed, impact and vibration resistant.

Covering attention at 800 Hz, dB >40
Local effect attenuation(300-3400Hz), dB >20
Magnetic output power, W >2
Calling singal acoustic level, dB >80
Transmission ratio(1000Hz), Pa/V 0,6-1,1
Frequency response of the transmission ratio
     in 300 - 2000 Hz band, dB/oct
     in 1500 - 3400 Hz band, dB/oct

from 4 to  6(+/-2)
Receiver ratio mean value, Pa/V 3
Amplitude response in transmission mode compared to the zero level, dBm >6
Non-linear distortions coefficient of transmission at zero output level, % <5
Internal noise level, dB >50
Power supply, V 9
Volume, dm3 3,5
Weight, kg <3
Operating temperature, oC - 50/ +50

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