Radio receiver for the Navy `` R-677 '' (Whirlwind).
Receiving and transmitting radio equipment.The radio receiver for the Navy "R-677" (Whirlwind) has been produced since 1959 by the Petropavlovsk P / I P6641. Designed for pezpoiskovogo entry into communication and reception of telephone, telegraph and single-sideband signals. Receiving frequency range: 100 ... 1500 KHz, divided into 4 sub-bands. An SDV converter unit was produced for the receiver, which allows receiving frequencies from 3 to 110 KHz with a breakdown into 6 subbands and an IV-M unit (its purpose has not been established). Receiver sensitivity when receiving telephone signals 10 µV, telegraph 2 µV. Superheterodyne with one conversion. Receiver weight (5 blocks) 100 kg. The main photo shows a complete set of "R-677" radio receiver with 2 additional blocks.
