Sorry, this page is not translated yet. Automatic translation used.
Radio "R-721" (Trap-SV) has been mass-produced since 1969. The receiver is designed for round-the-clock hearing of telephone and telegraph signals in the range 50 ... 2000 kHz divided into six sub-bands, as well as the reception of special types of transmission in the presence of intermediate and terminal devices. Telegraph sensitivity 0.8 µV, telephone 8 µV. The bandwidth is narrow, smoothly adjustable within 15 ... 3000 Hz and wide, fixed within 5000 and 8000 Hz. Dimensions of the receiver 475h320h425mm. Its weight is 38 kg.