Network tube radio receiver '' Riga T-755 ''.
Tube radios.DomesticSince October 1947, the "Riga T-755" type network radio receiver has been produced by the "Radiotekhnika" Riga plant. The name "Riga T-755" is deciphered as follows: T network type, 7 year of development, 5 the number of high-frequency circuits, 5 the number of lamps. The radio operates on standard long, medium and short wave bands. The sensitivity from the antenna input of the antenna is about 180 µV on all bands. Intermediate frequency 468 kHz. Selectivity on the adjacent channel 35 ... 40 dB, mirror, on DV, CB - 30 dB, on HF - 12 dB. The nominal output power of the amplifier is 2 W. The range of reproducible sound frequencies is not narrower - 200 ... 4000 Hz. Power consumption from the network is 50 W. The first series of radio receivers, released before 1951, had extended ranges: DV - 2069 ... 750 m, SV - 577 ... 185.5 m, HF - 71.5 ... 21.5 m. Sensitivity and selectivity to the neighboring channel, as well as the output power in this series were also significantly higher: 100 μV / 50 dB / 3 W, respectively. The model parameters were adjusted to the new GOST for class 4 receivers. The 5TS4S kenotron in the power supply unit was replaced in 1951 with the more economical 6Ts5S. Receiver dimensions 400х310х205 mm, weight 10.6 kg.
