Portable transistor radio receiver of the 3rd class `` Mriya-301 ''.
Portable radio receivers and radios on p / p.DomesticSince 1971, the Mriya-301 portable transistor radio receiver of the 3rd class has been produced by the Dnepropetrovsk Radio Plant. '' Mriya-301 '' - a radio tape recorder with 9 transistors and 2 diodes with an EPU-6-9V electric playing device. Ranges of received waves: DV, SV, KV-1 - 31 ... 25 m and KV-2 - 75 ... 41 m. In the HF range, reception is carried out on a whip (telescopic) antenna. Maximum sensitivity at an output power of 50 mW: at LW 500 μV / m, SV 200 μV / m, KV 30 μV. Real sensitivity at LW 1.5 mV / m, SV 0.8 mV / m and KV 100 μV. Selectivity on the adjacent channel: on DV, SV not less than 40 dB. Attenuation of the mirror channel at DV 30, SV 26, KV 12 dB. AGC action: When the input signal changes by 26dB, the output voltage changes by 6dB. The band of reproducible sound frequencies is 300 ... 3500 Hz. The nominal output power, with the THD of the entire channel of the receiver, no more than 5% - 250 mW. The average sound pressure in the band of reproducible sound frequencies is 0.3 Pa. Power supply: six elements of type 373. Supply voltage 9 V. The current consumed by the receiver in the absence of a signal is 15 mA. The radio remains operational when the supply voltage drops to 4 V. The operating time of the receiver at an average volume from one set of type 373 elements: not less than 100 hours. The playing device has 3 disc rotation speeds: 33; 45 and 78 rpm. The current consumed by the electric motor is about 85 mA. The dimensions of the radio are 288x117x90 mm. Weight with batteries 3 kg.
