Kosmonavt 1964
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The transistor radio "Cosmonaut" from I quarter of 1964 produced the Minsk Radio Plant. It is made in a rather unusual design for models of the mid-60s. The feature of the receiver is low-voltage power, just 4.5 volts from the three elements of the 373, and the receiver retains all its parameters, except for the output power when it is reduced to 2.5 volts. The radio receiver is assembled on 8 transistors and operates in the ranges of LW, ST. It has a sensitivity on the DV, NE, respectively, 1.2 mV / m, 0.8 mV / m. 26 dB selectivity. The rated output power of the ULF on a 0.5 GD-12 loudspeaker is 150 mW, the maximum 250 mW. The range of reproducible sound frequencies is 300 ... 3500 Hz. Quiescent current of about 10 mA. The receiver dimensions are 224x168x68 mm, weight 1.7 kg. The radio receiver was created on the basis of the Mountaineer receiver circuit with the addition of an IF cascade and recalculation of the ratings of parts for power supply of 4.5 V. In those years, the appearance of such a radio receiver with the possibility of its use in stationary and portable versions was an achievement.
Information from collection of Valery Khartchenko