Stationary transistor radio "Efir-M".
Radiols and receivers p / p stationary.DomesticThe stationary transistor radio "Efir-M" has been produced at the Chelyabinsk Radio Plant since the 1st quarter of 1964. "Efir-M" is a desktop radio tape recorder on transistors with combined power supply from the electrical network or 6 A-373 elements with a total voltage of 9 volts. Radiola is an upgrade of the Efir radio. The radio receiver is assembled on 9 transistors and 5 diodes according to a superheterodyne circuit with DV, SV, and 3 HF sub-bands, of which 2 are stretched. The sensitivity is about 30 μV. Adjacent channel selectivity 34 dB. The radio has an AGC system. Rated output power 500 mW. The radiola reproduces the frequency band - 100 ... 4000 Hz when receiving and - 100 ... 10000 Hz when listening to a record. Power consumption from the network when receiving 3.5 watts. A set of batteries lasts for 200 hours of operation. The radiola plays records when the supply voltage drops to 6, and on reception to 4 volts. Dimensions of the model 500x280x330 mm, weight 15 kg. In 1966 the radio was modernized. The appearance and name remained the same, but the changes mainly affected the electrical circuit. Improved selectivity for image channels on HF, increased sensitivity, and a more efficient relay AGC is used in the IF amplifier block.
