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Stereo radio in stereo phones "Echo-601-stereo" since the beginning of 1984 produced Sarapulsky radio plant. Radio "Echo-601-stereo" built-in stereo phones is designed to receive stereo and mono VHF-FM radio stations in the range of 65.8 ... 73 MHz. Radio reception is made on a removable small whip antenna. There is a smooth tuning, automatic frequency control, separate volume control, a power switch, phone jacks for external program sources, an external power amplifier, a tape recorder for recording radio programs. The radio "Echo-601" is powered by a Kron-VTs battery with a voltage of 9 V. Main technical characteristics: The real sensitivity is 12 µV. Maximum output power 2x2 mW. Rated power stereo phones 1 mW. The nominal frequency range at the linear output 50 ... 12500 Hz. The frequency range of stereo phones is 20 ... 20000 Hz. The output voltage for connecting a tape recorder to record 20 mV. Current consumption 10 mA. Dimensions of stereo phones 220x185x100 mm. Mass 700 gr.