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Radiola network lamp "Serenade" since 1963 was produced by the Vladivostok plant "Radiopribor". The desktop radio of the 4th class "Serenade" is a superheterodyne radio receiver operating in the DV, SV bands, combined with the EPU-5 electric-playing device. In 1965, 3-EPU-28 was installed, still later 3-EPU-28M. Radiol is assembled on three radio tubes 6I1P (2 pcs.) And 6P14P as well as 5 D2D diodes (1 pc.) And D7G (4 pcs.). The sensitivity of the radiograms in both ranges from the antenna input is not less than 300 µV. The adjacent channel selectivity is 20 dB. 24 dB mirror channel selectivity. Rated output power 0.5, maximum 1 watt. The range of frequencies reproduced by the loudspeaker 1GD-10, later 1GD-18, still later 1GD-28 is 200 ... 3000 Hz during radio reception and 200 ... 6300 during EPU operation. Radiol consumes 50 W when playing records, 35 W when receiving. The dimensions of the model are 420х275х240 mm, weight is 10 kg. Radio "Serenade" was produced until 1973.