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The lamp network "Yunost" and "Yunost-301", respectively, from 1967 and 1970 produced the Leningrad Association "Sputnik" and the Yaroslavl Radio Plant. The "Yunost" electric phone is designed for playing records of any format at speeds of 33, 45 and 78 rpm. Electrophone used EPU - III-EPU-28, which was later replaced by III-EPU-28M (38M). The electric circuit of the phone is assembled on two 6N2P and 6P14P radio tubes. The speaker used 1GD-28 loudspeaker. Since 1970, the Yunost-301 flashlight has replaced the Yunost flashlight, practically repeating it. The electrical circuit was modified, two loudspeakers were installed, the color range was expanded. The '' Yunost-301 '' electric phone is also assembled on 6N2P and 6P14P lamps. The nominal output power of the amplifier is 1 W on two 1GD-28 loudspeakers, in later releases 1GD-40 (2GD-40.) The range of reproduced sound frequencies is 150 ... 7000 Hz. The microphone is assembled in a suitcase type case and is powered from the mains, consuming 50 watts of power. Model dimensions - 390Ñ…285Ñ…160 mm, weight 7 kg. Electrophone "Youth-301" was produced before 1980.