Transistor network electrophones "Akkord" and "Akkord-201" since 1969 and since 1973 have been produced by the Riga Radio Plant named after Popov in cooperation with the PTO "Radiotekhnika" and the Chelyabinsk Radio Plant.
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Electrophone 2nd class "Accord" (IIEF-69) consists of EPU "II-EPU-40" with three speeds of rotation of the disk 78, 45, 33 rpm, a transistor amplifier and a remote speaker system, in which one
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broadband loudspeaker 4GD-28.
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The electrophone is designed for high quality reproduction of conventional and LP records of all formats.
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The microphone can be used with a radio and tape recorder with low output power or a narrow-band speaker system to improve the quality as well as the sound volume.
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The electrophone allows you to listen to the broadcasts of the broadcasting network, and in combination with a reel-to-reel or cassette tape recorder, to record from a disc onto a magnetic tape.
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The pickup of a tubular design has a rotary monophonic piezoceramic head of the GZK-661 type, with two corundum needles for LPs or ordinary records.
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Pickup sensitivity - 50..100 mV per cm / sec, the lower limit of reproducible frequencies is 45 Hz, the upper one is 14000 Hz.
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The microphone has volume and tone controls for bass and treble.
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The nominal output power of the microphone is 1.5 W, at THD ~ 3%.
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The operating frequency band for sound pressure is 80 ... 12000 Hz with unevenness at the edges of the range of 14 dB.
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AC power supply.
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The power consumed from the network during the operation of the EPU is 25 W, the amplifier is 10 W.
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The dimensions of the speaker are 363x270x122 mm, the dimensions of the microphone are 392x315x158 mm.
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Kit weight 9 kg.
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PTO "Radiotekhnika" and the Chelyabinsk Radio Plant since 1973 have been producing a modernized electrophone "Accord-201" (type II-EF-1M) featuring a new EPU, a loudspeaker in the acoustic system and minor changes in its external design.
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