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