The MP-1 and MP-2 tape recorders were produced by the Moscow Searchlight Plant from 1954 and 1957, respectively.
The tape recorder '' MP-1 '' is a device for two-track recording and playback of sound, working in conjunction with a player and receiver with an input for connecting a pickup.
The prefix '' MP-1 '' provides recording from a pickup, a radio receiver, a broadcast network, a piezoelectric microphone, and playback of the recordings through a receiver or amplifier.
The quality of the media used ferromagnetic tape type "C".
The nominal speed of the sound carrier is 19.25 cm / s, provided that the player's disc has a speed of 78 revolutions per minute.
The nominal level of the output signal is 1.0 V. The band of recorded and reproduced frequencies is 100 ... 5000 Hz.
The recording time on one tape is about 20 minutes.
Own noise of the console is 50 ... 70 times less than the nominal output level.
The set-top box is powered by 127 or 220 V. The set-top box does not have a recording level indicator, which is why several test fragments had to be done before starting recording.
The plant produced about 60 thousand consoles.
Presumably in 1956, a batch of MP-1M tape recorders was released, there is no information on the model yet, there are only a few photos.
Perhaps this model is from another factory. The MP-2 tape recorder is designed for amateur recording and playback of phonograms on type I and II ferromagnetic tapes, respectively type C or CH.
The prefix provides recording from a microphone, pickup, broadcast line, radio, TV, as well as dubbing of vinyl records to magnetic tape using a single electric player.
Playback of these recordings is carried out through a radio having an adapter input.
The speed of the magnetic tape 19.5 cm / sec.
provided that the disc of the electric player has a speed of 78 rpm.
The band of recorded and reproduced frequencies is 70 ... 7000 Hz at an output level of 1 V.Two-track recording.
The recording direction on the tracks corresponds to the international standard, that is, if you look at the tape from the side of the ferro layer, then when the tape moves from right to left, the upper track is recorded.
The frequency response of the prefix MP-2 and the position of the universal head are adjusted by the factory according to the test magnetofilm.
The duration of the tape-filled coil on 2 tracks at a rated speed of about 20 minutes.
The level of the recorded signal is controlled by an optical luminescent indicator. The instruction manual for the "MP-1" attachment.
Description "MP-1" in Radio No. 9, 1954. Operating Instructions for "MP-2".
Video about the prefix "MP-2".
Materials S.N. Ermakova, S. Shtygi and S.V. Litvinov, Moscow.