Professional reel-to-reel tape recorder "MDS-1".
Tape recorders and radio tape recorders.The professional reel-to-reel tape recorder "MDS-1" has been produced presumably since 1948. It is designed for recording and reproducing speech information and with the possibility of reprinting it on a typewriter. The tape recorder consists of a cabinet containing a running gear (LPM), recording and playback amplifiers and a rectifier, a special typist's table and a remote control panel with a microphone. The remote control system (RC) allows the cabinet to be installed at a distance of 10 meters from the typist's desk, and the remote control with a microphone at a distance of 20 meters. The system of the running mechanism and control allows the typist to stop the movement of the tape at any time and start it again, and if the recording is illegible, she can stop the apparatus, while the tape will automatically rewind and the typist will listen to the desired recording point again. At the moment the film breaks, the machine stops automatically. The tape recorder is designed to operate from a dynamic microphone, a receiver with a voltage of 1.5 ... 5 V at the output, and from a telephone line. The quality indicators of the tape recorder on the "C" type film (recording-playback path): uneven frequency response in the range of 200 ... 4000 Hz - 13 dB. Noise level relative to the level at 100% modulation of the sound carrier -40 dB; harmonic coefficient at a frequency of 400 Hz - 5%; film speed is 26 cm / sec; continuous sounding time of one full roll (1000 meters) 60 minutes. The tape recorder is powered from a 110/220 V AC network through a special autotransformer installed in the rectifier.