P-504N (NU,NZ) 1990
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Special wire recorder "P-504N" (NU, NC) was produced presumably since 1990. The recorder is intended to play information from wire recording media taken from P-503B onboard (airplane) recorders (BS, BZ) and MS-61 (B), voice recording in continuous mode or autorun mode as well as time code signals. P-504NU, P-504NZ tape recorders provide remote activation of recording modes and rollback-playback. P-504NZ tape recorder with low-impedance inputs and outputs. Installed on avtospetstehnika, mobile or stationary points of contact, on the sea light speed boats. The tape recorder replaces the tape recorders "MN-61". Duration of continuous recording is 9 hours. Irregularity of the frequency response in the range of 300 ... 3400 Hz is not more than 10 dB. Power supply from AC mains 220 V, 50 Hz and 115 V, 400 Hz. Power consumption 75 VA. Speeds: the speed of 1 - 100 mm / s, the speed of 2 - 145 ... 195 mm / s. Knock factor of 7%. Rewind time 40 min. Possible movement of the media in the forward and reverse direction during playback. Dimensions of the device 338x240x220 mm. The remote control is 120x100x155 mm. Photos of the tape recorder from the site http://photo.qip.ru.
Information from collection of Valery Khartchenko