Transistor network electrophone `` Phoenix-002-quadro ''.
Electric record players and electrophones on semiconductorsDomesticSince the 1st quarter of 1977, the "Phoenix-002-Quadro" transistor network electrophone has been experimentally produced by the Lviv Telegraph Equipment Plant. The first in the USSR quadraphonic high-class electrophone "Phoenix-002-Quadro" provides quadraphonic reproduction of phonograms from external sources; pseudo-quadraphonic reproduction of mono and stereo recordings from gramophone records and an external tape recorder; normal reproduction of mono and stereo recordings from EPU and tape recorder; re-recording of phonograms from gramophone records to magnetic tape. The top-class 0-EPU-2S stereophonic two-speed electric player is equipped with a magnetic head of the GZM-105 type with a diamond needle. In order to reduce the detonation of sound in the EPU of the model, a massive disk is used, which is set in rotation by a low-speed synchronous electric motor using an elastic belt. The engine is powered by a special amplifier with a master oscillator, the frequency of which determines the rotational speed of the disk. The stroboscopic device and the adjustment knob make it possible, within certain limits, to change the rotational speed of the disk. The EPU has a manual and automatic microlift, an auto-stop and a mechanism for returning the pickup to its original position after playing a record. The four-channel amplifier of the microphone contains a four-channel preamplifier with separate tone control for LF and HF. There is a device providing a pseudo-quadraphony effect, a two-channel differential converter, consisting of phase inverters and amplifiers. UM and BP as in Phoenix-001-S. The microphone is equipped with 2-way АС 20АС-5, in each of which there are 4 LF heads of the 4GD-43 type and 2 HF heads of the ZGD-31 type. It is possible to listen to records on quad and stereo telephones. Rated output power at harmonic distortion 1% - 4x15 W. The nominal range of operating frequencies in terms of sound pressure with uneven frequency response ± 6 dB - 63 ... 18000 Hz. Knock coefficient ± 0.15%. Vibration interference level -60 dB. Power consumption 180 watts. The dimensions of the microphone are 640x460x210 mm. One speaker 440x315x255 mm. The mass of the microphone is 30 kg, one speaker is 10 kg.
