Three-program receiver `` Orpheus-304 ''.
Three-program receivers.The three-program receiver "Orpheus-304" has been produced by the Leningrad plant "Plastpribor" since the beginning of 1986. `` Orpheus-304 '' is a three-program receiver of the 3rd complexity group, designed for receiving and playing back programs transmitted over a dense network of three-program wire broadcasting with a nominal voltage of the low-frequency path of 30 or 15 V, powered from an alternating current network with a frequency of 50 Hz and a voltage of 220 V. In the PT, a push-button method of selecting programs is used, which allows you to switch it to the desired program by pressing the button corresponding to the program number: 1st program - receiving a low-frequency signal of an audio frequency (with and without amplification); 2nd and 3rd programs receive HF - AM signals with carrier frequencies of 78 or 120 kHz. The PT has output jacks for an additional loudspeaker with an impedance of at least 25 Ohm, which can also be used for recording programs on a tape recorder. Sound pressure frequency range (on all channels) 160 ... 6300 Hz. Harmonic distortion at a frequency of 160 Hz for electrical voltage is not more than 5%. The rated output power of the ULF is 150 mW. The nominal output voltage is 1 V. The non-uniformity of the frequency response for the electric voltage is not more than 10 dB. Power consumed from the mains is not more than 4 W. The overall dimensions of the PT are 100x160x282 mm. Weight 1.7 kg.