Car radio "Tourist".
Car radio and electrical equipment.Car radio and electrical equipmentThe "Tourist" car radio has been produced by the Murom Radio Plant since the 1st quarter of 1970. The radio is intended for intercity and tourist buses. The schematic diagram from the input circuits to the detector is similar to the RF part of the AT-66 receiver. "Tourist" is designed to receive programs from radio stations operating with AM in the LW, SV and FM in the VHF range. Sensitivity in the ranges: DV - 150, SV - 50, VHF - 5 µV. Adjacent channel selectivity - 34 dB. Selectivity on the mirror channel in the ranges DV 40, SV 36 and VHF 30 dB. AGC provides a change in the output voltage by 8 dB, when the signal at the input changes by -40 dB. The bass amplifier is redesigned. Instead of 5 transistors, 7 types MP-39B, MP-41, MP-25 and P-217B are used here, separate tone control for LF and HF has been introduced, to reduce distortions, the depth of negative feedback is increased. Rated output power 5 W, maximum 7. Frequency response in the band 80 ... 8000 Hz 3 dB. SOI at frequencies 200 ... 400 Hz not more than 5%. The range of tone control is +6 and -10 dB. The speaker system consists of six 1GD-28 loudspeakers located in the cabin and one control loudspeaker. A microphone is connected to the amplifier and there is a gain control. Powered by a 12.8 V wiring system. Power consumption 18 watts. The dimensions of the radio receiver are 247x115x270 mm. Weight - 4.2 kg.