Portable radio `` Quartz-404 ''.
Portable radio receivers and radios on p / p.DomesticThe portable radio receiver "Quartz-404" has been producing the Kyshtym radio plant since 1973. Since 1972, the Kyshtym Radio Plant has started serial production of a small-sized portable transistor radio receiver of the 4th class `` Quartz-403 ''. In the middle of 1973, it was replaced by the Quartz-404 receiver, and since 1974 by the Quartz-405 receiver, while the production of the Quartz-404 model continued until 1982, and in 1979 in In connection with the assignment of the Olympic symbols to the receiver, it was modernized into the Quartz-404M receiver, in 1980, instead of the letter M, the receiver was given the name Quartz-404 Olympic. All models are based on the Sokol-403 radio receiver, they have the same electrical and wiring diagrams and differ in design. They operate in the LW and MW bands. Reception is performed on an internal magnetic antenna or, if necessary, on an external antenna. The sensitivity to the internal antenna is 3.0 mV / m in the LW range and 1.0 mV / m in the MW range. Selectivity on the adjacent channel is 20 dB in the LW range and 16 dB in the MW, the attenuation of the image channel is 20 dB. AGC provides a 10 dB change in the signal voltage at the receiver output, when the input voltage changes by 26 dB. The manual volume control range is -40 dB. Operating frequency range 450 ... 3150 Hz, average sound pressure 0.15 N / m2, rated output power 100 mW. Powered by a Krona battery or a 7D-0.1 battery. The operability is maintained when the voltage drops to 5.6 V. The dimensions of the receivers are 170x100x40 mm, their weight is 480 g.
