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Portable transistor radio "Quartz-402" from 1972 produced Kyshtym radio plant. Rare enough receiver in the USSR. It is a modernization of the model "Quartz-401" of the same factory of 1971 of release. Instead of the LW model, the survey KV range is applied, covering the sections of 25, 31, 41 and 49 meters. The sensitivity of the model with an integrated telescopic antenna in the HF range of 300 Î¼V. Selectivity on the mirror channels 12 dB. According to other technical characteristics, the '' Quartz-402 '' radio receiver coincides with the base one. The radio was mainly exported, but was sold in the USSR, and with both English and Russian letters in the name.