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The LIS-3.5 radio direction finder assembly kit has been produced since 1976. The assembled radio direction finder is intended for the sports search "Lys" (low-power radio transmitters) working by telegraph in the range of 3.5 MHz. The sensitivity of the receiver is 50 µV. Powered by the battery "Krona". Mass finder 800 gr. The price of the LIS-3.5 radio direction finder is 46 rubles. At the beginning of 1977, due to virtually absent demand, the production of the set was discontinued.