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From 1946 to 1948, the radio receiver detector "ZIF-2" produced a pilot plant number 326 named after M.V. Frunze NCAP. The receiver is designed to listen to the programs of broadcasting stations on headphones (use of two pairs is allowed). As a detector, you can use a zwitter or a regular, crystalline. The range of received waves is 300 ... 1800 meters. When using an antenna 40 meters long, with a suspension height of 15 meters and grounding, local radio stations can be received with sufficient loudness at a distance of up to 150, and central ones up to 500 kilometers.