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Radio "VEO" (conditional name) was developed by the Leningrad laboratory of receiving devices "VEO" in 1931. Radio "VEO" is built according to the scheme of direct amplification 2-V-2 with power from the electrical network and is designed to work in the range from 200 to 2000 meters. The sensitivity of the receiver with a good outdoor antenna and grounding from 200 on long waves to 550 µV on medium. Selectivity is also variable, and by modern standards it ranges from 25 to 35 dB on long waves and from 15 to 25 dB on average.