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From the 4th quarter of 1929, the net receiver KEMZ was produced by the Kaluga Electromechanical Plant. Radio "KEMZa" (code name) is a single-tube (MDS lamp) regenerator operating in the range from 225 to 2000 meters. The output power of the receiver is sufficient for the work of the "Record" type loudspeaker. Food is carried out from the alternating current main of 120 volts. Filaments at the MDS lamp and the K-2-T rectifier are fed through a step-down transformer, the anode of the rectifier lamp directly from the network, and the MDS lamp is already rectified at about 90 volts. For more information about the radio and its electrical circuit in the documentation below.