Network tube radio receiver "KEMZ".
Tube radios.DomesticSince the 4th quarter of 1929, the Kaluga Electromechanical Plant has been producing the network lamp radio receiver "KEMZ". The KEMZ radio receiver (code name) is a single-lamp (MDS lamp) regenerator operating in the range from 225 to 2000 meters. The output power of the receiver is sufficient to operate the "Record" loudspeaker. Power is supplied from a 120 volt alternating current network. The incandescences of 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 has a rectified voltage of about 90 volts. More details about the radio receiver and its wiring diagram can be found in the documentation below.