Radio receiver `` NKS ''.
Receiving and transmitting radio equipment.Since 1935, the NKS radio receiver has been producing the Aleksandrovskiy Radiozavod No. 3 of Naromsvyaz. A special receiver of the "NKS" type and an amplifier of the "UPP" type, intended for joint operation with a receiver, with a device that automatically records radio telegrams on a telegraph tape. In this case, the maximum transmission speed can be brought up to 300 words per minute. In order to combat fading, the radio is equipped with an automatic gain control and provides the ability to simultaneously receive stations on three separate antennas. The "NKS" receiver and the "UPP" amplifier are powered by common batteries with voltages of 160, 40 and 6 V. The "UPP" amplifier amplifies and straightens the signals received by the receiver, then these signals are fed to the recording part of the installation. The "UPP" amplifier can be connected to any type of receiver. The cost of the NKS receiver with the UPP amplifier is 3000 rubles.