The R-609 radio set

The R-609 radio set is intended for simplex telephone communication in the frequency range from 100 to 150 MHz with the setting of the operating frequencies of the transmitter and receiver by interchangeable crystals. The set can be preliminary tuned in this range on any four operating frequencies and search-free communication carried out on them. Switching from one communication channel to another is realized automatically by pressing the appropriate button on the control panel or on the measuring unit, for which no more than three seconds are required. Thirty crystals each for the transmitter and the receiver are usually attached to the operating set of the station. The radio set utilizes a wide-band discone antenna, ensuring communication in the entire range of frequencies, or a half-wave vibrator. The radio set is powered from an alternating current network with a voltage of 110, 127 ro 220 V, and also from an on-board direct current network through a voltage converter of the types OP-120 and AMG-3.