USSR VHF transceiver type R-407 M

USSR R-407 M was developed as a single channel full duplex radio-relay for either 2 or 4 wire connection. It was primary used in combination with other communication equipment either as an emergency link or during set-up of a station.
The equipment uses valves throughout.

• Frequency range 52-60MHz.
• RF output 1 Watt
• Modulation FM R/T only.
• Channel spacing 50kHz.
• Powered by two sets of 2.4V NiCad batteries.
• AF bandwidth 0.3-3.4 kHz. Ringing tone 30-50Hz.