Portable MQ-77 VHF transmitter-receiver, modified for 25 KHz channel spacing.
Used by the US military in the 1980s, designated AN/PRC-1177.
Frequency range: 30 to 75.95 MHz; FM (Frequency Modulation); 1840 channels; output power: 1.5-2 Watts; battery: BU-3386 or BU-5598; weight: 10 Kg; range: 8 Km.
