RT-70/GRC is a low power transceiver with frequency range 47-58 MHz FM (VHF) continuous tuning or two presets. Channel spacing 100 kHz. Bandwidth 60-80 kHz with noise operated squelch. Power output 0.5 Watt. Range about 1 mile. Power requirements 90 VDC and 6 VDC The RT-70 Transceiver with the power amplifier AM-65 are also mentioned as subassemblies of radio sets GRC-3, GRC-4, GRC-5, GRC-6, GRC-7, GRC-8, PRC-16, or vehicular unit as VRC-7
Tubes (1) 3B4, (4) 3Q4, (3) 3A5, (3) 1L4, (6) 1U4, (1) 1R5, (1) 1S5, (1) 1AE4.
Applicable technical manual TM-11-290