Heathkit HA-202A 40-Watt Amplifier Useful with 2 meter transmitters Operating voltage: 12 to 16 volts DC (PS-1175) Output power: 40 watts minimum for 10 watts in Automatic T/R switching Tuned input & output Withstands VSWRs of up to 3:1 Internally adjustable for any 1.5 MHz portion of 143-149 MHz band Alignment requires VTVM