I noticed in the manual for my Icom M600 that they recommend transmitting
only with the engine running. I assumed this was to offset the high current
draw. I also noticed they show 13.6 volts as the supply voltage so now I'm
wondering if this is another reason for having the engine running? Will the
radio not transmit at full power if it doesn't get 13.6 volts? I figure my
4 T-105s can supply the current but they don't supply 13.6 volts.