| Hi Alan,
You won't get a reliable BEC supply for your radio from a 4.8volt supply.
You will have to have at least 6volts, preferably 7.2. The only way around it will be either to take a tapping straight off you motor battery, but expect a lot of interferrence and glitching as the power runs down or fit another seperate 4.8v pack for your radio.
John |