Abstract: A power control system for controlling the power output of a power amplifier. The power control system draws power from a variable voltage supply, such as a battery, and receives a signal input which indicates the desired power output. The power control system includes a power amplifier for amplifying an electrical signal which draws a current from the variable voltage supply. The power amplifier is of the type wherein the operating current drawn by the power amplifier is indicative of the power output. The power control system additionally includes a current sense circuit, which is operably connected between the variable voltage supply and the power amplifier and which senses the current drawn by the power amplifier and simultaneously produces an output current, which is directly correlated to the sensed current. The output current and the signal input are compared in a controller which produces a control signal for controlling the power output by the power amplifier.