Abstract: The servo system has a fluid damped moving mass, a pickoff providing a signal indicative of the position of the moving mass, and a torquer disposed to move the mass. A single operational amplifier has a pair of inputs and an output. One input is connected to the pickoff signal and the other is connected to a reference signal. A feedback path extends between the operational amplifier input and output, and includes a temperature sensitive combination in series with a feedback resistor. A basic gain control resistance is connected between the node located intermediate of the temperature sensitive combination and feedback resistor and the reference signal. Basic gain and gain change over a temperature range are independent of interaction therebetween as each is set, and a selected servo system operational characteristic is maintained substantially constant over the temperature range.