The Amplifier Research 10W1000B is a portable, self contained, air cooled, broadband, solid-state amplifier designed for applications where instantaneous bandwidth and high gain are required. Push pull circuitry is utilized in the high power stages to lower distortion and improve stability. The Amplifier Research 10W1000B, when used with an RF sweep generator, will provide a minimum of 10 watts of swept power. Included is a front panel gain control which permits the operator to conveniently set the desired output level. Typical applications of the Amplifier Research 10W1000B include antenna and component testing, wattmeter calibration, EMI susceptibility testing, as a driver for frequency mulitipliers and as an RF source for magnetic resonance imaging studies. The RF Amplifier stages are protected from over temperature by removing the DC voltage to them if an over temperature condition occurs due to cooling blockage or fan failure. The 10W1000B includes digital control for both local and remote control of the amplifier. This 8-bit RISC microprocessor controlled board provides both IEEE-488 232 control of all amplifier functions.