The Model 10000L is a self-contained, broadband amplifier designed for laboratory applications where broad frequency range, high gain, and high power output are required. The combination of a high power internal load, specially designed, protective circuitry, and rugged liquid cooled tetrodes provides a truly high power broadband amplifier capable of driving any load impedance without power foldback or fear of damage. A rear panel mounted connector is provided for remote control of the POWER, STANDBY, and OPERATE functions. When connected to our CP2001 or CP3000, these functions may be accomplished by TTL or IEEE bus. A continuously variable input attenuator permits the operator to adjust the output level as desired. AR model DC4000 dual directional coupler is available to permit monitoring of forward and reflected power levels.