The Model 150L is a self contained, broadband amplifier intended for laboratory applications where instantaneous bandwidth, high gain, and moderate power output are required. When used with a frequency swept signal source, it will provide 150 watts of swept power. The Model 150L employs the most up-to-date design technology in both its solid state, low level amplifier and vacuum tube final amplifier. All operating controls are functionally grouped on the front panel to simplify operator use. They include modern, lighted push button switches for the command functions, POWER, STANDBY, and OPERATE and a gain control for setting the output level of the amplifier.