The Amplifier Research Model KAA1030 is a general-purpose, class ABTone, wideband RF power amplifier for signals in the 500 KHz to 50 MHz frequency range. No tuning, band switching, or adjustments of any kind are required to operate this unit. Power output is in excess of 50 Watts into a 50-Ohm load. Power gain is a minimum 47 dB making the amplifier compatible with drive power levels provided by most commercially available signal generators. Protection against excessive heat rise of the amplifier module heatsink is by a temperature-sensing switch that interrupts the gate bias supply to the amplifier devices when activated. Operation resumes automatically when temperature has returned to normal operating temperature. The KAA1030 has built in VSWR protection.