The Model KAA2026 is a special-purpose, wideband RF power amplifier for signals in the 700 kHz to 3 MHz frequency range. No tuning, band switching, or adjustments of any kind are required to operate this unit. Power output is in excess of 125 Watts into a 50-Ohm load. Power gain is a minimum of 53 dB making the amplifier compatible with drive power levels provided by most commercially available signal generators. Construction of this model is in a 5¼-inch high cabinet, 16 inches deep, exclusive of handles, and 10.5 inches wide, with mounting flanges. Input and output connectors are located on the front. Forced-air cooling. 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 the temperature has returned to normal operating temperature.