The Model 477 from Applied Systems Engineering is a RF Amplifier with Frequency 2 to 18 GHz, Output Power 67.78 to 69.03 dBm, Output Power 6000 to 8000 W, Peak Power 6 to 8 kW, Spurious -50 dBc. Tags: Benchtop / Rackmount, Travelling Wave Tube Amplifier, Power Amplifier. More details for Model 477 can be seen below.