The dB-4051A from dB Control is a RF Amplifier with Frequency 17.5 to 40 GHz, Gain 48 dB, Gain Flatness ±3 dB, Output Power 40 to 60 W, Harmonics -4 dB. Tags: Benchtop / Rackmount, Travelling Wave Tube Amplifier. More details for dB-4051A can be seen below.