The 6545 from Ophir RF is a RF Amplifier with Frequency 4 to 8 GHz, Gain 66 dB, Output Power 66.02 to 76.53 dBm, Output Power 4000 to 4500 W, Spurious -50 dBc. Tags: Benchtop / Rackmount, Travelling Wave Tube Amplifier, Power Amplifier, Automatic Gain Controlled Amplifier. More details for 6545 can be seen below.