The 6538 from Ophir RF is a RF Amplifier with Frequency 2.5 to 7.5 GHz, Gain 35 dB, Noise Figure 35 dB, Output Power 56.98 dBm, Output Power 500 W. Tags: Benchtop / Rackmount, Travelling Wave Tube Amplifier, Power Amplifier. More details for 6538 can be seen below.