The 4000TP4G8 from AR RF/Microwave Instrumentation is a RF Amplifier with Frequency 4 to 8 GHz, Gain 66 dB, Gain Flatness ±10 dB, Harmonics 0 dBc, AC Voltage 190 to 260 V. Tags: Travelling Wave Tube Amplifier. More details for 4000TP4G8 can be seen below.