The 250TR7z5G18 from AR RF/Microwave Instrumentation is a RF Amplifier with Frequency 7.5 to 18 GHz, Gain 54 dB, Gain Flatness ±12 dB, Harmonics 5 dBc, AC Voltage 190 to 260 V. Tags: Travelling Wave Tube Amplifier. More details for 250TR7z5G18 can be seen below.