The 125A400 from AR RF/Microwave Instrumentation is a RF Amplifier with Frequency 10 kHz to 400 MHz, Gain 51 dB, Gain Flatness ±2 dB, Output Power 48.75 to 50 dBm, Output Power 74.99 to 100 W. Tags: Power Amplifier. More details for 125A400 can be seen below.