The 200A400A from AR RF/Microwave Instrumentation is a RF Amplifier with Frequency 10 kHz to 400 MHz, Gain 53 dB, Gain Flatness ±3 dB, Output Power 50.97 to 51.76 dBm, Output Power 125.03 to 149.97 W. Tags: Power Amplifier. More details for 200A400A can be seen below.