The 100A250B from AR RF/Microwave Instrumentation is a RF Amplifier with Frequency 0.01 to 250 MHz, Gain 50 dB, Noise Figure 8 dB, Output Power 48.7 to 49.5 dBm, Output Power 74.13 to 89.13 W. Tags: Benchtop / Rackmount, Power Amplifier. More details for 100A250B can be seen below.