The JGF051B from BOWEI Integrated Circuits is a RF Amplifier with Frequency 10 to 200 MHz, Gain 56 to 60 dB, Gain Flatness 1 to 3 dB, Supply Voltage 0.7 to 5 V, Current Consumption 90 to 110 mA. Tags: Drop-In, Automatic Gain Controlled Amplifier, Variable Gain Amplifier. More details for JGF051B can be seen below.