The HE390B from BOWEI Integrated Circuits is a RF Amplifier with Frequency 20 to 520 MHz, Gain 15 to 16.5 dB, Gain Flatness ±0.6 to 1 dB, Noise Figure 2.3 to 3.5 dB, Output Power 28 to 29 dBm. Tags: Drop-In, Power Amplifier. More details for HE390B can be seen below.