The QPA35-3-4.2-36 from Qualink Microwave is a RF Amplifier with Frequency 3 to 4.2 GHz, Gain 35 dB, Gain Flatness ±1 dB, Output Power 34 to 36 dBm, Output Power 2.51 to 3.98 W. Tags: Power Amplifier. More details for QPA35-3-4.2-36 can be seen below.