The QPA40-6-18-43 from Qualink Microwave is a RF Amplifier with Frequency 6 to 18 GHz, Gain 40 dB, Gain Flatness ±1.5 dB, Output Power 41 to 43 dBm, Output Power 12.59 to 19.95 W. Tags: Power Amplifier. More details for QPA40-6-18-43 can be seen below.