The QPA-4000-12000-43-43S from Qualwave is a RF Amplifier with Frequency 4 to 12 GHz, Gain 43 dB, Gain Flatness ±1.5 dB, Saturated Power 43 dBm, Saturated Power 19.95 W. Tags: Power Amplifier. More details for QPA-4000-12000-43-43S can be seen below.