The QBS-256 from Spectrum Control is a RF Amplifier with Frequency 1.8 to 2 GHz, Gain 24 dB, Gain Flatness ±1.5 dB, Output Power 32 to 33 dBm, Output Power 1.58 to 2 W. Tags: Power Amplifier, Driver Amplifier. More details for QBS-256 can be seen below.