The QBS-517 from Spectrum Control is a RF Amplifier with Frequency 900 MHz to 1 GHz, Gain 46 to 47 dB, Output Power 44.5 to 46 dBm, Output Power 28.18 to 39.81 W, P1dB 44.5 to 46 dBm. Tags: Power Amplifier. More details for QBS-517 can be seen below.