The SPA-028-37-05-SMA from Fairview Microwave is a RF Amplifier with Frequency 500 MHz to 2.8 GHz, Small Signal Gain 36 to 37 dB pk-pk, Gain Flatness 2 dB, Output Power 37 dBm, Output Power 5.01 W. Tags: Power Amplifier. More details for SPA-028-37-05-SMA can be seen below.