The AR4819-50 from Comtech PST is a RF Amplifier with Frequency 400 MHz to 1 GHz, Gain 47 dB, Gain Flatness ±1 dB, Noise Figure 10 dB, Output Power 46.99 to 47.4 dBm. Tags: Benchtop / Rackmount, Power Amplifier. More details for AR4819-50 can be seen below.