The AR4819-25 from Comtech PST is a RF Amplifier with Frequency 400 MHz to 1 GHz, Gain 44 dB, Gain Flatness ±1 dB, Noise Figure 10 dB, Output Power 43.98 to 44.77 dBm. Tags: Benchtop / Rackmount, Power Amplifier. More details for AR4819-25 can be seen below.