The APTMP4-04390501-0617-D4-SB-GW from AmpliTech, Inc. is a RF Amplifier with Frequency 4.39 to 5.01 GHz, Gain 42 dB, Gain Flatness ±0.8 dB, Noise Figure 0.60 dB. Tags: Low Noise Amplifier. More details for APTMP4-04390501-0617-D4-SB-GW can be seen below.