The APT5-01690171-45K13-D6 from AmpliTech, Inc. is a RF Amplifier with Frequency 1.69 to 1.71 GHz, Gain 50 dB, Gain Flatness ±0.5 dB, Noise Figure 0.63 dB. Tags: Drop-In, Low Noise Amplifier. More details for APT5-01690171-45K13-D6 can be seen below.