The APT5-07700850-55K13-D6-S from AmpliTech, Inc. is a RF Amplifier with Frequency 7.75 to 8.5 GHz, Gain 50 dB, Gain Flatness ±1 dB, Noise Figure 0.75 dB. Tags: Drop-In, Low Noise Amplifier. More details for APT5-07700850-55K13-D6-S can be seen below.