The APT55-02001800-5011-D6-LM from AmpliTech, Inc. is a RF Amplifier with Frequency 2 to 18 GHz, Gain 60 dB, Gain Flatness ±2.5 dB, Noise Figure 5.00 dB. Tags: Drop-In, Limiting Amplifier. More details for APT55-02001800-5011-D6-LM can be seen below.