The APT4-00502650-4008-D4 from AmpliTech, Inc. is a RF Amplifier with Frequency 500 MHz to 26.5 GHz, Gain 18 dB, Gain Flatness ±2.5 dB, Noise Figure 4 dB, Output Power 8 dBm. Tags: Low Noise Amplifier. More details for APT4-00502650-4008-D4 can be seen below.