The APT3-00400350-1010-D4 from AmpliTech, Inc. is a RF Amplifier with Frequency 400 MHz to 3.5 GHz, Gain 30 dB, Gain Flatness ±1 dB, Noise Figure 1.00 dB, IP3 40 to 43 dBm. Tags: Low Noise Amplifier. More details for APT3-00400350-1010-D4 can be seen below.