The APTMP4-00050100-1333-D9 from AmpliTech, Inc. is a RF Amplifier with Frequency 50 MHz 1 GHz, Gain 43 dB, Gain Flatness ±1.5 dB, Noise Figure 1.30 dB, Operating Temperature 0 to 50 Degree C. Tags: Low Noise Amplifier. More details for APTMP4-00050100-1333-D9 can be seen below.