The APTC3-04001000-1K00-D4-V from AmpliTech is a Low Noise Cryogenic Amplifier that operates from 4 to 10 GHz. It provides a gain of 42 dB, has a noise temperature of 25oK at +23oC case temperature across the band, and a P1dB of -6 dBm. The LNA can handle up to -10 dBm of CW input power, requires a single +0.7 V bias voltage. It is developed using a state-of-the-art pHEMT process. The amplifier is available in a MIL-883, MIL-45208 certified module that measures 1.38 x 0.70 x 0.29 inches with SMA-female connectors and is suitable for applications such as radiometers, nanophysics (electron spin resonance), astronomy/observatory receivers, superconductor research, and satellite receivers.