B&Z Technologies' Cryogenically Cooled Amplifiers are designed and manufactured to be operated at cryogenic temperatures. Amplifiers in this category are normally used in research and scientific applications. B&Z Cryogenically Cooled Amplifiers are being operated at temperatures as low as 12K. Noise temperatures as low as 12K measured at liquid nitrogen temperature can be achieved. The engineers at B&Z technologies have been designing and building amplifiers intended for cryogenic cooling for decades. We have the experience and knowledge required to manufacture amplifiers that can be repeatedly cycled down to cryogenic temperatures with no mechanical or electrical degradation.