Mark Conrad wrote in :

Wonder if any hams are experimenting with liquid nitrogen cooled
RF front ends to their rigs, to reduce thermal noise.

With the high background noise floor already present on Earth, would he
few tenths of a dB or so of thermal noise reduction from cryocooling
make any perceptible or significant difference? Above HFis a different
story, I think, but the noise floor on HF -- at least around here -- is
really rottenly high.

--
Mike Andrews, W5EGO

Tired old sysadmin