supercooling

[Tom Azlin, N4ZPT]

Hal Feinstein wrote:

> I know that radio astronomers often supercool some of their receiving 
> equipment to lower the
> noise  and thereby improve its sensitivity.  As a thought  experiment, 
> would it be practical for a ham
> to supercool parts of  the receiving chain of a system that was built 
> to receive a very weak signal?
> I'm thinking that the equipment, for example a low noise converter, 
> could be placed into some kind of protective jacket and emersed in 
> some supercool O2 or CO2 (dry ice).  First, does it make sense from a 
> radio engineering/physics point fo view?   Second, is their a 
> practical way to do this without elabroate equipment.   Third, anyone 
> in the amateur community tried this?
>
> --hal  wb3kdu
>
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>
Hi Hal,

Kerry , WA4BQM, is a radio astronomer (and member of VWS) who might be 
able to answer your question. 

73, Tom n4zpt