[time-nuts] Making a 10811 better

Mike S mikes at flatsurface.com
Tue Sep 20 20:18:00 UTC 2011

At 03:39 PM 9/20/2011, Don Latham wrote...
>Long ago and far away, I recall a friend using a gas that had its
>liquid/gaseous transition near room temperature and was inert (not an
>inert gas) to pressurize a vessel having high impedance circuits in 
>I'm darned if I can remember what it was. Available in so-called "lab
>bottles" ie not monster cylinders.

Trichlorofluoromethane (R-11, CFC-11) has a boiling point of ~24C. It 
is available (although not manufactured, and most commonly in 100 lb 
cylinders), but is the worst of the "Freons" with regard to ozone 

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