Peltier coolers can be found for under $10. They're used to cool CPUs in some
microcomputers.
Sent from my iPad
On Aug 3, 2015, at 9:01 AM, Norman Yarvin <yarvin@xxxxxxxxxxxx> wrote:
On Mon, Aug 03, 2015 at 08:10:31AM -0400, Anthony Cesaroni wrote:
A waste of perfectly good energy. Google "stirling coolers" or
"stirling cryogenic coolers". About as efficient as you can get in a
small package with insane MTBF. There's a few of them in orbit.
They're also used in cell phone towers, so can be had at more
down-to-earth prices.
"Such RF filters with their integrated cryocoolers can be
found on eBay for under $300."
-- Ben Krasnow, at
http://benkrasnow.blogspot.com/2008/08/diy-liquid-nitrogen-generator.html
--
Norman Yarvin http://yarchive.net/blog