On Sat, 09 Dec 2006 12:10:05 +0000, wrote:

Suprisingly, google isn't turning up much useful stuff on this one.

I know a number of people use these, based on silica gel or similar,
inside the aircraft.

Mine is hangared but I know it actually spends quite a bit of time
outside during the day, and I want to make the avionics last as long
as possible.

There are various small mains powered refrigeration-cycle-based units
but I can't easily ensure that a supply is connected. So something
with a replaceable "pack" would be great.

Any suggestions would be much appreciated?

http://www.drytheair.com/xcart/store/catalog/

Ron Wanttaja