[Space] condensation on lenses
bklofas at gmail.com
Wed Jun 9 16:16:28 PDT 2010
A while back I built a small bell-jar thermal vacuum chamber at work.
The thermal plate goes down to -50 degC, and pressure down to 0.2 torr
(about 60km/200k ft). It's in use this week, but next week I think it's
free. I could try some different "heated window" designs if you want me to.
Bryan Klofas, KF6ZEO
On 06/09/2010 10:20 AM, Jonathan Moore wrote:
> On Wed, Jun 9, 2010 at 10:08 AM, Blake Barrett<Blake at blakebarrett.net> wrote:
>> The thought of using a hand warmer has arisen before, but all the ones we
>> have come across are either electric (and thus requires batteries) or are
>> chemical based that require oxygen to create their heat.
> Backus uses the air breathing hand warmers and it has worked out well for them.
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