Re: Cooldown time?

On Wed, 03 Dec 2003 06:50:58 GMT, "Bob Weber" <[EMAIL PROTECTED]> wrote:

>Refractors have zero cool down time.

Nuts. I've certainly seen plenty of instances of tube currents in refractors,
and for sudden temperature changes you can have errors in figure lasting quite a
few minutes.

Refractors just cool faster than most other designs because their thermal mass
is at the front of the tube, and because their small diameter means they have a
large surface area to volume ratio.

_________________________________________________

Chris L Peterson
Cloudbait Observatory
http://www.cloudbait.com