Quote:
Originally Posted by Paul Haese
...Two can drop the temperature about 30 degrees C in 2 hours. So that is 15 degrees an hour.
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Paul, I had assumed (in my blissful SCT ignorance) that the object was to achieve thermal equilibrium - by which I have understood bringing the mirror down to ambient temperature. On a 5 degree night, you want the primary (and the rest of the OTA as well) down to the same level - but not lower. Or have I missed something quite fundmental? Do you cool the OTA below ambient?
Peter