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Originally Posted by davidpretorius
thanks bird, anyone ever pulled one apart??
Also bird, do you agree that an isolated system is better to cool than exhausting and intrcoducing air from the outside??? from a cooling point of view. obviously less dust
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I'm convinced that one of the best ways to cool a scope is to have the mirror end sealed to prevent any air exchange with the outside and cool around the mirror with peltiers and internal fans.
Doing this on my scope has totally stopped any tube currents and slow seeing effects. With temp sensors inside and outside it's possible to get the air around the mirror to a stable temperature, and because the tube is not open at both ends there is no airflow inside the tube.
This also prevents excessive dewing etc, as once the air in the tube has dumped its moisture then it stays dry for the rest of the night.
cheers, Bird