Thread: Heating the tube to keep dew of a Newtonian mirror
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Old 07-02-2010, 08:41 AM
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Garyh
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Location: Glen Innes, N.S.W.
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Hi Mike,
I find a fan under the primary does a excellent job, never had dew on the primary even on a real dewy night.
Secondary mirror heater is recommended but as I have had this fog up occasionally without the heater on. Just a 1 watt or so.
Gary
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