Thread: [TRADED/FOUND] Dewshield for 8" Celestron
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Old 13-12-2011, 10:48 AM
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rainwatcher (Peter)
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Join Date: Nov 2011
Location: Sunbury, Vic. and Talairan, France
Posts: 142
I made one once out of stiff card with some resistors and a small battery. No problem with heat haze from the resitors. Just calculated the wattage I wanted and used Ohms Law.