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Thanks Glen. A good reminder about condensation.
I tried another test, limiting the cooling to 17 degrees and not using any thermal grease on the 1/4 camera bolt. The outer case stays about the same temperature as the sensor and there is no fog on the outside of the sensor window at that temperature on a humid 25 degree night.
Dropping from 35 degree sensor to 17 degree sensor changes dark frame standard deviation on Fits Liberator from 16.9 to 4.9 so a big improvement according to Primaluce cooling discussion. Am not sure how to judge from the histogram otherwise.
I wonder if I can control the 12 amp TEC module with a 14 amp rated dew heater controller using a 12 amp fuse. Any suggestions?
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