Preventing condensation on 13 inch Meade dob

  1. richlite
    I have been struggling with condensation on the mirror as it is in the manufacturers tube. Here is what I have done: I drilled a 1 inch hole just above the level of the mirror (yes, I removed the mirror first! lol) and the attached a small computer cpu fan to the outside of the tube over the hole. It is 12 volts and has no vibration to it. Helps a lot! I also found a silica packet, 2 inch square, that I have set below the mirror to suck up any missed moisture. Working great!
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