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Thanks for all the replies guys but I'm not excatly sure what most of you thought of the original question..?
I was keen to hear opinions, for and against, for the practice of placing a heated strip within the tube wall and slightly in front of the primary as a means of heating the tube wall near the primary, in order to prevent dew formation on the primary mirror in a closed rear-end scope that also has rear cooling fans..?
Wadaya recon..?
MIke
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