Quote:
Originally Posted by PCH
John, I see you have a 12" LB like me, - do you have any dew heater mechanism installed for the primary mirror ?
And what do you power this lot from also?
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Hi Paul,
You might find that if you can direct the flow from your primary mirror's fan across the face of the mirror, you both prevent dew formation and improve seeing by breaking down the boundary layer at the face of the mirror. Have a look at Scott Tannehill's IIS article
http://www.iceinspace.com.au/63-400-0-0-1-0.html
I did this with my 12" GSO and it made a big difference in both reducing dew and improving seeing. The box in which the primary of my 16" sits also has this effect and the primary never gets dew formation.