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Old 06-06-2011, 02:07 PM
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big_dav_2001 (Davin)
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Join Date: Feb 2010
Location: Schofields, NSW
Posts: 401
Question Dew Control; help needed

Hi Guys and Girls ,

Its been a while since i posted, and i hope you could help me out yet again.

Im looking at investing in some dew control gear, but im not sure exactly what i need.

Im looking at heating my 12-inch solid-tube GSO Dob, as well as possibly my eyepieces and Telrad finder, while the eyepiece and telrad heaters are pretty self-explainatory, i just have a few questions regarding the heating of the OTA / Primary.

- Would i need a dew heater band for my OTA, or would a dew shield work?? (or both??)... ive heard that shields only work with Cassegrains...

- What brands would you recommend, and are the different brand's parts interchangeable??... eg: a Kendrick band and a Dew-Not controller??

- Is it necessary to use a controller, or can the bands be hooked directly into the power source??

- ( stupid question alert ) Where exactly does the heater band go?? is it wrapped around the OTA down close to the primary??.. wrapped around the circumference of the primary its-self??.. or around the middle of the tube to radiate the heat evenly?? (ive also seen heaters that are glued onto the back of the primary mirror...would these be more effective??)

- Does the secondary need to be heated also??

Any help you can give would be hugely appreciated, thanks in advance

Davin
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