Quote:I have never used the chemical hand warmers, so would these work, if I just used a large rubber band to hold it to the back of the COL?
Orion XT12i with Swayze-refigured primary & Protostar secondary
Televue NP101 refractor
William Optics Megrez 90 refractor
Universal Astronomics Deluxe Mounts
My eyepieces are made from the waste product of exploding stars.
10XTi 102XLT ST80A(2" Focuser); President, Eypieces Anonymous, Denver Chapter (Hello, I'm an eyepiece junky, what's your excuse?)
DAS Dark Site
Quote:There are times when I use the COL out in the cold and the LCD 'acts' up.I have built a 'COL' heater with 5 parallel 276 ohm wire-wound resistors.Works with a 9V battery and should work with a converted battery pack from a metal detector:http://www.cloudynights.com/ubbthreads/showflat.php/Cat/0/Number/5531844/page...Uses 8 - NiMH AA Batteries.But, that would mean re-running the power cable from the fan to the 'COL' heater after the mirror has stabilized.I have never used the chemical hand warmers, so would these work, if I just used a large rubber band to hold it to the back of the COL?
SyedTeeter STS 11 f/4.3 Zambuto | XT8i | XT8g | XLT 150 | C90 | EON 80mmAT Voyager and Nexstar SLT mountsEyepieces: Mostly TeleVue and PentaxDenk II BV'er, Earthwin PFS-SE, Pentax 10x50 PCF WP II
Quote:I was having similar issues with my COL display and was using a new akaline battery. I remembered the wireless indoor/outdoor thermometer we have did the same thing in cold weather. The thermometer manual strongly recommended using a lithium battery, so I tried one in the XT10i hand piece and the display stopped flickering.YMMV.