|
The Coreflute wrap I made for the 120mm refractor seen in the pics below, it cost me ZERO!
I used an old election Coreflute poster that I collected after the last Fed election. I collected a few different sized posters as these Coreflute boards are pretty handy things. And these ones are a good size for refractors, with the bigger posters being enough for a 6" refractor.
Even if you need to buy a new sheet, this stuff is not expensive. A small sheet of 3mm thick from Bunnings is less than $10, and can make up to 4 refractor lens shades.
A 40mm 12V fan draws from 0.08A to 0.1A, and less using a PWM. How does this compare to your heating straps?
Alex.
|