These pictures show a temperature of 400 degrees. This is adequate for my uses. In an earlier experiment I had CD's covering every available square ...
This is an exercise in recycling and alternative energy use. I used a discarded 62 inch satellite dish and used CD's to create this along with materials that I had laying around. Nothing was purchased for this project.
I did not have the base, so I made one from 3" ABS plastic pipe inserted in the ground about 18". I then filled it with concrete and re-rod for stability.
Step 2: Attaching CD's
I used a combination of 1/8" X 3/4" fender washers and #4 by 3/8" machine screws for most of the CD's and a tube of leftover silicone adhesive to attach the outer 2 rows. If you have a fiberglass dish, you would simply use the silicone adhesive for all. The CD's were procured from a high school. They were obsolete. The pre-recorded read only discs seem to last longer and produce slightly more reflectivity than recordable discs.
Step 3: Making the cooker
This unit did not come with the receiver. I estimated the focal point using the existing supports for the original receiver. All the parts were things I had in the garage. I also happen to have a welder. Depending on what type of cooker you decide to use will dictate the type of support you should fabricate. I used a 10 x12 wire cooker but you can use anything you have. It must swivel though.
You adjust the distance from the focal point to change temperature and to allow use of different cooking vessels.
Step 4: Aiming device
Using the original dish adjuster is perfect for aligning the dish. I believe that this is a 24 volt DC adjuster. I only had a 12 volt battery available. It works but is slower.