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How to build a solar oven with cardboard boxes, tin foil and plexiglass
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I've done this and it definitely works, but it's also finicky for sure. What I'd really like to know is how to build a DIY evacuated tube. AFAIK, the current very best designs for a solar oven use one, and almost nobody seems to manufacture the things.
Like this kind of thing?
https://en.wikipedia.org/wiki/Solar_cooker#Vacuum_tube_technology
Yeah exactly! I'm not sure how they're made... Maybe like a vacuum chamber that is also a glovebox? So you could put the tube+lid in the chamber, evacuate the atmosphere, use the gloves to apply the lid, then release the vacuum? Do gloveboxes work under vacuum?