This article is from the Food Preserving FAQ, by Eric Decker firstname.lastname@example.org with numerous contributions by others.
Check out the plans/ideas in Specific Equipment Questions in Part 4.
You really are limited only by your own creativity. Take a read below.
from Stephen Northcutt (pre-1996)
Take an old dead fridge, cut holes in the top as vents. Cover holes
with 2 layers of screen to keep bugs out. Put 100 watt light bulb in
bottom in ceramic receptacle. You can add additional shelves easily by
screwing small woodstock to sides and sliding in net covered frames.
[ be VERY sure to child-proof any and all refrigerator adaptations - ED]
from Anne Louise Gockel (pre-1996)
Also, the newest edition of _Putting Food By_ includes information on
building a smoker with a small fire pit, a ditch with stove pipe and a
large 50-gal drum (from something like honey!). It is a pretty