1911user
Veteran Member
If you are going to count on one of these, try to assemble the materials and build/test a few before actually needing one. I don't have a link, but have read comments about difficulty finding the very specific size can and specific type sewing thread needed for the design. They were common materials in the 1970's, but perhaps not so common now.Download the the free pdf version.
Do it yourself rad meter. Appendix C. The instructions are laid out so you can copy them and make booklets to hand out.
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