Given the recent discussion about canning, it seems like sealed tin cans would make an effective Electromagnetic Pulse (EMP) barrier. Why not can some inexpensive FRS radios, small transistor radios, and other electronic items in a standard soup-size can? Can some lithium batteries, and you’ll be all set. By the way, it would probably be a good idea to make sure that the lid and can have good electrical contact. Some cans might be lacquered/coated, so it might be wise to check the lid/can continuity with an Ohm meter.
Regards, – JN-EMT
JWR Replies: That is a great idea. Congrats! You’ve just earned yourself a Blinding Flash of the Obvious (BFO) award. I’ll have my order fulfillment partner mail you a free copy of my nonfiction book “Rawles on Retreats and Relocation.”