The old microwave oven idea is great. Do they really work? No micro wave out, none in I suppose.
Think I read somewhere you have to cut the cord off, but I could be wrong. Anyone know?
You are exactly correct. Just like a shielded or screen room used in RF testing. Before retiring I was a EMC engineer. Even now I dabble using an inexpensive spectrum analyzer. Called a “RF Explorer”.
Any strong EMP source could cause total failure of communication equipment. As a prepper for TEOTWAWKI it is good to prepare.