Hang a metal chain from the body of your car to the ground. It becomes a farady cage. An aluminum sided house would also ground a lot of energy. A vacuum tube device would not be affected.
“’Hang a metal chain from the body of your car to the ground. It becomes a farady cage. An aluminum sided house would also ground a lot of energy. A vacuum tube device would not be affected.”
It’s a lot more complicated than that.
Grounding doesn’t make or break a faraday cage. RF grounding is very different than an electrical safety ground - and in some cases, an electrical safety ground wire can make your EMP vulnerability worse, not better.