>But I'm not sure how much the copper foil will buy you.
It'll do very little. There is a paper authored by US army talking about various EMP protection measures. The minimum reliable protection there is a 12mm thick (half inch) mild steel container with a lead seal.
This is why if there is ever a nuclear war the vacuum tube equipment will be the only stuff that survives.
It'll do very little. There is a paper authored by US army talking about various EMP protection measures. The minimum reliable protection there is a 12mm thick (half inch) mild steel container with a lead seal.
This is why if there is ever a nuclear war the vacuum tube equipment will be the only stuff that survives.