Somehow, I expect a crystal radio will survive an EMP that fries every P-N junction in a digital device... That's robust. Crystal radios don't even need batte

Somehow, I expect a crystal radio will survive an EMP that fries every P-N junction in a digital device... That's robust. Crystal radios don't even need batteries. https://en.wikipedia.org/wiki/Crystal_radio https://en.wikipedia.org/wiki/Crystal_radio