I can and have built crystal radios with a chunk of galena, an empty cigarette pack, a sheet of newspaper, a toilet paper roll and a bunch of wire.
It's good for cooks to know the basics of technology, and how to build them from scratch. You just never know what might happen in a commercial kitchen.
/johnny
They condenser is the key - most likely to fry, hard to replace.
OBTW, you have listed the makings for the threat ...
You are older than you look.