nostr:npub1ptmc89knq87ntjwhcehfzexgu6uvfjh3skrtn2pkcc60smljm5ys696rn8 I will if it's also a Faraday cage. It probably is. In college we visited a radio observatory nearby (chosen for its position in a small valley with lots of surrounding hills to block terrestrial signals). They had one for testing antennae and receivers. It was definitely a Faraday cage too.

They let us in to see, but wouldn't let us go in alone, or close the door.