If the goobermint blocks communications I will be tappin code on the 7.62mm band..... Somebody will hear me.
Good point on sparkgap. I carry a germanium 134 an use the old crystal ear bud as I like to teach folks how to make foxhole radios from junk . Crude resistors from 2 paper clips and lead pencil scribble on a scrap piece of paper ...slide em close or far to get what ya need etc.
I try to know a little bit about everything and a lot aboutnothin except that what pays my way through life. Uncle Sugar gave us skills we never forget. Socialists are advised.... We will use em to save this republic.
Stay Safe ...
For caps/condesers, rolled strips of newspaper or wax paper with aluminum foil strips cut narrower work well.
Of course it works best if you understand the principles behind those things.
Ground is most important on a xtal radio. Antennas and patience help tune signals.
/johnny