The original, point-contact 1N34A Germanium diode
are the classic 1N34A, 50 cents each.
These are the glass 1N34A that have a highly sensitive,
point-contact to the Germanium chip inside.
Use to build various Crystal Radio circuits. Crystal
Radio's do not need any power source, only a wire
antenna 10 to 20 feet high, and 20 to 40 feet long.
1N34A 1N60, 1N295, Germanium Diode,TV FM AM Radio ...
Diagram below is a Germanium Diode AM/FM Crystal Radio.
1N34a, 1N60, 1N295