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Old School Radio - I havent built a crystal radio set since I was a kid.
Decided to really do it right this time.
No batteries or AC power. It all comes thru the radio waves in the air.
The electronics consists of a germanium diode, a 47K micro resistor, a variable 0-201pf capacitor, a 20k ohm Piezoelectric earphone, ground wire, and an antenna wire stretched from the house across my backyard to my workshop.
All hardware is brass and the coil is hand wound with transformer wire and then coated with polyurethane as is the wooden base.
Works like a champ tuning in AM stations !