The crystal set, constructed on some scrap plastic. Connections are made easier via the terminal strip on the side.
A pair of vintage headphones used with the set. Made by Allied Radio, 1925. Headset is plenty loud with an impedance of 4000 ohms.
-You may use a loudspeaker if you have a transformer who's primary is >2K ohms with a secondary close to the impedance of your speaker. mileage may vary depending on speaker size. experiment a little!
-For best results, use a LONG ANTENNA!