The galena XTAL is replaced by a germanium diode in this Project. Diodes such as the 1N60 or 1N34 can be used with better results than a galena XTAL. Coil is formed by 100 turns of 28 or 26 AWG wire in a card tube with 1 inch of diameter, CV is found in old transistor or tube MW radios and the antenna is a long wire (5 to 20 m). Ground is important and can be made in any large metalic object. The earphone is a crystal type or a piezoelectric transducer.
Modern Crystal Radio
