Semiconductor Chalcopyrite Perikon Crystal Radio Diode Cast in Brass Cup

Description

Experimental Semiconductor Crystal Radio Crystal Radio Diode Cast in Brass Cup
Size, Color and shape may vary from pictures
Chalcopyrite is a copper iron sulfide mineral that crystallizes in the tetragonal system. It has the chemical formula CuFeS2.
Chalcopyrite has
electrical characteristics suitable for use as a detector in Crystal Radios.
The "Perikon" Crystal Radio detector for example used two minerals, A Fixed Cup Chalcopyrite and
Zincite
or Bornite in the movable section.
Cast Bornite Crystals Coming Soon to my eBay Store.
It is also possible that
Chalcopyrite will also work in a standard cat whisker detector stand but may require some type of circuit biasing.
1 piece
Crystal
Chalcopyrite
Detector
Crystal mounted and Cast in a 13mm" Diameter brass cup
Casting alloy is made from Lead, Tin and Bismuth-Cadmium Free