Chalcopyrite Mineral Crystal Radio Diode Cast In Brass Cup For Perikon Detector

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