(from the article `electronics`) ...but not when it has the other—precisely what Fleming`s valve (patented in 1904) did. Previously, radio signals were detected by various ... ...device in which electricity flows through solid semiconductor crystals (silicon, gallium arsenide, germanium) rather than through vacuum tubes. ... Pic...
Found on
http://www.britannica.com/eb/a-z/c/35
A fine adjustable wire, usually copper or gold, that connects to the detector in a crystal wireless receiver. While originally used to describe the mechanical component, the term was sometimes used to refer to the set itself.
Found on
https://www.encyclo.co.uk/local/20820
No exact match found.
