Keywords: Coherer.jpg en This is a metal filings coherer it consists of a tube or capsule containing two electrodes spaced a small distance apart with metal filings in the space between them When a radio frequency signal is applied to the device the initial high resistance of the filings reduces allowing an electric current to flow through it 2013-05-25 22 22 57 The source is the Wikipedia entry Coherer url http //en wikipedia org/wiki/Coherer J A Davidson specifically JA Davidson cc-zero Uploaded with UploadWizard Radio History of radio Coherers |