Matches in DBpedia 2016-04 for { <http://dbpedia.org/resource/Coherer> ?p ?o }
- Coherer abstract "The coherer is a primitive form of radio signal detector used in the first radio receivers during the wireless telegraphy era at the beginning of the 20th century. Its use in radio was based on the 1890 findings of French physicist Edouard Branly and adapted by other physicists and inventors over the next ten years. The device consists of a tube or capsule containing two electrodes spaced a small distance apart with metal filings in the space between. When a radio frequency signal is applied to the device, the metal particles would cling together or \"cohere\", reducing the initial high resistance of the device, thereby allowing an electric current to flow through it. In a receiver, the current would activate a bell, or a Morse paper tape recorder to make a record of the received signal. The metal filings in the coherer remained conductive after the signal (pulse) ended so that the coherer had to be \"decohered\" by tapping it with a clapper each time a signal was received, thereby restoring the coherer to its original state. Coherers remained in widespread use until about 1907, when they were replaced by more sensitive electrolytic and crystal detectors.".
- Coherer thumbnail Coherer.jpg?width=300.
- Coherer wikiPageExternalLink 1898sla.htm.
- Coherer wikiPageExternalLink coherer.html.
- Coherer wikiPageExternalLink enewrc.html.
- Coherer wikiPageExternalLink objects-i=3.001-t=3-n=0.html.
- Coherer wikiPageExternalLink 347062-US-Patent-613809--Nikola-Tesla.html.
- Coherer wikiPageExternalLink 2up.
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- Coherer wikiPageRevisionID "706537791".
- Coherer wikiPageWikiLink AM_broadcasting.
- Coherer wikiPageWikiLink Alexander_Stepanovich_Popov.
- Coherer wikiPageWikiLink Amplitude_modulation.
- Coherer wikiPageWikiLink Antenna_(radio).
- Coherer wikiPageWikiLink Antique_radio.
- Coherer wikiPageWikiLink Audion.
- Coherer wikiPageWikiLink Battery_(electricity).
- Coherer wikiPageWikiLink Camille_Tissot.
- Coherer wikiPageWikiLink Carrier_wave.
- Coherer wikiPageWikiLink Category:Detectors.
- Coherer wikiPageWikiLink Category:Electronic_amplifiers.
- Coherer wikiPageWikiLink Category:History_of_radio.
- Coherer wikiPageWikiLink Category:Radio_electronics.
- Coherer wikiPageWikiLink Cats-whisker_detector.
- Coherer wikiPageWikiLink Charge_carrier.
- Coherer wikiPageWikiLink Choke_(electronics).
- Coherer wikiPageWikiLink Crystal_radio.
- Coherer wikiPageWikiLink David_Edward_Hughes.
- Coherer wikiPageWikiLink Demodulation.
- Coherer wikiPageWikiLink Detector_(radio).
- Coherer wikiPageWikiLink Diode.
- Coherer wikiPageWikiLink Direct_current.
- Coherer wikiPageWikiLink Electrical_resistance_and_conductance.
- Coherer wikiPageWikiLink Electrode.
- Coherer wikiPageWikiLink Electrolytic_detector.
- Coherer wikiPageWikiLink Electromagnet.
- Coherer wikiPageWikiLink Electromagnetic_radiation.
- Coherer wikiPageWikiLink Electromagnetism.
- Coherer wikiPageWikiLink Fermo.
- Coherer wikiPageWikiLink File:Coherer_Rcvr.jpg.
- Coherer wikiPageWikiLink Galvanometer.
- Coherer wikiPageWikiLink George_Forbes_(scientist).
- Coherer wikiPageWikiLink Greenleaf_Whittier_Pickard.
- Coherer wikiPageWikiLink Ground_(electricity).
- Coherer wikiPageWikiLink Guglielmo_Marconi.
- Coherer wikiPageWikiLink Heinrich_Hertz.
- Coherer wikiPageWikiLink Hot_wire_barretter.
- Coherer wikiPageWikiLink Insulator_(electricity).
- Coherer wikiPageWikiLink Iron.
- Coherer wikiPageWikiLink Iron_filings.
- Coherer wikiPageWikiLink Jagadish_Chandra_Bose.
- Coherer wikiPageWikiLink John_Ambrose_Fleming.
- Coherer wikiPageWikiLink Lee_de_Forest.
- Coherer wikiPageWikiLink Lightning_arrester.
- Coherer wikiPageWikiLink Lightning_bridge.
- Coherer wikiPageWikiLink Mercury_(element).
- Coherer wikiPageWikiLink Modulation.
- Coherer wikiPageWikiLink Monterubbiano.
- Coherer wikiPageWikiLink Morse_code.
- Coherer wikiPageWikiLink Nickel.
- Coherer wikiPageWikiLink Nikola_Tesla.
- Coherer wikiPageWikiLink Oil.
- Coherer wikiPageWikiLink Oliver_Lodge.
- Coherer wikiPageWikiLink On-off_keying.
- Coherer wikiPageWikiLink Peter_Samuel_Munk.
- Coherer wikiPageWikiLink Pierre_Guitard.
- Coherer wikiPageWikiLink Quantum_tunnelling.
- Coherer wikiPageWikiLink Radio_frequency.
- Coherer wikiPageWikiLink Radio_receiver.
- Coherer wikiPageWikiLink Radio_wave.
- Coherer wikiPageWikiLink Radiotelephone.
- Coherer wikiPageWikiLink Rectifier.
- Coherer wikiPageWikiLink Reginald_Fessenden.
- Coherer wikiPageWikiLink Royal_Society.
- Coherer wikiPageWikiLink Samuel_Alfred_Varley.
- Coherer wikiPageWikiLink Silver.
- Coherer wikiPageWikiLink Sound.
- Coherer wikiPageWikiLink Spark-gap_transmitter.
- Coherer wikiPageWikiLink Telegraph_sounder.
- Coherer wikiPageWikiLink Telephone.
- Coherer wikiPageWikiLink Temistocle_Calzecchi-Onesti.
- Coherer wikiPageWikiLink Transmitter.
- Coherer wikiPageWikiLink Triode.
- Coherer wikiPageWikiLink Vacuum.
- Coherer wikiPageWikiLink Vacuum_tube.
- Coherer wikiPageWikiLink Wetting_current.
- Coherer wikiPageWikiLink Wiktionary:cohere.
- Coherer wikiPageWikiLink Wireless_telegraphy.
- Coherer wikiPageWikiLink Édouard_Branly.
- Coherer wikiPageWikiLink File:Blondel_coherer_and_Guarini_decoherer.jpg.
- Coherer wikiPageWikiLink File:Branly_coherer.png.
- Coherer wikiPageWikiLink File:Coherer.jpg.
- Coherer wikiPageWikiLink File:Marconis_Coherer_Receiver_at_Oxford_Museum_History_of_Science.jpg.
- Coherer wikiPageWikiLink File:Recepteur_tube_limaille.JPG.
- Coherer wikiPageWikiLinkText "Branley Coherer".
- Coherer wikiPageWikiLinkText "Coherer".
- Coherer wikiPageWikiLinkText "Coherer#Anticoherer".
- Coherer wikiPageWikiLinkText "Coherer#Decoherer".