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cathode base

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  • Cathode — Sur les autres projets Wikimedia : « Cathode », sur le Wiktionnaire (dictionnaire universel) La cathode[1] d un appareil passif parcouru par un courant continu est l électrode d où, en courant conventionnel, sort le courant (en… …   Wikipédia en Français

  • Hot cathode — is also a name for a hot filament ionization gauge, a vacuum measuring device.In vacuum tubes, a hot cathode is a cathode electrode which emits electrons due to thermionic emission. ( Cf. cold cathodes, where field emission is used and which do… …   Wikipedia

  • Hanscom Air Force Base — For the civil airport use of this facility, see Hanscom Field Infobox Airport name = Hanscom Field Hanscom Air Force Base nativename = Part of Air Force Materiel Command (AFMC) image width = 300 caption = Hanscom AFB 29 March 1995 IATA = BED ICAO …   Wikipedia

  • time base — The fundamental trace on a cathode ray tube providing the time scale against which measurements are made. Plan position indicator (radar display) …   Aviation dictionary

  • nickel processing — Introduction       preparation of the metal for use in various products.       Although it is best known for its use in coinage, nickel (Ni) has become much more important for its many industrial applications, which owe their importance to a… …   Universalium

  • Électrode négative — Cathode Voir « cathode » sur le Wiktionnaire …   Wikipédia en Français

  • List of vacuum tubes — This is a list of vacuum tubes or thermionic valves. Before the advent of semiconductor devices, hundreds of tube types were used in consumer and industrial electronics; today only a few types are still used in specialized applications. Contents… …   Wikipedia

  • Vacuum tube — This article is about the electronic device. For experiments in an evacuated pipe, see free fall. For the transport system, see pneumatic tube. Modern vacuum tubes, mostly miniature style In electronics, a vacuum tube, electron tube (in North… …   Wikipedia

  • electronics — /i lek tron iks, ee lek /, n. (used with a sing. v.) the science dealing with the development and application of devices and systems involving the flow of electrons in a vacuum, in gaseous media, and in semiconductors. [1905 10; see ELECTRONIC,… …   Universalium

  • Récepteur à cristal — Pour les articles homonymes, voir Poste (homonymie). Poste à pyrite utilisé durant la Première Guerre mondiale 1914 1918 …   Wikipédia en Français

  • MÉTALLURGIE - Métallurgie extractive — Le caractère dominant de la métallurgie extractive moderne est que tout métal, quel qu’il soit, peut, pour répondre à un besoin nouveau, devenir un métal industriel. La comparaison des métallurgies particulières fait ressortir des différences… …   Encyclopédie Universelle

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