high-vacuum tube

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• Vacuum tube — Vacuum Vac u*um, n.; pl. E. {Vacuums}, L. {Vacua}. [L., fr. vacuus empty. See {Vacuous}.] 1. (Physics) A space entirely devoid of matter (called also, by way of distinction, absolute vacuum); hence, in a more general sense, a space, as the… …   The Collaborative International Dictionary of English

• vacuum tube — n an electronic device in which conduction by electrons takes place through a vacuum within a sealed glass or metal container and which has various uses based on the controlled flow of electrons * * * a glass tube from which the air has been… …   Medical dictionary

• 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

• vacuum tube — 1. Also called, esp. Brit., vacuum valve. an electron tube from which almost all air or gas has been evacuated: formerly used extensively in radio and electronics. 2. a sealed glass tube with electrodes and a partial vacuum or a highly rarefied… …   Universalium

• vacuum-tube rectifier — kenotroninis lygintuvas statusas T sritis fizika atitikmenys: angl. electronic rectifier; high vacuum rectifier; vacuum tube rectifier vok. Elektronengleichrichter, m rus. кенотронный выпрямитель, m pranc. redresseur à vide poussé, m …   Fizikos terminų žodynas

• vacuum-tube voltmeter — noun : a voltmeter employing vacuum tubes and useful because of its very high input impedence for measurements in circuits (as vacuum tube circuits) from which only very small currents can be drawn without altering the voltages being measured …   Useful english dictionary

• high-vacuum rectifier — kenotroninis lygintuvas statusas T sritis fizika atitikmenys: angl. electronic rectifier; high vacuum rectifier; vacuum tube rectifier vok. Elektronengleichrichter, m rus. кенотронный выпрямитель, m pranc. redresseur à vide poussé, m …   Fizikos terminų žodynas

• Battery (vacuum tube) — In electronics, vacuum tubes were traditionally powered by batteries. Each battery had a different designation depending on which vacuum tube element it was associated with.Initially, the only such device was a diode with only a filament… …   Wikipedia

• 845 (vacuum tube) — The 845 power triode is a radio transmitting vacuum tube which can also be used as an audio amplifier and modulation tube. Typically, the plate is machined from solid graphite in order to accommodate extremely high current dissipation (up to 100… …   Wikipedia

• vacuum tube — noun Date: 1859 an electron tube evacuated to a high degree of vacuum …   New Collegiate Dictionary

• Ultra high vacuum — (UHV) is the vacuum regime characterised by pressures lower than about 10−7 pascal or 100 nanopascals ( 10−9 torr). UHV requires the use of special materials in creating the vacuum system, extreme cleanliness to maintain the vacuum system, and… …   Wikipedia