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	John R. Pierce / Electron Tubes
		If we regard the motion of electrons as governed by the electric (and magnetic) fields in which they move, and disregard interactions of one electron on others, this applies to electrons in vacuum tubes, and the coordinates are the three position coordinates and the three velocity coordinates.
		These were electron flow between an infinite parallel plane cathode and an infinite parallel plane anode, flow between a cylindrical cathode and a central cylindrical anode, and flow between a spherical cathode and a central spherical anode.
		One was that of focusing the electron beam.
	www.smecc.org /john_r__pierce____electron_tubes.htm (7432 words)

	Brainboost - what are electron tubes and what do they do (Site not responding. Last check: )
		Also Referred to as Electron Tubes - Timeline A vacuum tube also called a electron tubes is a sealed glass or metal - ceramic enclosure used in electronic circuitry to control the flow of electrons between the metal electrodes sealed inside the tubes.
		Vacuum Tubes The conduction of electricity in thin gases in vacuum tubes was the key to the discovery of the electron in 1897.
		Vacuum tubes were critical devices in electronics technology, leading to the development and commercialization of such technologies as radio broadcasting, television, radar, high fidelity sound reproduction, telephone, analog and digital computers, and industrial process control.
	www.brainboost.com /search.asp?Q=what+are+electron+tubes+and+what+do+they+do&lfmq=1 (240 words)

	electron tube — FactMonster.com
		electron tube, device consisting of a sealed enclosure in which electrons flow between electrodes separated either by a vacuum (in a vacuum tube) or by an ionized gas at low pressure (in a gas tube).
		The two principal electrodes of an electron tube are the cathode and the anode or plate.
		In some gas tubes the cathode is not designed as an electron emitter; conduction occurs when a voltage sufficient to ionize the gas exists between the anode and the cathode.
	www.factmonster.com /ce6/sci/A0817013.html (409 words)

	Lessons In Electric Circuits -- Volume III (Semiconductors) - Chapter 13
		The semiconductor counterpart to the tube, of course, is the transistor.
		Transistors perform much the same function as tubes: controlling the flow of electrons in a circuit by means of another flow of electrons in the case of the bipolar transistor, and controlling the flow of electrons by means of a voltage in the case of the field-effect transistor.
		Electrons emitted by the cathode of this tube impinge on a fluorescent screen, causing the green-colored light to be emitted.
	www.ibiblio.org /obp/electricCircuits/Semi/SEMI_13.html (7356 words)

	Tubes Versus Semiconductors - Electron Tubes
		Tubes, being less complex in their manufacture than semiconductor components, are potentially cheaper to produce as well, although the huge volume of semiconductor device production in the world greatly offsets this theoretical advantage.
		However, with tubes it is easy to design a stable class A audio amplifier circuit because tubes are not as adversely affected by the changes in temperature experienced in a such a power-inefficient circuit configuration.
		For this and other reasons, electron tubes will never be "obsolete," but will continue to serve in niche roles, and to foster innovation for those electronics engineers, inventors, and hobbyists who are unwilling to let their minds by stifled by convention.
	www.opamp-electronics.com /tutorials/tubes_versus_semiconductors_3_13_12.htm (1442 words)

	IEEEVM: Electron Tubes
		An electron tube (also known as a vacuum tube) is a glass enclosure in which electrons move through vacuum or gas from one metal electrode to another.
		A more versatile type of electron tube is the triode, or three-element tube, invented by Lee De Forest in 1906 (his brand name for it was the Audion, but it came to be known as the triode).
		The electron tube was the basis of virtually all electronic devices from the early 1900s until the introduction of the transistor in the late 1940s.
	www.ieee-virtual-museum.org /collection/tech.php?taid=&id=2345819&lid=1 (1032 words)

	Electron Tubes
		A wide variety of electron tubes have used radioactive material: voltage regulators, spark-gap tubes, voltage sensitive switching tubes, glow lamps, etc. In general, such tubes consist of a glass envelope, a fill gas, a radioactive source, an anode and an unheated (cold) cathode.
		It was also assumed that the average distance to one tube was 1 meter, the average distance to two tubes was 3 meters and the average distance to the remaining two tubes was 6 meters.
		For purposes of this paragraph ‘‘electron tubes’’ include spark gap tubes, power tubes, gas tubes including glow lamps, receiving tubes, microwave tubes, indicator tubes, pickup tubes, radiation detection tubes, and any other completely sealed tube that is designed to conduct or control electrical currents.
	www.orau.org /PTP/collection/consumer%20products/electrontubes.htm (974 words)

	Tubes 201 - How Vacuum Tubes Really Work
		This sea of electrons is common to all metals, and indeed is really the defining characteristic of a metal and explains many of their familiar properties such as electrical conductivity and the fact that they are shiny.
		Tube gassiness is measured, in tube testers, by measuring this small current (typically a few nA), which is in direct proportion to the amount of gas in the tube.
		When the screen grid voltage is higher than the plate, electrons emitted from the plate by secondary emission, as it is struck by the energetic primary electrons, are attracted back to the screen grid instead of returning to the plate as occurs in a triode.
	www.john-a-harper.com /tubes201 (10896 words)

	electron tubes privacy statement
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		Electron Tubes does not control those sites or their privacy practices, which may differ from Electron Tubes’.
		Some third-party companies may choose to share their personal data with Electron Tubes; that sharing is governed by that third-party company’s privacy policy.
	www.electrontubes.com /info/privacy.html (728 words)

	Glossary : SLAC Virtual Visitor Center
		An electron in a atom is bound because of its electrical attraction to the nucleus, which makes the mass of the atom slightly less than the sum of the masses of the electron plus the rest of the atom without that electron.
		Electrons carry electrical current and successful manipulation of electrons allows electronic devices, such as the one you are using, to function.
		These energy changes are either in the electron orbital shells that surround an atom or are due to the slowing down (i.e., interaction) of electrons in matter, such as a "target" in an x-ray machine.
	www2.slac.stanford.edu /vvc/glossary.html (5645 words)

	Vacuum Tubes, Inc. Homepage, Electron Tubes
		All used tubes are tested on a transconductance tester.
		We are the exclusive distributor of new manufacture sockets for the 304TL family of tubes.
		Power output tubes are matched for plate current and transconductance (within 5% for both parameters).
	www.vacuumtubesinc.com (644 words)

	Electron Tubes Electronic Tube Design Klystrons Thermionic Cathode - E Beam, Inc
		Electron Guns: generate, form and shape the electron beam prior to its use.
		They are used in streak tubes, where very fast signals are to be imposed on the electron beam.
		Standard Test Vehicle: a standardized glass electron tube that is inexpensive to build that can be constructed in large quantities so as to generate statistically useful performance data.
	www.ebeaminc.com /capabilities.htm (1743 words)

	Electron tubes - Principle of operation
		The electron flow emitting from the filament or cathode is, except for the diode, controlled in some way by means of electrodes with varying potentials in order to attenuate or accelerate the flow of electrons.
		The electrons are collected at the anode which usually carries the highest potential with respect to the cathode.
		Although the electrons flow from the cathode to the anode, it is generally accepted that current flows from the anode to the cathode.
	www.akh.se /tubes/princop.htm (524 words)

	Electron Tubes - Toshiba America Electronic Components, Inc.
		Electron Tubes - Toshiba America Electronic Components, Inc.
		Toshiba America Electronic Components, Inc. (TAEC) offers Magnetron Tubes for residential and commercial Microwave ovens as well as imaging system components for a variety of medical, dental and industrial applications.
		This product line includes x-ray tubes, a variety of image intensifiers (from 4- to 16-inches), optical units (lens, adapter and cover) and CCD cameras with up to 1K x 1K image resolution.
	www.toshiba.com /taec/Catalog/Family.do?familyid=10 (141 words)

	electron tubes terms and conditions
		Electron Tubes does not accept liability for any direct, indirect, special, consequential or other losses or damages of whatsoever kind arising out of access to, or the use of this website or any information contained in it.
		The copyright in the contents of and any downloads from this website is owned by Electron Tubes unless otherwise stated.
		Such a hyperlink does not signify that Electron Tubes have reviewed or approve of the connected third party's website or its contents - indeed in certain instances a hyperlink may connect you to a third party's website containing views contradictory to those expressed on our website or otherwise held by Electron Tubes.
	www.electron-tubes.co.uk /info/tsandcs.html (469 words)

	Historic Electron Tubes
		At the beginning of the 1950’s when most of the U/V modules were developed, electron tubes were the industry standard in the western world; western Germany alone made over 10 million a year.
		Most of the EF804 tubes were used by companies like Grundig and AEG for tapemachines, where-as the EF804S was mainly used for specialty electronics where the best possible S/N ratio with low microphonics was needed.
		There is also the family of tubes that the EF804(s) belongs to; as mentioned before, despite the different pin layout, the EF804 is extremely similar to the EF40 and EF86.
	www.tab-funkenwerk.com /id25.html (999 words)

	Electron Tubes
		X Ray Tubes TOP The meedical use and the electron tube for industry corresponding to a uses such as a Toshiba Electron Tubes and Devices Co. Ltd.
		electron tube deviice consisting of a sealed enclosure in which electrons flow molecles constitute the current.
		Operating sinceas an independent and non X Ray Tubes TOP The meidcal use and the electron tube for industry corresponding to usses such as a Toshiba Electron Tubes and Devices Co. Ltd.
	tbbs.corluge.com /electron-tubes.html (436 words)

	Electron Tubes - Elderly Instruments
		This is the same tube Eddie Van Halen used in his Marshalls to achieve the infamous "Brown Sound", this..more...
		This tube is very compact and is the only modern power tube that will fit in many older amps.
		New from Groove Tubes the GT6L6CHP is a heavy duty 6L6 reminiscent of the old RCA fl plate tubes of the 50's.
	www.elderly.com /accessories/cats/EATB.html (580 words)

	Technikum29 - Calculators with electron tubes
		The development of electronic calculators since the 1950s is at least as interesting as the development of broadcast engineering in the 1920/30s.
		The first electronic desk calculator in the world (1962) is a real milestone.
		The modern-looking monster features 190 electron tubes and belongs consequently to the first generation of calculators.
	www.technikum29.de /en/computer/electron-tubes.shtm (153 words)

	The Book Pl@ce: Title Detail (Site not responding. Last check: )
		During this period, the development of electron tubes created the so called "Electroni Age".
		Electron tubes played the leading role in the electronic equipments until the middle of the 1950s when solid state devices such as transistors and integrated circuits replaced electron tubes in various applications and accelerated the electronic age.
		This is a collection of data and memories about the research, development and production of electron tubes in Japan, contributed by some of the scientists and engineers engaged in their development.
	www.bookends.co.uk /bookplace/display.asp?K=180358524307000&aub=Seizo&m=6&dc=9 (120 words)

	electron tubes aircraft aerospace component repair and overhaul fokker f27 aviation aero (Site not responding. Last check: )
		electron tubes aircraft aerospace and component repair and overhaul fokker f27 aviation aero
		Come get new electron tubes aircraft aerospace or component repair and overhaul fokker f27 aviation aero in the us or globally while maybe looking at similar catering disposables aircraft aerospace and gases aviation aero proposals.
		Can electron tubes aircraft aerospace or component repair and overhaul fokker f27 aviation aero or even infrared sensors aviation aero be obtained with ease?
	www.contact-aero.co.uk /electron-tubes-aircraft-aerospace.htm (153 words)

	Exhibitor Detail - Online Exhibition - SPIE Web
		Electron Tubes designs, develops and manufactures photomultipliers, other light and radiation sensing devices and accessories.
		Electron Tubes HVSys is a remotely controlled, multi-channel, photomultiplier power supply system with individual channel control and high voltage power supply monitoring.
		Electron Tubes light detector modules have been customised for many applications from pollution monitoring to radiation detection.
	www.spie.org /app/exhibition/index.cfm?fuseaction=exhibitordetail&exhibitor_id=11793&meeting_id=93&CFID=33560129&CFTOKEN=12686359 (590 words)

	Which Journal Would Be Right for My Research?
		IEEE Electron Device Letters was one of the most-cited journals, ranking number ten in electrical and electronics engineering in 2003, according to the annual Journal Citation Report (2003 edition) published by the Institute for Scientific Information.
		Included are power electronics and drive control techniques, system control and signal processing, fault detection and diagnosis, power systems, instrumentation, measurement and testing, modeling and simulation, motion control, robotics, sensors and actuators, implementation of neural nets, fuzzy logic, and artificial intelligence in industrial systems, factory automation,communication, and computer networks.
		The science of developing and using electrical and electronic instruments for the purpose of measuring, monitoring or recording various physical phenomena that may or may not be of an electrical nature.
	www.ieee.org /organizations/pubs/transactions/stylesheets.htm (6309 words)

	Vacuum Tubes & Vacuum Capacitors
		GREENSTONE USA is fast becoming the leader in the Vacuum Tubes, Vacuum Capacitor and Vacuum Interrupters industry.
		Our research and development program has allowed us to stay one step ahead of the competition by manufacturing quality Vacuum Tubes, Vacuum Capacitors and Vacuum Interrupters that are beyond compare for the last 25 years.
		Eastern time, which in turn guarantees next day delivery of your order and we also guarantee the lowest prices on all our Vacuum Tubes, Vacuum Capacitors and Vacuum Interrupters.
	www.electrontubes.net (152 words)

	tubes : Manufacturers: Tubes & Semiconductors
		Electron Tube Enterprises - Electron Tube Enterprises provides receiving and light Tx tubes for the Antique Radio collectors and ham operators.
		Electron Tubes & capacitors - Manufacturer & distributor of Vacuum tubes and vacuum capacitors.
		International Components - International Components Corporation has an extensive range of electronic components consisting of audible signal devices, speakers, microphones, capacitors, electron tubes, connectors, and accessories designed in recognition of the diversity of applications and special characteristics encountered by designers in today's complex world.
	www.dxzone.com /catalog/Manufacturers/Tubes___Semiconductors/index.shtml (405 words)

	Radio Electron Tubes
		Richardson Electronics is a specialized international distributor of electron tubes, radio frequency (RF) and microwave components, power...
		Interested in the use, history, and preservation of electron tubes and electron tube technology.
		Radio Tube Supply is a Major Supplier, of electron tubes for the commercial and hobbyist communities.
	www.info-storm.com /directory/r/Radio_Electron_Tubes/index.shtml (307 words)

	electron tube — Infoplease.com
		X-Ray tube operated with a carbon nanotube electron beam.(developed at Nagoya Institute of Technology in Japan)(Brief Article)
		Full shopping trolley: like electrons striking a photomultiplier tube, ICs, semiconductor switches, single-chip graphics controllers,......
		Electron microscopy for rapid diagnosis of infectious agents in emergent situations (1).
	www.infoplease.com /ce6/sci/A0817013.html (490 words)

	Transmitting electron tubes, new and used, lowest prices! (Site not responding. Last check: )
		While the tubes we have in stock look like new or almost like new, they were in fact removed from retired industrial equipment, which appeared to have had very little (or no) use.
		While we do not have the ability to test these tubes, your satisfaction is absolutely guaranteed, and backed up with a 30 day refund or exchange privilege, less only shipping and handling charges.
		Most tubes are good pulls, and all are guaranteed to your satisfaction.
	www.mgs4u.com /transmit.htm (499 words)

	Exhibitor Detail - Online Exhibition - SPIE Web
		Electron Tubes has developed a very compact detector module based on the new D950, 12mm (1/2”) bialkali, photomultiplier.
		Electron Tubes has developed a miniature, 12 mm (1/2") bialkali, photomultiplier.
		Applications involving the measurement of fast transients or photon counting with instruments where space is at a premium, will welcome this new addition to our range.
	www.spie.org /app/exhibition/index.cfm?fuseaction=exhibitordetail&exhibitor_id=7020&meeting_id=57&CFID=33719662&CFTOKEN=84238870 (320 words)

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