Gourt > Science > Technology > Electronics > Reference > Vacuum Tubes (1)
In electronics, a vacuum tube (U.S. and Canadian English) or (thermionic) valve (outside North America) is a device generally used to amplify, or otherwise modify, a signal by controlling the movement of electrons in an evacuated space. For most purposes, the vacuum tube has been replaced by the much smaller and less expensive transistor, either as a discrete device or in an integrated circuit. However, tubes are still used in several specialised applications such as audio systems and high power RF transmitters, as a display device in television sets, and to generate microwaves in microwave ovens.
The vacuum tube is a voltage-controlled device, which means that the relationship between the input and output circuits is determined by a transconductance function. The solid-state device most closely analogous to the vacuum tube is the JFET. However, the vacuum tube typically operates at far higher voltage (and power) levels than the JFET.
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EETimes.com - Nano vacuum tubes could make better batteries, or memories: http://bit.ly/5vOqRB via @addthis
entretech (EntreTech Forum) Fri, 01 Jan 2010 18:00:04 -0000
EETimes.com - Nano vacuum tubes could make better batteries, or memories: http://bit.ly/5vOqRB via @addthis
att'n @EtotheZ vacuum tubes were once integral to NY life, transporting letters, packages and at least one live cat http://bit.ly/8BS2IU
blazingbetta (Sarah Multiverse ) Fri, 01 Jan 2010 06:05:37 -0000
att'n @EtotheZ vacuum tubes were once integral to NY life, transporting letters, packages and at least one live cat http://bit.ly/8BS2IU
Finally listing NOS vacuum tubes on the inventory. http://www.hifitubes.org/inventory.pdf
hifitubes_org (Jon Catuccio) Thu, 31 Dec 2009 14:36:05 -0000
Finally listing NOS vacuum tubes on the inventory. http://www.hifitubes.org/inventory.pdf
More China Companies Are Going Green: A worker produces solar vacuum tubes at a Himin factory in Dezhou, China. The company's chairma..
cmolejo (cmolejo) Thu, 31 Dec 2009 08:15:36 -0000
More China Companies Are Going Green: A worker produces solar vacuum tubes at a Himin factory in Dezhou, China. The company's chairma..
They don't have those in Canada? Lucky! RT @xpaulx: I just don't get the whole vacuum tubes at American banks thing
PunkDrummerGirl (Dona Lynne) Wed, 30 Dec 2009 02:40:19 -0000
They don't have those in Canada? Lucky! RT @xpaulx: I just don't get the whole vacuum tubes at American banks thing
Breathe Jeff Breathe! Your 1940s era virtually irreplaceable amplifier vacuum tubes are not fried after all. #geekagony
mthrsuperior (Jeff) Wed, 30 Dec 2009 01:32:28 -0000
Breathe Jeff Breathe! Your 1940s era virtually irreplaceable amplifier vacuum tubes are not fried after all. #geekagony
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Åke's Tube data - Very extensive list of various types of tube information including electronics humor section.
Cathode Corner - A scope clock, and tiny scope museum. The Scope Clock kit may be purchased.
Clocks with Nixietubes - Various types of time keeping devices made with Nixie tubes and Nixie tube like componenets.
Dr. Tube - Tube amp schematics, tube datasheets and other tube related technical info.
Meta Description: [ Dr.Tube. The specialist in the repair and modification of tube amps. Sale of tubes and components. ]
Duncan's Amp Pages - Internet resource for vacuum tubes.A data sheet data base for tubes. SPICE models for vacuum tubes, and software available for download.
Meta Description: [ Duncan's Amp Pages - Internet resource for guitar amps and vacuum tubes ]
Eimac's - Care and feeding of power grid tubes. A lot of information on beam power tubes also.
Frank Philipse - Vacuum tube, vintage radio and electronics information. Extensive listings of tube data sheets.
Frank's Electron tube Pages - Data sheets, search, history, tube bases, and numbering systems, substitution list and an extensive link list. All you would need to know about vacuum tubes.
Glowbugs - Some excellent theory, vacuum tube circuits, manuals, intersting stories and information.
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Heathkit Links - Quite a few good links to tube parts sources.
JMH's Virtual Valve Museum - An extensive collection of pictures and information of old, unusual and unique vacuum tubes.
Meta Description: [ JMH's Virtual Valve Museum ]
Mike's Electric Stuff - Antique glass and vacuum stuff, for electronics and high voltage.
RadioPistoia By Pierluigi - Audio tube amplifier project. European tube number guide. Links to other tube sites.
Meta Description: [ Benvenuti su Radiopistoia - Radiocorriere. Sito interamente dedicato alle radio a valvole e altro. Welcome on Radiopistoia-Radiocorriere Here you can find info about old vacuum tubes radios and other ]
Rf Power EXchange - RF power tubes and transistors, large inventory.
Meta Description: [ For economical and reliable solutions to all your broadcast and industrial requirements including RF transistors, Microwave Semiconductors, Power semiconductors, electrons tubes, Vacuum Capacitors, RF Connectors and more... ]
Russian/Soviet - Tube factories and their logos.
Shortwave Transmitter Tubes - A service from TDP with links to and information about the manufacturers, rebuilders and distributors/suppliers of tubes. An extensive list of data sheet sources.
Meta Description: [ Guide to the different types of tubes used in shortwave radio broadcast transmitters with links to and information about the manufacturers, rebuilders and distributors/suppliers of tubes used in shortwave radio broadcast transmitters. ]
Svetlana Applications Notes - Application notes on the care and feeding of Svetlana tubes, mostly for high power service.
TechInfo_2 - Vacuum tube equations, design and technical information.
The invention of the vacuum tube - In 1879, the legendary American inventor Thomas Edison publicly exhibited his incandescent electric light bulb for the first time. This led to the invention of the vacuum tube.
Meta Description: [ In 1879, the legendary American inventor Thomas Alva Edison
publicly exhibited his incandescent electric light bulb for the first time. ]
The Tube CAD Journal - A monthly webzine devoted to vacuum tube circuit design and understanding.
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The Tubes and Valves Online Database - European electron tube charts with characteristic data, basing diagrams, and application info, includes Russian types.
Meta Description: [ Röhrentabellen - Die Online-Datenbank zu Elektronenröhren, Tube Charts - The Tubes and Valves Online Database ]
Triode Electronics - Tubes and parts for Hi-Fi, Radio and Guitar. Tube data and amp schematics online, links to tube amp information on the web
Meta Description: [ Tubes and Parts for Hi-Fi,Radio,Guitar,etc...Tube data & amp schematics online...links to Tube Amp info on the web ]
Tube Collectors Association - A great resource for tube theory and operation. Quite a bit of history also.
Tube Datasheet Database - Datasheets for about 3,000 vacuum tubes.
Tube Rebuilders - Technical data, theory, trouble shooting information for high power tubes.
Meta Description: [ ECONCO has been rebuilding vacuum tubes for more than 30 years. Our commitment to quality, and concern for the environment has won us the acclaim of clients worldwide. ]
Vacuum tube FAQ - How to use them and how they work. List of tubes and what they are used for.
Vacuum Tube FAQ - How to use them and how they work. One of the more accurate vacuum tube FAQs on the net.
Vacuum Tube Index - Vacuum tube resources for students and more advanced users.Everything from fundamental techniques to SPICE simulation.
Meta Description: [ Vacuum tube resources for students and more advanced users.Everything from fundamental techniques to SPICE simulation. ]
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Vacuum tube links - A long list mostly audio stuff. Links to substitution guides, data sheet sites.
Vacuum Tube Valley - All about vacuum tubes. Tube audio amp kits.
Vacuum Tubes - N9TEW is supplier of vacuum tubes for ham, audio and antique radio purposes.
Meta Description: [ N9TEW is supplier of vacuum tubes for ham,audio & antique radio purposes. ]
Vintage H.H. Scott Hi-Fi Stereo Archive - This site promotes open sharing of information, understanding and historic appreciation of vintage H.H. Scott (vacuum tube) consumer high fidelity audio products produced from 1946 through 1966.
Meta Description: [ HHScott reference for fans of vintage vacuum tube Scott consumer hi-if components from 1946 to 1966. Scott Stereomaster products include tuners, amplifers, speakers. ]
World Tube Audio Portal - Audio tube related link list, forums and newsgroups, tube amplifier collection and tweaking. Audio amplifiers that use tubes. Tube replacement list included.
Meta Description: [ Here is the biggest tube audio related link list of the world plus forums and newsgroups, tube amplifier collection, tweaking, DIY, Tube Audio Sound Research, many detailed pic's ]
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