Vacuum tube
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In electronics, a vacuum tube, electron tube (in North America), thermionic valve, tube, or valve is a device controlling electric current through a vacuum in a sealed container. The container is often thin transparent glass in a roughly cylindrical shape. The simplest vacuum tube, the diode, is essentially an incandescent light bulb with an extra electrode inside. When the bulb's filament is heated white-hot, electrons are boiled off its surface and into the vacuum inside the bulb. If the extra electrode (also called a "plate" or "anode") is made more positive than the hot filament, a direct current flows through the vacuum to the anode (a demonstration of the Edison effect). As the current only flows in one direction, it makes it possible to convert from AC current applied to the filament to DC current.
- Related: All American Five, Battery (vacuum tube), Crookes tube, Irving Langmuir, Magic eye tube, Nixie tube, RETMA tube designation, RMA tube designation, Traveling wave tube, Tube caddy, Tube sound, Tube tester, Vacuum fluorescent display, Valve amplifier, Zetatron
| The Thermionic Detector – HJ van der Bijl (October... The Thermionic Detector – HJ van der Bijl (October 1919) books.google.co.za/.../books?id=KSkDAAAAMBAJ&pg=PA132&lpg=PA132&dq=van+der+Bijl+Thermionic+valve&source=bl&ots=JnsAins0-i&sig=MgS3Rl7nR-MHLqpYd7nydirOCpY&hl=en&ei=Q_KJTem-F5D34gb7qbjvDQ&sa=X&oi=book_result&ct=result&resnum=2&ved=0CB8Q6AEwAQ#v=onepage&q=van%20der%20Bijl%20Thermionic%20valve&f=false - Web |
| How vacuum tubes really work How vacuum tubes really work www.john-a-harper.com/tubes201/ - Web |
| The Vacuum Tube FAQ The Vacuum Tube FAQ www.ken-gilbert.com/techstuff/vtf.html - Web |
Gallery for «Vacuum tube»
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| Vacuum tubes for beginners Vacuum tubes for beginners www.atatan.com/~s-ito/vacuum/vacuum.html - Web |
| NJ7P Tube Database NJ7P Tube Database www.nj7p.org/Tube.php - Web |
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| Characteristics and datasheets Characteristics and datasheets www.classiccmp.org/rtellason/tubes.html - Web |
| Video of amateur radio operator making his own vac... Video of amateur radio operator making his own vacuum tube triodes blog.makezine.com/.../make_your_own_vaccum_tube.html - Web |
| Tuning eye tubes. Tuning eye tubes. everything2.com/title/tuning%2520eye%2520tubes - Web |
| Archive film of Mullard factory Blackburn Archive film of Mullard factory Blackburn www.techtubevalves.com/about_us/film_reels.php - Web |
| Western Electric specifications sheets for 1940s a... Western Electric specifications sheets for 1940s and 1950s electron and vacuum tubes www.westernelectric.com/support/we_spec_sheets.html - Web |
