Tabung vakum

Dalam elektronika, sebuah tabung vakum adalah sebuah alat yang biasanya digunakan untuk menguatkan sinyal. Dahulu digunakan di banyak alat-alat elektronik tapi kini tabung vakum hanya digunakan dalam aplikasi khusus. Untuk banyak tujuan, tabung vakum telah diganti oleh transistor yang murah dan jauh lebih kecil, baik sebagai alat terpisah maupun dalam sirkuit terpadu. Pada awal abad ke-21 muncul kembali kesukaan terhadap tabung vakum, kali ini dalam bentuk tabung mikro field-emitter.

Tabung vakum pertama diciptakan oleh John Ambrose Fleming pada tahun 1904.

Pranala luar dan referensi

• Shiers, George, "The First Electron Tube", SCIENTIFIC AMERICAN, March 1969, p. 104.
• Tyne, Gerald, SAGA OF THE VACUUM TUBE, PROMPT Publications, 1977 (reprint 1994), pp. 30-83.
• Stokes, John, 70 YEARS OF RADIO TUBES AND VALVES, Vestal Press, NY, 1982, pp. 3-9.
• Thrower, Keith, HISTORY OF THE BRITISH RADIO VALVE TO 1940, MMA International, 1982, pp 9-13.
• How vacuum tubes really work - John Harper's excellent website about thermionic emission and vacuum tube theory--much mathematical detail, at college level.
• http://www.tubecollector.org/ - the Virtual Valve Museum
• http://www.tubecollectors.org/ - the Tube Collectors Association
• http://www.marconicalling.com/museum/html/events/events-i=39-s=0.html - The invention of the thermionic valve
• http://www.svetlana.com/docs/tubeworks.html - Plenty of interesting information about vacuum tubes
• http://www.radau5.ch/valves.html - A lot of very interesting technical information about vacuum tubes, with PDF files from old books in both English and German, with an outstanding theoretical discussion. The difference between the American and the German techniques is interesting. The American technique usually uses the gain as central parameter in the calculation. The German technique uses the transconductance (durchgriff) as the central parameter, which is a little bit more abstract but since the transconductance is the most constant of all the parameters of the tube, it makes calculations more predictable and more precise.
• http://www.milbert.com/tstxt.htm - AES paper on audible differences in sound quality between vacuum tubes and transistors.
• http://www.candescent.com - firm researching construction of flat-panel displays using nanoscale field-emitter vacuum tube technology.
• http://www.cpii.com/eimac/catalog/169218.htm - data sheet for the giant 8974 power tube.
• Vacuum tube technical (tubular elements of solar panels for heating water)