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  2. List of vacuum tubes - Wikipedia

    en.wikipedia.org/wiki/List_of_vacuum_tubes

    This is a list of vacuum tubes or thermionic valves, and low-pressure gas-filled tubes, or discharge tubes. Before the advent of semiconductor devices, thousands of tube types were used in consumer electronics. Many industrial, military or otherwise professional tubes were also produced.

  3. List of Mullard–Philips vacuum tubes - Wikipedia

    en.wikipedia.org/wiki/List_of_Mullard–Philips...

    Most post-war European thermionic valve (vacuum tube) manufacturers have used the Mullard–Philips tube designation naming scheme. Special quality variants may have the letter "S" appended, or the device description letters may be swapped with the numerals (e.g. an E82CC is a special quality version of an ECC82)

  4. Vacuum tube - Wikipedia

    en.wikipedia.org/wiki/Vacuum_tube

    Later thermionic vacuum tubes, mostly miniature style, some with top cap connections for higher voltages. A vacuum tube, electron tube, [1] [2] [3] valve (British usage), or tube (North America) [4] is a device that controls electric current flow in a high vacuum between electrodes to which an electric potential difference has been applied.

  5. RETMA tube designation - Wikipedia

    en.wikipedia.org/wiki/RETMA_tube_designation

    The Radio Electronics Television Manufacturers' Association was formed in 1953, as a result of mergers with other trade standards organisations, such as the RMA.It was principally responsible for the standardised nomenclature for American vacuum tubes - however the standard itself had already been in use for a long time before 1953; for example, the 6L6 was introduced in July 1936.

  6. RMA tube designation - Wikipedia

    en.wikipedia.org/wiki/RMA_tube_designation

    S-- Vacuum switches; T Storage, radial beam, and deflection control tubes (no known examples assigned) V-- Flash tubes; W-- Travelling wave tube; X-- X-ray tube; Y-- Thermionic converter; The last 2 digits were serially assigned, beginning with 21 to avoid possible confusion with receiving tubes or CRT phosphor designations.

  7. Category:Vacuum tubes - Wikipedia

    en.wikipedia.org/wiki/Category:Vacuum_tubes

    Neon lighting (1 C, 21 P) V. Vacuum tube displays (1 C, 29 P) Valve amplifiers (31 P) Pages in category "Vacuum tubes" The following 160 pages are in this category ...

  8. AC/DC receiver design - Wikipedia

    en.wikipedia.org/wiki/AC/DC_receiver_design

    Vacuum tube equipment used a number of tubes, each with a heater requiring a certain amount of electrical power. In AC/DC equipment, the heaters of all the tubes are connected in series . All the tubes are rated at the same current (typically 100, 150, 300, or 450 mA ) but at different voltages, according to their heating power requirements.

  9. Sylvania Electric Products - Wikipedia

    en.wikipedia.org/wiki/Sylvania_Electric_Products

    Sylvania Electric Products Inc. was an American manufacturer of diverse electrical equipment, including at various times radio transceivers, vacuum tubes, semiconductors, and mainframe computers such as MOBIDIC. They were one of the companies involved in the development of the COBOL programming language.

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