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  2. Sylvania Electric Products - Wikipedia

    en.wikipedia.org/wiki/Sylvania_Electric_Products

    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.

  3. Cathode-ray tube - Wikipedia

    en.wikipedia.org/wiki/Cathode-ray_tube

    The only visible differences are the single electron gun, the uniform white phosphor coating, and the lack of a shadow mask. A cathode-ray tube ( CRT) is a vacuum tube containing one or more electron guns, which emit electron beams that are manipulated to display images on a phosphorescent screen. [ 2 ]

  4. Tube socket - Wikipedia

    en.wikipedia.org/wiki/Tube_socket

    An early transistor socket and an integrated circuit socket are included for comparison. Tube sockets are electrical sockets into which vacuum tubes (electronic valves) can be plugged, holding them in place and providing terminals, which can be soldered into the circuit, for each of the pins. Sockets are designed to allow tubes to be inserted ...

  5. List of vacuum tubes - Wikipedia

    en.wikipedia.org/wiki/List_of_vacuum_tubes

    YD1336 – 1.8 kW, Air-cooled, UHF power triode. YD1342 – 30 MHz, 530 kW, Water-cooled RF power triode. YD1352S (8867, DX334) – 5 MHz, 2 kW, Water-cooled Neotron, a gridless field-effect tube where a magnetically focused electron beam is modulated by varying the voltage of a gate electrode surrounding it.

  6. EL34 - Wikipedia

    en.wikipedia.org/wiki/EL34

    The EL34 is a thermionic vacuum tube of the power pentode type. The EL34 was introduced in 1955 by Mullard, who were owned by Philips. [1] The EL34 has an octal base (indicated by the '3' in the part number) and is found mainly in the final output stages of audio amplification circuits; it was also designed to be suitable as a series regulator by virtue of its high permissible voltage between ...

  7. Zinsco - Wikipedia

    en.wikipedia.org/wiki/Zinsco

    Almost immediately, Zinsco began development of new panel and circuit breaker designs, with patent applications dating back to 1946. The first Zinsco panels contained copper bus-bars and copper breaker clips. Original breakers were patented in 1950 and labeled “Magnatrip.”. Five additional patents would be issued for subsequent designs.

  8. Tube tester - Wikipedia

    en.wikipedia.org/wiki/Tube_tester

    Tube tester. A tube tester is an electronic instrument designed to test certain characteristics of vacuum tubes (thermionic valves). Tube testers evolved along with the vacuum tube to satisfy the demands of the time, and their evolution ended with the tube era. The first tube testers were simple units designed for specific tubes to be used in ...

  9. Interchangeable parts - Wikipedia

    en.wikipedia.org/wiki/Interchangeable_parts

    Interchangeable parts. Ford would often use interchangeable parts between car models to save costs, but slowly decreased after it lost market share to Chevrolet. Interchangeable parts are parts ( components) that are identical for practical purposes. They are made to specifications that ensure that they are so nearly identical that they will ...

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