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  2. Pitot tube - Wikipedia

    en.wikipedia.org/wiki/Pitot_tube

    The basic pitot tube consists of a tube pointing directly into the oncoming fluid flow. Pressure in the tube can be measured as the moving fluid cannot escape and stagnates. This pressure is the stagnation pressure of the fluid, also known as the total pressure or (particularly in aviation) the pitot pressure.

  3. 6V6 - Wikipedia

    en.wikipedia.org/wiki/6V6

    The pentode EL84/6BQ5 - 9 pin Noval base tube, that although different enough from the 6V6 not to justify rating it as an equivalent, because of its popularity and ready availability, plus having a close-enough similarity to make it possible, if bias is altered, adapters have been developed commercially to allow an amplifier designed for 6V6 ...

  4. List of vacuum tubes - Wikipedia

    en.wikipedia.org/wiki/List_of_vacuum_tubes

    For signal pentodes, an odd model number most often identified a variable-mu (remote-cutoff) tube, whereas an even number identified a 'high slope' (sharp-cutoff) tube For power pentodes and triode-pentode combinations, even numbers usually indicate linear (audio power amplifier) devices while odd numbers were more suited to video signals or ...

  5. South African Class GL 4-8-2+2-8-4 - Wikipedia

    en.wikipedia.org/wiki/South_African_Class_GL_4-8...

    It used a top feed and contained 263 small tubes of 2 inches (51 millimetres) outside diameter and 50 large tubes of 5 + 1 ⁄ 2 inches (140 millimetres) outside diameter, while the superheater elements were of 1 + 1 ⁄ 2 inches (38 millimetres) diameter. The round-topped firebox with its 75 square feet (7.0 square metres) grate area was fired ...

  6. EL84 - Wikipedia

    en.wikipedia.org/wiki/EL84

    CV2975 is the military designation (Common Tube) for EL84. [3] Other equivalent tubes are the 7189 and 7189A, [4] [5] an extended-ratings version of the tube for industrial applications, the E84L (7320), a long-life, professional version with more than 10000 hours expected lifetime, and the directly equivalent 6P14P (Cyrillic: 6П14П) produced ...

  7. 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, which was 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 ...