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  2. All American Five - Wikipedia

    en.wikipedia.org/wiki/All_American_Five

    The term All American Five (abbreviated AA5) is a colloquial name for mass-produced, superheterodyne radio receivers that used five vacuum tubes in their design. These radio sets were designed to receive amplitude modulation (AM) broadcasts in the medium wave band, and were manufactured in the United States from the mid-1930s until the early 1960s.

  3. Tube socket - Wikipedia

    en.wikipedia.org/wiki/Tube_socket

    The earliest tubes, like the Deforest Spherical Audion [3] from c. 1911, used the typical light bulb Edison socket for the heater, and flying leads for the other elements. Other tubes directly used flying leads for all of their contacts, like the Cunningham AudioTron from 1915, [4] or the Deforest Oscillion. [5]

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  5. Piping and plumbing fitting - Wikipedia

    en.wikipedia.org/wiki/Piping_and_plumbing_fitting

    A fitting or adapter is used in pipe systems to connect sections of pipe (designated by nominal size, with greater tolerances of variance) or tube (designated by actual size, with lower tolerance for variance), adapt to different sizes or shapes, and for other purposes such as regulating (or measuring) fluid flow.

  6. Optical fiber connector - Wikipedia

    en.wikipedia.org/wiki/Optical_fiber_connector

    2.5 mm ABS1379 PC or UPC ESCON: Enterprise Systems Connection Latch, integral shroud [1] — 2.5 mm IBM mainframe computers and peripherals F07 2.5 mm Japanese Industrial Standard (JIS) LAN, audio systems; for 200 μm fibers, simple field termination possible, mates with ST connectors F-3000 Latch, integral light- and dust-cap — 1.25 mm IEC ...

  7. KT88 - Wikipedia

    en.wikipedia.org/wiki/KT88

    The transmitting tubes TT21 and TT22 have almost identical transfer characteristics to KT88 but a different pinout, and by virtue of their anode being connected to the top cap have a higher plate voltage rating (1.25 kilovolt) and a higher power output capability of 200 watts in class AB1 push–pull.