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  2. Tube socket - Wikipedia

    en.wikipedia.org/wiki/Tube_socket

    When tube equipment was common, retailers such as drug stores had vacuum tube testers, and sold replacement tubes. Some Nixie tubes were also designed to use sockets. Throughout the tube era, as technology developed, sometimes differently in different parts of the world, many tube bases and sockets came into use.

  3. 6V6 - Wikipedia

    en.wikipedia.org/wiki/6V6

    These tubes have very similar characteristics to the 6V6, but differ either in the heater rating, or use a different socket and pin-out 5V6GT - Same as the 6V6GT, but with different heater ratings - 4.7V, 0.6A, controlled 11 sec. warm-up time.

  4. List of vacuum tubes - Wikipedia

    en.wikipedia.org/wiki/List_of_vacuum_tubes

    For transmitting tubes in this system, the second element starts with a dash, a sequentially assigned number, then an optional letter specifying cooling method. For phototubes and photomultipliers, the second element is a sequential number and then a letter code identifying vacuum or gas fill and the type of cathode.

  5. Heathkit - Wikipedia

    en.wikipedia.org/wiki/Heathkit

    The company announced in 2011 that they were reentering the kit business after a 20-year hiatus but then filed for bankruptcy in 2012, [2] and under new ownership began restructuring in 2013. As of 2022, the company has a live website with newly designed products, services, vintage kits, and replacement parts for sale. [3]

  6. Coupling (piping) - Wikipedia

    en.wikipedia.org/wiki/Coupling_(piping)

    Examples of adapters include one end BSP threaded with the other NPT threaded, and one end threaded with the other a plain socket for brazing. A coupling whose ends use the same connection method but are of different sizes is called a reducing coupling or reducer. An example is a 3/4" NPT to 1/2" NPT coupling.

  7. Industrial and multiphase power plugs and sockets - Wikipedia

    en.wikipedia.org/wiki/Industrial_and_multiphase...

    The type 15 plug and socket has 3 round pins of 4 mm diameter, plus 2 flat pins (for L2 and L3). It is designed for three phase applications and is rated at 10 A, 250 V/440 V. The socket will also accept types 11 and 12 plugs, and the Europlug. The type 25 plug and socket has 3 rectangular pins, 4 mm x 5 mm, plus 2 flat pins (for L2 and L3).

  8. Component diagram - Wikipedia

    en.wikipedia.org/wiki/Component_diagram

    Programmers and developers use the diagrams to formalize a roadmap for the implementation, allowing for better decision-making about task assignment or needed skill improvements. System administrators can use component diagrams to plan ahead, using the view of the logical software components and their relationships on the system. [2]

  9. Pentagrid converter - Wikipedia

    en.wikipedia.org/wiki/Pentagrid_converter

    Circuit symbol of a heptode. The development of the pentagrid or heptode (seven-electrode) valve was a novel development in the mixer story. The idea was to produce a single valve that not only mixed the oscillator signal and the received signal and produced its own oscillator signal at the same time but, importantly, did the mixing and the oscillating in different parts of the same valve.

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