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  2. Amateur radio homebrew - Wikipedia

    en.wikipedia.org/wiki/Amateur_radio_homebrew

    Homebrew is an amateur radio slang term for home-built, noncommercial radio equipment. [1] Design and construction of equipment from first principles is valued by amateur radio hobbyists, known as "hams", for educational value, and to allow experimentation and development of techniques or levels of performance not readily available as commercial products.

  3. Kelvin water dropper - Wikipedia

    en.wikipedia.org/wiki/Kelvin_water_dropper

    Fig. 3: A Kelvin water dropper set up at the 2014 Cambridge Science Festival If the buckets are metal conductors, then the built-up charge resides on the outside of the metal, not in the water. This is part of the electrical induction process, and is an example of the related " Faraday's ice bucket ".

  4. An Open Letter to Hobbyists - Wikipedia

    en.wikipedia.org/wiki/An_Open_Letter_to_Hobbyists

    At the next Homebrew Computer Club meeting, 50 copies of Altair BASIC on paper tape appeared in a cardboard box. [11] MITS offered a complete Altair system with two MITS 4K Dynamic RAM boards, a serial interface board and Altair BASIC for $995. [12] However, the $264 MITS RAM boards were unreliable, due to several component and design problems.

  5. Homebrew Computer Club - Wikipedia

    en.wikipedia.org/wiki/Homebrew_Computer_Club

    The Homebrew Computer Club was an early computer hobbyist group in Menlo Park, California, which met from March 1975 to December 1986. The club had an influential role in the development of the microcomputer revolution and the rise of that aspect of the Silicon Valley information technology industrial complex.

  6. Drawing board - Wikipedia

    en.wikipedia.org/wiki/Drawing_board

    A 19th century architect at the drawing board. A drawing board (also drawing table, drafting table or architect's table) is, in its antique form, a kind of multipurpose desk which can be used for any kind of drawing, writing or impromptu sketching on a large sheet of paper or for reading a large format book or other oversized document or for drafting precise technical illustrations (such as ...

  7. List of Hammond organs - Wikipedia

    en.wikipedia.org/wiki/List_of_Hammond_organs

    Similar to the B-V, but without a chorus generator, and with in a church style cabinetry. [17] C-2: 1949–1954 [11] Identical to the B-2 except for cabinetry (Tudor-style "closed" cabinet). C-3: 1954–1974 [12] The second best known Hammond. Identical to the B-3 except for cabinetry. D: 1939–1942 [8] A model C organ with factory supplied ...

  8. Generator interlock kit - Wikipedia

    en.wikipedia.org/wiki/Generator_Interlock_Kit

    Early generator interlock kits consisted of two sliding steel or plastic (depending on the brand) plates held together by three bolts and installed on the front cover of the home's breaker panel, however, some models made by Eaton (formerly Cutler-Hammer) and Siemens for panels manufactured by them install on the adjacent circuit breakers themselves and consist of a sliding arm for breakers ...

  9. VTech CreatiVision - Wikipedia

    en.wikipedia.org/wiki/VTech_CreatiVision

    The Manager had a Finnish keyboard layout and character set. A module to allow ColecoVision games to be played was designed for use with the CreatiVision Mark-2 model (a later revision of the 1st model, incorporating hardware changes specifically designed to make the Coleco-module work).