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  • ...df= }}</ref>) and [[David Edward Hughes]] study and published paper on the physics of loose-contact carbon transmitters (work that Hughes did not bother to pa The fundamental design of Edison's fluoroscope is still in use today, although Edison aband
    105 KB (15,290 words) - 17:19, 16 December 2018
  • ...nautograph]] recording<!-- "waveform" refers to an individual cycle of the fundamental or dominant frequency and is not a valid alternative for editors allergic t ...ving coil (MC) (originally called ''dynamic''). Both operate on the same [[physics]] principle of [[electromagnetic induction]]. The moving magnet type was by
    115 KB (17,286 words) - 16:32, 16 December 2018

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