Shure - 1932 Shure becomes one of only four U. S. microphone manufacturers with the introduction of the Model 33N Two-Button Carbon Microphone. It is the first lightweight, high-performance product in a
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The Carbon Microphone · Steele Vintage Broadcast Microphone Collection · UGA Special Collections Library Online Exhibitions
File:Carbon microphone, c. 1920s, Ellis Electrical Laboratories - Museum of Science and Industry (Chicago) - DSC06626.JPG - Wikimedia Commons
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