Category:1939 instrument introductions

Subcategories

This category has the following 6 subcategories, out of 6 total.

Media in category "1939 instrument introductions"

The following 5 files are in this category, out of 5 total.

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  Gibson Kalamazoo amplifier model KEH-... chassis (upper view).jpg 4,000 × 3,000; 5.96 MB
  
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  Homer Dudley (October 1940). "The Carrier Nature of Speech". Bell System Technical Journal, XIX(4);495-515. -- Fig.5 The voder being demonstrated at the New York World's Fair.jpg 1,692 × 2,030; 1.36 MB
  
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  Shure 520DX Green Bullet - Dynamic Harmonica Microphone, along with microphone volume knob on Gibson Kalamazoo amplifier model KEH-....jpg 4,000 × 3,000; 6.33 MB
  
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  Storytone electric piano (1939) by Story & Clark and RCA, art deco design by John Vassos, MIM PHX.jpg 1,936 × 2,592; 1.61 MB
  
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  VODER demonstrated on 1939 New York World Fair - The VODER fascinates the crowds - Bell Telephone Quarterly (January 1940).jpg 2,002 × 1,462; 1.11 MB