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File:1939 Mission Bell Model 410 with Magic Eye Tube.jpg

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English: Magic Eye or Electron Ray Tubes invented by Allen DuMont were low cost alternatives to panel meters in the late 1930's to early 1940's. People like the green glow and the movement of the target as they tuned in a station.
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Source Own work (Original text: Photo of my personal radio collection)
Author Engradio

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Transferred from en.wikipedia to Commons by Kelly using CommonsHelper.

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  • 2013-02-25 17:28 Engradio 2896×1944× (1585249 bytes) Uploading a self-made file using [[Wikipedia:File_Upload_Wizard|File Upload Wizard]]


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current22:28, 19 February 2014Thumbnail for version as of 22:28, 19 February 20142,896 × 1,944 (1.51 MB)File Upload Bot (Magnus Manske) (talk | contribs)Transfered from en.wikipedia by User:Kelly using CommonsHelper

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