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File:Fessenden alternator transmitter (1906).jpg

Original file ‎(2,156 × 2,352 pixels, file size: 1.61 MB, MIME type: image/jpeg)

Summary

Description
English: Fessenden alternator transmitter at Brant Rock, Massachusetts
Date
Source Illustration on page 49 of the January 26, 1907 issue of The American Telephone Journal, magazine, included in the article "Experiments and Results in Wireless Telephony" by John Grant
Author Uncredited magazine article illustration

Licensing

Public domain
This work is in the public domain in the United States because it was published (or registered with the U.S. Copyright Office) before January 1, 1929.
Public domain works must be out of copyright in both the United States and in the source country of the work in order to be hosted on the Commons. If the work is not a U.S. work, the file must have an additional copyright tag indicating the copyright status in the source country.
Note: This tag should not be used for sound recordings.PD-1923Public domain in the United States//commons.wikimedia.org/wiki/File:Fessenden_alternator_transmitter_(1906).jpg

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26 January 1907Gregorian

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Date/TimeThumbnailDimensionsUserComment
current19:31, 20 November 2018Thumbnail for version as of 19:31, 20 November 20182,156 × 2,352 (1.61 MB)Thomas H. WhiteHigher quality scan
16:43, 13 October 2018Thumbnail for version as of 16:43, 13 October 2018301 × 293 (31 KB)Sokoljanimproved contrast
11:58, 13 January 2017Thumbnail for version as of 11:58, 13 January 2017301 × 293 (25 KB)Thomas H. WhiteUser created page with UploadWizard
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