File:Armstrong FM radio station W2XMN Alpine NJ 1940.jpg

Original file (654 × 961 pixels, file size: 215 KB, MIME type: image/jpeg)

Summary

Description
English: First broadcast FM radio station W2XMN built by Edwin Armstrong in 1938 in Alpine, New Jersey, USA. The insets show a portion of the transmitter, and a map of Armstrong's network of FM stations in 1940.
Date
Source Retrieved October 3, 2015 from E. W. Murtfeldt, "What are the facts about FM?" in Popular Science magazine, Popular Science Publishing Co., New York, Vol. 137, No. 5, November 1940, p. 73 on Google Books
Author E. W. Murtfeldt
Permission
(Reusing this file)
This 1940 issue of Popular Science magazine would have the copyright renewed in 1968. Online page scans of the Catalog of Copyright Entries, published by the US Copyright Office can be found here. Search of the Renewals for Periodicals for 1967, 1968, and 1969 show no renewal entries for Popular Science. Therefore the copyright was not renewed and it is in the public domain.

Licensing

Public domain
This work is in the public domain because it was published in the United States between 1929 and 1963, and although there may or may not have been a copyright notice, the copyright was not renewed. For further explanation, see Commons:Hirtle chart and the copyright renewal logs.

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Camera location40° 57′ 31.8″ N, 73° 55′ 23.4″ W  Heading=0° Kartographer map based on OpenStreetMap.View this and other nearby images on: OpenStreetMapinfo

Captions

Edwin Armstrong's experimental FM station in 1938

Items portrayed in this file

depicts

November 1940

40°57'31.799"N, 73°55'23.401"W

heading: 0 degree

image/jpeg

3343c938ff8ff8df2a2a7916cb440ba0ebd4a289

220,449 byte

961 pixel

654 pixel

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Date/TimeThumbnailDimensionsUserComment
current18:02, 3 October 2015Thumbnail for version as of 18:02, 3 October 2015654 × 961 (215 KB)ChetvornoUser created page with UploadWizard

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