File:Frank Conrad radio station 8XK 1920.jpg
From Wikimedia Commons, the free media repository
Jump to navigation
Jump to search
![File:Frank Conrad radio station 8XK 1920.jpg](https://upload.wikimedia.org/wikipedia/commons/thumb/7/74/Frank_Conrad_radio_station_8XK_1920.jpg/797px-Frank_Conrad_radio_station_8XK_1920.jpg?20151020152519)
Size of this preview: 797 × 600 pixels. Other resolutions: 319 × 240 pixels | 638 × 480 pixels.
Original file (800 × 602 pixels, file size: 209 KB, MIME type: image/jpeg)
File information
Structured data
Captions
Captions
Add a one-line explanation of what this file represents
Summary
[edit]DescriptionFrank Conrad radio station 8XK 1920.jpg |
English: Frank Conrad's radio station 8XK in the garage of his home in Wilkinsburgh, PA July 1920, the origin of one of the first pioneering commercial broadcasting stations, the hugely popular KDKA in Pittsburgh, Pennsylvania. Conrad was assistant chief engineer of Westinghouse Corporation. His home station was licensed for experimental work (indicated by the "X" in the callsign) and Conrad used it for communication tests with Westinghouse's downtown Pittsburgh headquarters 4 miles away. During WW1 it was one of the few transmitters allowed to remain on the air, After the war, at the request of fellow "hams", on October 17, 1919 Conrad initiated one of the first entertainment broadcasts, playing phonograph records over his transmitter for two hours each Wednesday and Sunday evening. The next year when Westinghouse decided to start a radio station to promote the sale of their radio receivers, it asked Conrad to set it up. KDKA began broadcasting on 833 kHz at a power of 100 watts from a shack on the roof of Westinghouse's Pittsburgh office building on November 2, 1920, with coverage of the Harding-Cox Presidential election. |
Date | |
Source | Retrieved October 20, 2015 from T. R. Kennedy Jr. "From Coherer to Spacistor" in Radio Electronics magazine, Gernsback Publications, Mt. Morris, Illinois, Vol. 29, No. 4, April 1958, p. 51 on http://www.americanradiohistory.com |
Author | T. R. Kennedy Jr. |
Licensing
[edit]Public domainPublic domainfalsefalse |
![]() |
This media file is in the public domain in the United States. This applies to U.S. works where the copyright has expired, often because its first publication occurred prior to January 1, 1929, and if not then due to lack of notice or renewal. See this page for further explanation.
|
![]() |
![]() |
This image might not be in the public domain outside of the United States; this especially applies in the countries and areas that do not apply the rule of the shorter term for US works, such as Canada, Mainland China (not Hong Kong or Macao), Germany, Mexico, and Switzerland. The creator and year of publication are essential information and must be provided. See Wikipedia:Public domain and Wikipedia:Copyrights for more details.
|
File history
Click on a date/time to view the file as it appeared at that time.
Date/Time | Thumbnail | Dimensions | User | Comment | |
---|---|---|---|---|---|
current | 15:25, 20 October 2015 | ![]() | 800 × 602 (209 KB) | Chetvorno (talk | contribs) | User created page with UploadWizard |
You cannot overwrite this file.
File usage on Commons
There are no pages that use this file.
File usage on other wikis
The following other wikis use this file:
- Usage on arz.wikipedia.org
- Usage on en.wikipedia.org
- Usage on ja.wikipedia.org
- Usage on pt.wikipedia.org
- Usage on uk.wikipedia.org
Metadata
This file contains additional information such as Exif metadata which may have been added by the digital camera, scanner, or software program used to create or digitize it. If the file has been modified from its original state, some details such as the timestamp may not fully reflect those of the original file. The timestamp is only as accurate as the clock in the camera, and it may be completely wrong.
Horizontal resolution | 72 dpi |
---|---|
Vertical resolution | 72 dpi |