File:Slotted array UHF TV broadcasting antenna.jpg
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Original file (208 × 1,306 pixels, file size: 39 KB, MIME type: image/jpeg)
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Summary
| Description |
English: A UHF television broadcasting antenna consisting of a waveguide with slots in it, from a 1963 advertisement in an electronics magazine. The ad copy says it had a gain of 11 to 52 dB over the UHF band of 470 to 890 MHz with a VSWR of 1.07 or better, and could handle 100 kW of radiated power. |
| Date | |
| Source | Retriever August 2, 2014 from Broadcast Engineering magazine, Howard W. Sams Co., Indianapolis, Indiana, Vol. 5, No. 6, June 1963, p. 8 on http://www.americanradiohistory.com/ |
| Author | Unknown author |
| Permission (Reusing this file) |
This image is from an advertisement by Coel Co. without a copyright notice published in a 1963 magazine. In the United States, advertisements published in collective works (magazines and newspapers) are not covered by the copyright notice for the entire collective work. (See U.S. Copyright Office Circular 3, "Copyright Notice", page 3, "Contributions to Collective Works".) Since the advertisement was published before 1978 without a copyright notice, it falls into the public domain. |
Licensing
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This work is in the public domain in the United States because it was published in the United States between 1929 and 1977, inclusive, without a copyright notice. For further explanation, see Commons:Hirtle chart as well as a detailed definition of "publication" for public art. Note that it may still be copyrighted in jurisdictions that do not apply the rule of the shorter term for US works (depending on the date of the author's death), such as Canada (50 p.m.a.), Mainland China (50 p.m.a., not Hong Kong or Macao), Germany (70 p.m.a.), Mexico (100 p.m.a.), Switzerland (70 p.m.a.), and other countries with individual treaties.
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File history
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| Date/Time | Thumbnail | Dimensions | User | Comment | |
|---|---|---|---|---|---|
| current | 00:44, 1 June 2015 | | 208 × 1,306 (39 KB) | Chetvorno | User created page with UploadWizard |
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