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File:Slotted array UHF TV broadcasting antenna.jpg

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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 authorUnknown 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

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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inception

June 1963

data size

39,499 byte

height

1,306 pixel

width

208 pixel

media type

image/jpeg

checksum

61c82d460f6a602101d5cf17c6c9a9f8fa450c61

determination method or standard: SHA-1

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Date/TimeThumbnailDimensionsUserComment
current00:44, 1 June 2015Thumbnail for version as of 00:44, 1 June 2015208 × 1,306 (39 KB)ChetvornoUser created page with UploadWizard

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