File:Katy-1 television antenna 1954.jpg
Size of this preview: 764 × 600 pixels. Other resolutions: 306 × 240 pixels | 611 × 480 pixels | 838 × 658 pixels.
Original file (838 × 658 pixels, file size: 68 KB, MIME type: image/jpeg)
Captions
Captions
Add a one-line explanation of what this file represents
Summary
edit
| Description |
English: VHF Yagi television antenna from 1954, model Super Katy-1, manufactured by Kay-Townes Antenna Co., Rome, Georgia. This is an example of the complicated Yagi antenna designs that were developed to cover the US analog television frequencies, which were split between two bands; channels 2 - 6, 47 - 88 MHz, and channels 7 - 13, 174 - 240 MHz. In general, the shorter elements functioned as half-wave dipoles for the higher frequency band, the longer straight ones functioned on the lower band, and the slanted elements functioned both on the low band and, at their second harmonic, on the higher band. The beam direction of the antenna is to top right. The design of these early TV antennas is described in Edward M. Noll & Matthew Mandl, The Continuous Evolution of Television Antennas, p. 64 in the source. Alterations to image: cloned out advertising copy in background. |
| Date | |
| Source | Retrieved March 10, 2014 from Radio and Television News magazine, Ziff-Davis Publishing Co., New York, Vol. 51, No. 5, May 1954, p. 32 on http://www.americanradiohistory.com |
| Author | Unknown author |
| Permission (Reusing this file) |
This image is from an advertisement for Kay-Townes Antenna Co. without a copyright notice published in a 1954 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
edit
|
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.
|
 |
File history
Click on a date/time to view the file as it appeared at that time.
| Date/Time | Thumbnail | Dimensions | User | Comment | |
|---|---|---|---|---|---|
| current | 23:46, 10 March 2015 | | 838 × 658 (68 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 fr.wikipedia.org
