Datoteka:Yagi TV antenna 1954.png

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Yagi_TV_antenna_1954.png ‎(433 × 302 piksela, veličina datoteke: 6 KB, MIME tip: image/png)


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Sažetak

Opis
English: A television antenna from a 1954 advertisement by the Radiart Corp., Cleveland, Ohio. It is a Yagi-Uda antenna for use on the 'low band' analog channels 2-4, 47 - 68 MHz. It has three director elements (crossbars on left) and one reflector (crossbar on right), and it's direction of greatest sensitivity (main lobe) is of the end of the antenna to the left. The driven element is a folded dipole to match the 300 ohm twin lead feedline to the TV set. The antenna is made of aluminum tubing, the elements are roughly 6 feet across.

Changes to image: Cropped out advertising copy and adjacent intruding images, redrew minor areas in image that were smudged through poor copying.
Datum
Izvor Retrieved September 11, 2014 from Tele-Tech magazine, published by Caldwell-Clements Inc., New York, Vol. 13, No. 3, March 1954, p. 36 on American Radio History website
Autor NepoznatUnknown author
Dopuštenje
(Naknadna uporaba ove datoteke)		 This image is from an advertisement for the Radiart Corp. 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.

Licencija

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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ožujka 1954

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