transmitting area
71Media in Atlanta — As of 2011[update], metro Atlanta is the ninth largest media market in the United States. Due to apparent over estimates of population growth in the 2000s by the U.S. Census Bureau, this rank is a decrease from two years prior as a result of the… …
72Greenville, North Carolina — City of Greenville   City   City hall on the left and Jarvis Memorial United Methodist Church on the right in Uptown …
73Orford Ness — Orford Ness …
74List of amateur radio organizations — Amateur radio organizations have been important from the earliest days of radio communications. In the early days, there was a very pragmatic reason for this. Amateur radio stations did not have a very wide range, so messages would often have to… …
75Digital television transition in the United States — Further information: Digital television transition The DTV (an abbreviation of digital television, also called digital broadcast) transition in the United States was the switchover from analog (the traditional method of transmitting television… …
76Media in Pretoria — Radio and TV broadcasting in Pretoria is supplied via a network of VHF/FM and UHF transmitters and repeaters owned and operated by Sentech South Africa s state owned broadcast signal distributor from four transmitter sites in and around the city …
77History of radar — The history of radar starts with experiments by Heinrich Hertz in the late 19th century that showed that radio waves were reflected by metallic objects. This possibility was suggested in James Clerk Maxwell s seminal work on electromagnetism.… …
78Marconi Station — The New Brunswick Marconi Radio Station in Somerset, New Jersey, being toured in 1921 by some of the greatest physicists and scientists of the era, including Albert Einstein and Nikola Tesla. The Marconi Wireless Corporation operated numerous… …
79technology, history of — Introduction the development over time of systematic techniques for making and doing things. The term technology, a combination of the Greek technē, “art, craft,” with logos, “word, speech,” meant in Greece a discourse on the arts, both… …
80Television network — Not to be confused with television channel or television station. A television network is a telecommunications network for distribution of television program content, whereby a central operation provides programming to many television… …
