Radio masts and towers Radio masts and towers Radio masts and towers are, typically, tall structures designed to support antennas (also known as aerials) for telecommunications and broadcasting, including television. There are two main types: guyed and self-supporting structures. They are among the tallest man-made structures. Masts are often named after the broadcasting organizations that originally built them or currently use them. In the case of a mast radiator or radiating tower, the whole mast or tower is itself the transmitting antenna. The terms "mast" and "tower" are often used interchangeably. However, in structural engineering terms, a tower is a self-supporting or cantilevered structure,
Jack Ketch in 1828. He is mentioned in the Charles Dickens novels "Oliver Twist", "The Pickwick Papers" and "David Copperfield" and in the C. M. Kornbluth science fiction story "The Marching Morons" (1951). More recently, Jack Ketch plays a role in Neal Stephenson's 2003 and 2004 volumes "Quicksilver" and "The System of the World", the first and last volumes, respectively, in his "The Baroque Cycle" series (though the last volume is set in 1714, well after the death of the historical Jack Ketch.) A Jack Ketch character appears in Neil Gaiman's "The Graveyard Book". Jack Ketch is featured as a non-speaking character