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By 1930 the expense of the T-antenna led broadcasters to adopt the mast radiator antenna, in which the metal structure of the mast itself functions as the antenna. [ 2 ] (pp 79–81) One of the first types used was the diamond cantilever or Blaw-Knox tower .
The diamond-shaped tower was patented by Nicholas Gerten and Ralph Jenner for Blaw-Knox July 29, 1930. [5] and was one of the first mast radiators.[1] [6] Previous antennas for medium and longwave broadcasting usually consisted of wires strung between masts, but in the Blaw-Knox antenna, as in modern AM broadcasting mast radiators, the metal mast structure functioned as the antenna. [1]
Replaced by triangle antenna Liechtenstein-Haberfeld transmitter November 21, 1938: Storm Utbremen Radio Tower, Bremen, Germany 1939: Free standing wood lattice tower 90 Lightning Replaced by steel tower Radio Normandie Transmitter, Tower West, Fécamp, France [2] November 7, 1940: Free standing lattice tower 113 Storm Langenberg, Germany 1949
Radio towers and masts that have been demolished or destroyed due to engineering error, replacement, or controlled demolition. Some of the radio masts could be either unfinished or abandoned. Pages in category "Former radio masts and towers"
It’s very bizarre to live in a world where you can buy U.S. cities on the same website that you can buy a bunch of '90s Xena tapes. Related: The Most Expensive Items at Sam's Club Cheapism ...
A tower array is an arrangement of multiple radio towers which are mast radiators in a phased array. [1] They were originally developed as ground-based tracking radars. [2] Tower arrays can consist of free-standing or guyed towers or a mix of them. Tower arrays are used to constitute a directional antenna of a mediumwave or longwave radio station.
The multiple-tuned flattop antenna is a variant of the 'T'-antenna used in high-power low-frequency transmitters to reduce ground power losses. [7] It consists of a long capacitive top-load consisting of multiple parallel wires supported by a line of transmission towers, sometimes several miles long.
Such operating events are not traditional ham radio contests inasmuch as they are a night of friendly QSO’s using home-built, restored commercial ham, broadcast or military equipment. [20] The Antique Radio Club of Illinois operates a vintage radio station as a public demonstration at the Antique RadioFest allowing licensed amateurs who visit ...