Ad
related to: 50 foot push up antenna mast bracket replacement instructionsebay.com has been visited by 1M+ users in the past month
Search results
Results from the WOW.Com Content Network
The antenna used for broadcasting through the 1920s was the T-antenna, which consisted of two masts with loading wires on top, strung between them, requiring twice the construction costs and land area of a single mast. [2] (pp 77–78) In 1924 Stuart Ballantine published two historic papers which led to the development of the single mast antenna.
By 1930 the disadvantages of the T antenna led broadcasters to adopt the mast radiator antenna. [9] One of the first types used was the diamond cantilever or Blaw-Knox tower. This had a diamond (rhombohedral) shape which made it rigid, so only one set of guy lines was needed, at its wide waist. The pointed lower end of the antenna ended in a ...
Guyed masts are frequently used for radio masts and towers. The mast can either support radio antennas (for VHF, UHF and other microwave bands) mounted at its top, or the entire structure itself can function as a mast radiator antenna (for VLF, LF, MF). In the latter case, the mast needs to be insulated from the ground. Guyed radio masts are ...
The antenna must be very large at the VLF frequencies used; the supporting masts are 250–300 metres (820–980 ft) high, and the topload is about 1,900 metres (6,200 ft) in diameter. The trideco antenna was developed for high power naval transmitters, which transmit on frequencies between 15 and 30 kHz at powers up to 2 megawatts, to ...
Naval Radio Transmitter Facility Aguada is a tall guyed radio mast erected by the United States Navy. It is used as a facility of the US Navy for ashore and U.S. and NATO ships, planes, and submarines operating at sea in areas of broadcast coverage near Aguada, Puerto Rico at 18°23′55″N 67°10′38″W / 18.39861°N 67.17722°W ...
Moxon antenna for the 20-meter band.The antenna is the faint rectangle of wires held in tension by the bent X-shaped support frame. Moxon antenna for the 2-meter band. The Moxon antenna or Moxon rectangle is a simple and mechanically rugged two-element parasitic array, single-frequency antenna. [1]
One of the first uses of 'T' aerials in the early 20th century was on ships, since they could be strung between masts. This is the antenna of RMS Titanic, which broadcast the distress call during her sinking in 1912. It was a multiwire 'T' with a 50-metre (160 ft) vertical wire and four 120-metre (400 ft) horizontal wires.
This consists of a 748 feet (228 m) central mast with 6 vertical wire radiators suspended from its top fed at the base of the mast, attached to 6 rhombic-shaped 2148 ft long horizontal multiwire toploads which radiate from the central mast at angles of 60°, supported by 12 surrounding masts, giving the antenna the shape of a 6-pointed star ...
Ad
related to: 50 foot push up antenna mast bracket replacement instructionsebay.com has been visited by 1M+ users in the past month