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Height above average terrain (HAAT), or (less popularly) effective height above average terrain (EHAAT), is the vertical position of an antenna site above the surrounding landscape. HAAT is used extensively in FM radio and television , as it is more important than effective radiated power (ERP) in determining the range of broadcasts ( VHF and ...
For transmissions in the shortwave range, there is little to be gained by raising the antenna more than a half to three quarters of a wavelength above ground level, and at lower frequencies and longer wavelengths, the height becomes infeasibly great (greater than 85 metres (279 ft)). Shortwave transmitters rarely use masts taller than about 100 ...
The total height of both is 1,987 feet (606 m). The antenna weighs 9,000 pounds (4.1 t), the lattice tower weighs 855,500 pounds (388.0 t), giving a total weight of 864,500 pounds (392.1 t). It takes up 160 acres (65 ha) of land with its guy anchors. [7] [8] Its height above mean sea level is 2,962 feet (903 m).
The platforms support antennas and equipment cabinets used by various two way radio systems and remote pickup unit (RPU) receivers for radio broadcasters. Heights: Elevation of Site Above Mean Sea Level: 24.1 m (79 ft) Overall Height Above Ground (AGL): 600.7 m (1,971 ft) Overall Height Above Mean Sea Level: 624.5 m (2,049 ft)
There was a taller tower from 1987 or 1988 until 1994 or 1995 when it was dismantled. It belonged to WCOM-TV (Mansfield Ind 68) and was located just south of Butler, Ohio. WCOM-TV signed on March 3, 1988. The height of the tower was 1,748 ft (533 m). WCOM-TV used the tall tower and a directional antenna to try to serve the Columbus market. The ...
Putting an antenna indoors significantly decreases its performance due to lower elevation above ground level and intervening walls; however, in strong signal areas, reception may be satisfactory. [20] One layer of asphalt shingles, roof felt, and a plywood roof deck is considered to attenuate the signal to about half. [25]