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Upper section of antenna broke loose and destroyed guy wires due to ice storm WAND and WJJY used the same RCA UHF antennas, mfg in 1969. TV channel 17 (488-494 MHz) Collapsed Easter Sunday. Nebraska Education Tower, Angora: February 1978: Guyed steel lattice mast 457 Ice Zehlendorf bei Oranienburg, East Germany May 21, 1978: Guyed steel lattice ...
Electromagnetic compatibility (EMC) is the ability of electrical equipment and systems to function acceptably in their electromagnetic environment, by limiting the unintentional generation, propagation and reception of electromagnetic energy which may cause unwanted effects such as electromagnetic interference (EMI) or even physical damage to ...
Laptops and tablets are covered for accidental damage from handling, like drops and spills that are a result of normal use. Extended Computer Protection upgrade Members who upgrade their account to any AOL Advantage Plan will automatically receive up to $2500 per 12-month period of Extended Computer Protection — from AOL to repair or replace ...
One of the first radomes. The radome (top) covers the H2S radar system rotating antenna (bottom) on a Halifax bomber. A radome is often used to prevent ice and freezing rain from accumulating on antennas. In the case of a spinning radar parabolic antenna, the radome also protects the antenna from debris and rotational irregularities due to wind ...
A short antenna pole next to a house Multiple Yagi TV aerials. Antennas are commonly placed on rooftops and sometimes in attics. Placing an antenna indoors significantly attenuates the level of the available signal. [19] [20] Directional antennas must be pointed at the transmitter they are receiving; in most cases great accuracy is not needed ...
The reception or transmission of radio waves, a form of electromagnetic radiation, to or from an antenna within a Faraday cage is heavily attenuated or blocked by the cage; however, a Faraday cage has varied attenuation depending on wave form, frequency, or the distance from receiver or transmitter, and receiver or transmitter power.
In telecom circles, any area with more than three antennas could be referred to as an antenna farm. In the case of an AM broadcasting station (mediumwave and longwave, occasionally shortwave), the multiple mast radiators may all be part of an antenna system for a single station, while for VHF and UHF the site may be under joint management.
Officials put forth other theories that could explain the incident, such as a videotape having been brought into the studio and watched by the technician, or deliberate sabotage from an outside prankster, in similar fashion to WSB-TV's 1980 broadcast signal interruption (described above), but Sturdivant let it be known he still believed an ...