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Removal of load-bearing diagonals during FM antenna installation Multi-station tower supporting antennas of TV stations WDBO-TV, WFTV, and WMFE-TV, and radio stations WDBO-FM and WDIZ-FM – two workers on tower killed KCRG-TV Tower Walker, Iowa: October 4, 1973: Guyed Steel Tower 598 Tower modifications
The construction company had to jury-rig a lifting device of their own design, as the antenna lifting points were not designed for the final lift. The cable from the gin pole would intersect the dish of the antenna and damage it. The design analysis of the construction company was flawed, leading them to underestimate the load on the bolts by a ...
The 1884 Convention for the Protection of Submarine Telegraph Cables was the first international compact to deal with underwater cables. [8] It proscribes breakage or damage of such cables — except by belligerents engaged in open war — and permits the naval forces of state parties to engage in certain enforcement actions against suspected offenders.
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 ...
Cable companies on the other hand took a pro-subscriber side, saying that what is free already – e.g., households with antennas can receive a signal for free – should remain free. [ 11 ] Another media source have revealed that, on the issue of cable operators "must-carry" cable television broadcasters option stated in the Cable Act of 1992 ...
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 ...
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Powerline worker performs maintenance of a lightning arrester on an electrical transmission tower in New Brunswick, Canada. A lightning arrester (alternative spelling lightning arrestor) (also called lightning isolator) is a device, essentially an air gap between an electric wire and ground, used on electric power transmission and telecommunication systems to protect the insulation and ...