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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 ...
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 ...
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 antenna is made of a narrow helix of wire like a spring, which functions as the needed inductor. The springy wire is flexible, making it less prone to damage than a stiff antenna. The spring antenna is further enclosed in a plastic or rubber-like covering to protect it. The technical name for this type of antenna is a normal-mode helix. [7]
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Michael Poel, then a special agent with the Illinois State Fire Marshal's Office, was trying to establish whether the fire at Melissa's Lamesch's home was accidental or intentionally set.
4. Not Enough Vitamin D. You shouldn’t get too much sun, but some vitamin D exposure is essential.A review of studies found that people with certain autoimmune diseases may have a vitamin D ...