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[pdf] GPS Lightning Protection and Antenna Placement - The first consideration for GPS antenna placement is a clear view of the sky, preferably 360 degrees. In the usual installation, the GPS antenna is located low and close to the equipment building roof...
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[pdf] Ground Impedance - Before one can design a properly sized grounding system for the required fall of potential measurement, the resistivity of the soil must be known. The resistivity results will determine the conductor ...
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[pdf] Ground Rod Theory Installation - The statement that rods should have a separation, “greater than the sum of their lengths apart,” originates from theory, and the fact almost all ground rods will saturate the soil to which...
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[pdf] Grounding & Materials - We have discussed the lightning event, how sites get damaged, and how to direct this damaging energy to earth ground. But what (in this context) is ground? Ground is the “sink” for electro...
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[pdf] Halo Grounds - There are many opinions about how to ground equipment inside the equipment room. Two options are presented here. When a large conductor such as a tower has high peak current flow through it (such as a...
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[pdf] Ham Radio Station Protection - Proper lightning protection for a ham radio station can involve more variables than any other type of radio site. The antenna location will establish the grounding requirements, while the station loca...
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[pdf] Insulated Support Structures - Wood or fiberglass support structures are not a good idea. They are an insulator. The cabinet earth ground, coaxial cables, and conduits attached to the support would be the only conductive path for l...
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[pdf] Lightning Protector Location - One of the basic ideas in developing a protection strategy is not allowing stray energy to flow through the equipment. There are several ways to accomplish this. One is to totally disconnect the equip...
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[pdf] Lightning Protector Surge Current Ratings - Since the purpose of any coax protector is to equalize the center conductor potential with the shield potential to minimize current flow through the equipment input, how much lightning current will ac...
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[pdf] MIL-STD 188-125 - Electromagnetic Pulse (EMP) is an intense electromagnetic field that can instantly overload electrical circuits and damage microelectronics, electrical control and communications systems as well as el...
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