If you erect the AT420 antenna near power lines, the base of the antenna must always be at least ________.

When situating the AT420 antenna, it is crucial to ensure safety regarding power lines. The requirement that the base of the antenna must be at least two times its height away from power lines is based on preventing electrical hazards. This distance minimizes the risk of electrical arcing and ensures that the antenna does not come into contact with any live electrical components.

Maintaining a distance that is two times the height of the antenna is a standard safety practice, as it accounts for potential swaying or movement of the antenna in wind and other environmental conditions. This guideline is essential for both personnel safety and the integrity of the communication system, as proximity to power lines can lead to interference and reduce antenna performance.

This safety margin helps ensure that when erecting antennas in close proximity to power sources, there is ample space to avoid accidental contact, which could present significant electrical hazards.