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leave. Additional weatherproofing protection may be used on the coaxial connections.
WARNING!
INSTALLATION OF ANY ANTENNAS NEAR POWER LINES IS DANGEROUS
Warning
:
Do not locate the antennas near overhead power lines or other electric light or power
circuits, or where they can come into contact with such circuits. When installing the antennas, take
extreme care not to come into contact with such circuits, because they may cause serious injury or
death. Make sure when you are digging, you are not near any buried utility lines.
Overhead Power Line Safety
Before you begin working, check carefully for overhead power lines in the area you will be
working. Don't assume that wires are telephone or cable lines: check with your electric utility for
advice. Although overhead power lines may appear to be insulated, often these coverings are
intended only to protect metal wires from weather conditions and may not protect you from electric
shock
Keep your distance! Remember the 10-foot rule: When carrying and using ladders and other long
tools, keep them at least 10 feet away from all overhead lines - including any lines from the power
pole to your home.
Installation
Site Selection
Select mounting locations clear from power lines and structures by a minimum of height of the
monoband antennas used plus 10 feet (for the 10 foot safety rule).
Consider overhead power lines,
utility cables and wires
. The monoband verticals should be mounted away from local noise sources
or other metallic objects which can re-radiate noise and affect the tuning, radiation pattern and
SWR. Determine the direction you want the array positioned. There should also be a clear diameter
from the monoband antennas for the guying and radial systems that will extend away from the
antennas.
Topographical Considerations
Flat or gradually sloped land is best. Erecting the transmitting array on steeply sloped land or
uneven terrain might degrade performance. To avoid pattern degradation, antenna elements should
have reasonably similar elevations. It's recommended the maximum ground height difference
between any of the vertical antennas in the array should be less than 20% of the array diameter. For
example, two 80 meter verticals 66 feet apart should be within 13 feet of level. Every effort should