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Site Selection
Ideally, select a mounting location clear from power lines, structures and other antennas by a
minimum of 45 feet.
Consider overhead power lines, utility cables and wires
.
The vertical 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 antenna to manually tilt down for adjustment or servicing and
make sure there is adequate clearance (at least 45 feet). There should also be a clear diameter of 70
to 130 feet from the antenna for the guying and radial systems that will extend away from the
antenna.
As with all Amateur Radio antennas there maybe compromises and the ideal site may not be
available.
Mounting Tube (A) Installation
When the bottom tube with insulator (A) is ground mounted, it should be protected against
corrosion if placed in concrete, damp acidic or alkaline soil. Asphalt roofing compound,
polyurethane varnish or other sealant that protects against moisture may be used. Concrete may be
used in areas of high winds for greater strength, in which case the post may be twisted slightly
during setting for easy removal later. Ensure it is not mounted at an angle. You want the antenna to
be vertical when fully installed. To help maintain the antenna base, place a larger diameter metal
tube, such as the
BUT-MPS
Mounting Post Sleeve in the ground, then you can slip tube w/insulator
(A) in and it will be protected from direct contact with the concrete.
Tube with insulator (A) must be installed in a hole approximately 21” deep so
that the upper end of the fiberglass insulator is approximately 7” above ground
level. Pack earth tightly around tube w/insulator (A) so that it remains vertical.
When installed, you want the top of
tube
A at 2-3”
or less
above ground level
to keep the feedpoint below 5” above ground level.
NOTE: HAMMERING TUBE W/INSULATOR (A) INTO THE EARTH
MAY CAUSE THE INSULATOR TO SPLINTER. If the post must be hammered into the earth,
protect the end of the insulator with a block of wood
NOTE: DO NOT USE U-BOLTS TO ATTACH TUBE W/INSULATOR (A) TO A MAST,
TOWER ETC. WITHOUT ADDED PROTECTION. U-BOLTS WILL EVENTUALLY CUT
INTO THE TUBING AND WEAKEN THE INSTALLATION. If U-bolts are used, place a larger
diameter metal tube, such as the
BUT-MPS
Mounting Post Sleeve over tube w/insulator (A).
