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Step-9: Construct a base support.
When selecting a site, allow sufficient area to spread out radials and install guys. Confirm that, if toppled by
accident, the antenna can fall in any direction without striking power wires. Also, ensure the top of the
resonator will clear overhead branches when fully extended. The MA160V requires a stable ground support
which must be constructed prior to raising the antenna. Any suitable post-style mount will work, but the
antenna's aluminum base is especially designed to slip inside readily available 1-1/2" OD thin-wall steel
galvanized conduit. This pipe can be purchased at most hardware stores. Drive into the ground for
temporary set-ups, or set into a posthole and capture in concrete for a permanent installation (FIG-9A, 9B).
Important Note: Ensure inside of the conduit is free from concrete and other debris at least 10"
below the top rim so the antenna base tube can seat full-length inside.
Notch support pipe
to prevent antenna
from rotating in base
Step-10: Install resonator section on vertical radiator and pre-tune.
1
010123
1
010011
[ ] Slip fiberglass resonator tube inside the top of 1-1/8" radiator tube BE (FIG-10).
[ ] Align the screw holes as shown.
[ ] Using a 1-1/2" screw and 8-32 nut, secure resonator tube and coil wire in place. Tighten securely.
[ ] Loosen top-section worm clamps, set stinger length to desired band segment (ballpark adjustment):
1.825 MHz = full extension
When installation
is complete,
cut pipe here
1-1/2" ID
Driven
4-5 ft
thin-wall
Mount
minimum
steel
conduit
FIG-9A: Recommended Ground Supports
FIG-9B: Mounting Methods
1-1/2" x 8-32 screw
8-32 nut
(BE)
1-1/8" tube
1-1/2" x 8-32
FIG-10: Resonator Installation Detail
1.85 MHz = 88"
Posthole
Mount
4 ft
captured in
concrete
Use standard TV
style tube-to-tube
splicing U-bolts
1.90 MHz = 72"
1.95 MHz = 56" 2.00 MHz = 42"
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