Yaesu G-550 Instruction Manual - page 7
P
AGE
5
G-550 I
NSTALLATION
M
ANUAL
ROTATOR INSTALLATION
The G-550 is designed to accommodate small- and medium-size antenna arrays. The
maximum safe load depends on the physical size of the antenna, method and quality
of mechanical installation, and maximum wind velocity at the installation site.
The diagrams below show several recommended installations. Notice that the pre-
ferred mounting method requires that each antenna be attached to the boom at its
center of gravity, with the boom there attached to the rotator at its center of gravity.
This minimizes stress on the rotator and supporting structure, especially during strong
winds.
1. Referring to Figure 1, screw one 8mm nut over the end of each stud bolt with the
shortest thread. Slip a spring washer over the threads, and screw each stud bolt
into holes in the side of the rotator.
2. Slip an 8mm flat washer over each installed stud bolt, and then the pipe clamps, as
shown in Figure 2. Place another flat washer and then spring washer over the end
of each stud bolt, and start a nut on each to hold the hardware in place.
3. Slide the boom through the rotator.
4. Place one U-bolt over each arm of the rotator, and assemble one pipe clamp, flat
washers, spring washers and nuts on the U-bolts as shown in Figure 2. Center the
boom carefully, and alternately tighten the nuts on each U-bolt 1/2-turn beyond
the point where the spring washers are flattened.
Figure 1
Figure 2