Mounting the BigIR (ground)
The BigIR comes with a 1.5” OD aluminum mounting post, 2 feet in length (Figure 1 - D). If
using guy wires, the antenna can be mounted directly into the ground without concrete (the guy
wires will “lock” the antenna in place) but you want to ensure that the mounting pole does not
shift or settle over time, using concrete to secure it in the ground is a good way to eliminate the
potential for this problem. Position the mounting pole (machined end up) so that the bottom of
the element housing is
8 to 10 inches
above the ground (Figure 29).
At this point you want to decide on your guy configuration and mount the guy bracket (s) and
attach the guy wires before erecting the antenna (Figure 35, 36 & 37).
•
No Guy Wires
50 mph
•
One set of guy wires
70 mph
•
Two sets of guy wires (optional bracket)
100 mph
One guy wire connects to one side of the guy bracket and two guy wires connect to the other
side of the guy bracket using the two security snaps (Figure 31).
With the mounting post is in place and level and your guy assembly mounted, you are ready to
erect the antenna. Now slide the small end of the flexible coupler (rubber boot) to the mounting
post (Figure 41). This coupler is used to keep the antenna from potentially “twisting” in high
winds. Pick up the antenna at the base (Figure 33) and slide the antenna housing onto the
mounting pole until it firmly bottoms out. Place the larger end of the flexible coupler over the
antenna housing tube (a small amount of bar soap or other lubricant will help the process).
Tighten clamps on the coupler and secure the guy wires.
Now you are ready to connect the radials! We recommend using a lug connector (crimped &
soldered) at the end of your radials, and then tightening the
lug onto the connector (ground) post shown in Figure 39.
If you purchased the optional radial kits (Figure 28), you
will notice there are 4 wires per set (ground radials), all sol-
dered and crimped to a lug connector.
Figure 28—Ground radials
EHU
Figure 33
10
8 to
in.
Figure 29
Figure 31
2112 116TH AVE NE SUITE 1-5, BELLEVUE WA, 98004 WWW.STEPPIR.COM TEL: (425)-453-1910 FAX: (425)-462-4415
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Summary of Contents for BigIR - MK IV Vertical
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