Hy-Gain TH-1 Rotatable Dipole Instructions
5
1.
Be careful when carrying and installing the antenna. It is heavy enough to cause you to lose
your balance if it is handled too casually or if the antenna is snagged on anything.
2.
Mount the antenna high enough so that it is out of reach. The ends of the antenna can cause
eye injury, serious RF burns or both.
3.
Make sure that the mast is sturdy enough to support the 8-pound weight and the wind loading
of approximately 1-square foot.
ASSEMBLY and INSTALLATION PROCEDURE
Refer to the figures in this manual during assembly. Assembly consists of putting together the
center insulator assembly, then connecting the aluminum radiating elements to the center
insulator assembly, and finally attaching the feedline. After the antenna is assembled and
adjusted for resonant frequency and SWR, it can then be mounted on a tower or rooftop.
WARNING:
Wear safety glasses whenever working with this antenna.
Step-By-Step Procedure
1) Find a flat work area with the necessary clearance for assembly. The TH-1 is easily
assembled on the ground.
2) After examining the antenna parts, gather the following tools needed for assembly:
•
Small (4”-6”) adjustable wrench OR 5/16" nut driver for hose clamps and 7/16"
open end wrench for center insulator bolts.
•
Safety glasses.
3) Loosely assemble the U-bolt set to the 1-1/4” fiberglass rod using supplied hardware. The
nuts will be tightened when the antenna is mounted on the mast. See Figure 1.
4) Slide the 1-3/8 x 12” aluminum tubes over each side of the center insulator assembly.
Insert the ¼-20 bolts through the aluminum tube/fiberglass assembly. Add the ¼-20 split
lockwashers and nuts and fasten loosely, as the feedline will be connected to this
hardware later on. See Figure 2.
Fiberglass Rod
LW & nut
(2 plcs)
U-Bolt set
Figure 1: Center Insulator Assy – Top View
