Hy-Gain GPG-1 Instruction Manual

308 Industrial Park Road
Starkville, MS 39759 USA
(662) 323 -953 8 FAX: (662) 32 3-655 1

General

This antenna is a 1/4-wave ground plane that
operates in the 162-174 MHz range. The antenna
terminates with a type `N" connector and is fed
with a 50 ohm coaxial cable.
warning
When installing your system, take extreme
care to avoid any accidental contact with
power lines or overhead obstructions.
Failure to exercise this care could result in
serious or fatal injury.

Assembly Instructions

Refer to Figure 1 Cutting Chart. Trim the radiator
to the correct length for the frequency of operation.
Figure 1
Ph:
Instruction Manual
GPG-1
1/4-Wave Ground Plane Antenna
162-174 Mhz Frequency Range
Remove the four (4) radials (Item 11), from the
shipping container and attach two of the radials to
the base bracket (Item 1) at the two open spaces
(where there is no factory installed hardware). Use
the #10 x 3/4" screw (Item 8), nut (Item 7),
flatwasher (Item 6), internal lock-washer (Item 5),
and external lockwaasher (Item 4) as shown in
Figure 2. Tighten hardware securely.
After these two radials are fastened securely as
shown, remove the two #10 hex nuts from the #10
bolts (factory installed). Attach a#10 external
lockwasher (Item 4), a radial (Item 11), flatwasher
(Item 6), internal lockwasher (Item 7). Refer to
Detail A. The four radials should be spaced 90
degrees apart.
NOTE: Its is important to install the hardware
exactly as shown. This will prevent movement of
the radials.
Install the caplug (Item 13) on the top of the
radiator. Be sure it is pressed all the way on.
Connect your coax from your communication
equipment to the type `N' connector on the bottom
of the antenna.
Mountin
Attach the assembled antenna to the mast using the
U-bolt, lockwashers and nut provided (Item 14, 15,
and 16). The antenna may also be attached to a flat
vertical surface.
NOTE: The radials must be above the top of any
mounting surface.
New holes may be drilled in the base bracket (Item
1) if necessary.