308 Industrial Park Road, Starkville, MS 39759 USA
Ph: (662) 323-9538 FAX: (662) 323-6551
GPG-1B
1/4 Wave Ground Plane
Antenna 144-148 MHz
Instruction Manual
General Description
This antenna is a 1/4-wave ground plane that
operates in the 144-148 Mhz range. The antenna
terminates with a SO-239 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
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 lockwasher (Item 4) as shown in
Figure 1. Tighten hardware securely.
NOTE: Its is important to install the hardware
exactly as shown. This will prevent movement of
the radials.
Insiall 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 SO-239 connector on the botf
,
:
of the antenna.
Mounting
Attach the assembled antenna to the mast using the
U-bolt, lockwashers and nut provided (Item 14, 1 _ ,
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.
After these two radials are fastened securely as
shown, remove the tu
,
o # 10 hex nuts from the #1_
0 bolts (factory installed). Attach a#10 external
lockwasher (Item 4), a radial (Item 11), flatwasher
(Item 6), internal lock
-
washer (Item 7). Refer to
Detail A. The four radials should be spaced 90
degrees apart.
