Hy-Gain GPG-1B Instruction Manual

308 Industrial Park Road, Starkville, MS 39759 USA

(

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662) 323-9538 FAX: [phone]

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Instruction Manual

General Description

GPG-1B

1/4 Wave Ground Plane

Antenna 144-148 MHz

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

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
mountin

New holes may be drilled in the base bracket (Item

1) if necessary.

surface.

After these two radials are fastened securely as
shown, remo ve the tu
0 bolts (factory installed). Attach a#10 external
lockwasher (Item 4), a radial (Item 11), flatwasher
(Item 6), internal lock
Detail A. The four radials should be spaced 90
degrees apart.

,

o # 10 hex nuts from the #1_

-

washer (Item 7). Refer to

Figure 1

Q

PARTS LIST

Item Part No. Descriptions
No.

1 63945 Base Bracket 1
2 173218 Radiator, 18-9/16" 1
3 861677 Insulator Assembly 1
4 not use
5 565697 Lock
6 561165 Flatwasher, #10, stainless steel 8
7 554071 Nut, 10-24 hex, stainless steel 5
8 505751 Bolt, #10-24 x 3/4, stainless steel 5
9 not use
10 610-2005T Connector, SO-239 1
11 173217 Radial, 1/4" x 15-3/4 4
12 not use
13 455644 Caplug, 7/16", black 1
14 380866 U-bolt, 5/16-18 x 1-5/8 x 2-1/4 1
15 565748 Lockwasher, 5/16" internal 2
16 555747 Nut, 5/16-18 2

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washer, #10 internal, stainless steel 13

TY