X300A Instructions.qxp DIAMOND X 300 Antenna

DIAMOND--X-300-ANTENNA DIAMOND--X-300-ANTENNA

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X300A/X300NA
2m/70cm Dual Band High Performance Gain Base Station Antenna
Description
1.

High performance C-Load structure. Liner Phase Shifter
technology permits the antenna to
achieve high performance, high
power rating low vswr, and broader
band coverage on both 2m and
70cm bands.

Specifications
FREQUENCY: 144-148 MHz
435-450 MHz
GAIN:

6.5 dB
9.0 dB

POWER:

200 Watts

IMPEDANCE: 50 Ohms
VSWR:

2.

3.

Direct element joint structure with
two interconnected FRP outershells. Enables the antenna to
maintain the same strength as one
with one piece structure. The ring
gasket makes the antenna waterproof, and therefore maintains
performance even in rainy weather.
When required, the antenna can be
easily assembled or disassembled
by adjusting the joint bracket
accordingly.

less than 1.5:1

MAX WIND
RESISTANCE: 50m/sec (112 MPH)

VSWR Charts
Adjustment
All X-Series antennas are completely
adjustment free. If VSWR of an antenna is extraordinarily high, see if each
connecting part is well contacted. It is
most likely due to bad contact in the
coaxial cable and/or connector connection, or soldering problem. Be sure to
use 50ohm coaxial cable to feed the
antenna.

MAST DIAMETER
ACCEPTED: 30-62mm
(1-1/5” to 2-2/5”)
LENGTH:

2.9m (114.2”)

WEIGHT:

1.9 kg (3.3 lbs.)

Upper Outershell
Upper Outershell
Joint Bracket
Gasket Holder

CONNECTOR: UHF Female (X300A)
N Female (X300NA)

10cm

WARRANTY: 1 Year against defects
in material
or workmanship.

Professional quality maximum
wind resistance is achieved by the
rugged structure. Superior waterproofing eliminates unstable
VSWR that might otherwise
happen in climatic weather. This
antenna may also be used in seaside
or contaminated air environments
as it is rust and corrosion free.

4.

Both of the bands, 2m and 70cm,
can be operated simultaneously by
using optional antenna duplexer.

5.

DC ground structure, which
escapes high voltage caused by
lightning, protects your radio and
equipment.

Upper Element
Element Joint Bracket
Lower Element
Lower Outershell
Joint Bracket
Lower Outershell

Radial Element
Lock Nut

Radial Element

Assembly

DIAMOND ANTENNA Products are distributed by RF PARTS COMPANY
435 S. Pacific Street • San Marcos, CA 92078 • (760) 744-0900

www.diamondantenna.net

shown in Fig. E.
Lower Element

Upper Element

Element Joint Bracket

Fig. B

1.

Screw Driver

6. Attach two mast brackets to the
support pipe. Then connect a coaxial
cable to the feedpoint section through
the support pipe. By aligning the holes
at the bottom of the feedpoint section
and upper part of the pipe, fasten the

7.

Continued on next page...
Connect upper and lower elements.
Lock Washer

2.
3.

A t t a c h
assembled
antenna on
mast, taking
balance into
account.

Put lower element into element
joint bracket thoroughly and fix it.
Then fix upper and lower outer-

Mast
Feedpoint
section

Align holes
and fasten.

Lock
Screw

Support Pipe
Antenna
Mast
Brackets

Fig. G
Mast

Gasket Holder
Lower Outershell Joint Bracket
Upper Outershell Joint Bracket

Fig. C

Fasten upper outershell joint
bracket with a wrench by holding
lower outershell joint bracket
firmly with a wrench at the same
time. Fasten the brackets until there

Fig. D

is no gap between them to ensure a
waterproof connection.

5.

Attach three radial elements as
Radial Element
Lock Nut
Radial
Element

Fig. E

Mast Bracket

pipe with a lock screw.

shells with outershell joint bracket
as shown in Fig. C.

4.

Fig. F

For Your Safety

Antenna Installation Precautions

Please read the following safety
precautions before antenna assembly.

To determine antenna installation location, there are
several factors to be taken into account. First thing is
antenna propagation direction to specific target stations.
As to whether there are any obstacles such as tall
buildings on the line of sight. Next is specific installation
location. As to whether specific location is adequate in
terms of antenna support and surrounding safety.
• Do not attempt to install the antenna by yourself if you
do not have any experience in installing base station
antenna. Ask your experienced friends or a professional
for help.
• Do not attempt to install the antenna at a location where
it does not have enough distance from nearby electric
power lines. It is advised to install the antenna at least
twice of total antenna height from nearby electric
power lines.
• Do not install the antenna on any type of tower, pole or
telescopic mast which exceeds 30 feet high, if you do
not have enough experience in installing the antenna on
that kind of location. Ask your experienced friends or a
professional for help.
• Do not use more than 1/10’ section if you install the
antenna on iron plumber’s pipe. Attach guy wire if multiple pipes are used to install the antenna.

• Assemble the antenna on the ground or
wide and flat place such as on balcony
before installation.
• Do not assemble or install the antenna on a
place where you can not have enough distance from any electric power lines.
• Do not install the antenna on a rainy or
windy day.
• Do not attempt to install the antenna only by yourself.
Installing the antenna alone on the roof may lead you to
a dangerous accident. Always ask your friends or a
professional for help installing the antenna.
• Do not use iron or aluminum ladder at a reachable
distance from any electric power lines.
• Do not install the antenna on a mast which is not
grounded properly.
• Do not have your family members or friends touch or
come close to the antenna, unless they have realized its
potential danger.
TO AVOID FATAL ACCIDENT
• Do not attempt to sustain the antenna, or any part of
support structure if it begins to fall down. Let it fall by itself.
• Do not attempt to remove or restore the antenna or any
part of support structure if it touches an electric power
line. Let it be as it is, do not touch it, and call your local
electric power company immediately.
IN CASE OF AN ACCIDENT
• Do not touch a person or an animal who is or seems to
be in contact with the antenna or any support structure
which is fallen on a live electric power line. Touching
one may lead you to be electrocuted.
• Do not attempt to separate a person or an animal who is
or seems to be in contact with the antenna or any support
structure which is fallen on a live electric power line by
yourself. Call or have someone call a police officer,
ambulance, or doctor immediately.



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Metadata Date                   : 2006:07:24 18:24:34Z
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Title                           : X300A Instructions.qxp

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