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CHAPTER 2 INSTALLATION
INSTALLING THE RADIO
Choose a convenient location for operation that does not interfere with driver or passen-
ger. This radio is supplied with a universal mounting bracket. When mounting the bracket
and radio to your car, make sure it is mechanically strong. Also, provide a good electrical
grounding connection to the chassis of vehicle. Proceed as follows to install the radio.
Locate a convenient area in your vehicle for the installation of the radio. Hold the moun-
ting bracket with the radio in the location where the radio is to be installed. Make sure
nothing will interfere with either the radio or the mounting bolts. Mark and then drill
holes for the mounting bracket.
Most radio antennas come equipped with a PL-259 plug. Connect this plug to the ANT.
Jack in the rear of the radio.
Extending from the rear of the radio is a fused red and black wire for the DC connections
to the vehicle’s electrical system. For best performance, it is strongly recommended that
the red lead be taken directly to the positive terminal on the vehicle’s battery and the
black lead be connected to the nearest chassis ground. (Note:
This radio is designed for
vehicles with negative ground systems
.)
Connections should be made using appropriate “crimp on” lugs of a size large enough to
make good contact with the bolt used to fasten to the battery and the chassis ground.
It is a good safety idea to install a second fuse that would provide protection in case the
red wire was to “fray” or get pinched and short to the body of the vehicle, somewhere
between the battery and the radio.
Poor power connections cause supply voltage drops that can substantially decrease the
performance of your radio. A good DC connection is probably one of the most important
things for getting the best transmitter performance and in some cases, least receiver no-
ise.
Mount the microphone bracket near the radio in an easily accessible spot using the two
screws provided.
IGNITION NOISE INTERFERENCE
With weak signals, you may experience interference of the signal by background noise.
This radio has NB and ANL circuits which will help reduce background noise from sources
such as your ignition system. However, background electrical noise may come from se-
veral sources and all noise may not be eliminated. With extremely weak signals, you can
operate this radio with the engine turned off, which should improve reception. If the igni-
tion noise level is too high to allow proper operation under most conditions, you should
have your installation of the radio checked by a qualified technician.
ANTENNA
This radio has a jack in the rear for a standard PL-259 antenna plug. If you are looking for
the most range for your transmission, use a vertically polarized, quarter-wave length an-
tenna. If antenna height is a problem, you may use a shorter, loaded-type whip antenna
although you can expect some loss of transmission range.
To improve performance, your antenna should be matched to your radio. Your
antenna can be adjusted so that it matches your radio.
EXTERNAL SPEAKER
The external speaker jack (EXT SP.) on the rear panel is used for remote receiver monito-
ring. The external speaker should have 8 ohms impedance and be able to handle at least
4 watts. When the external speaker is plugged in, the internal speaker is disconnected.
PUBLIC ADDRESS
To use the Public Address (PA) function, first connect an external speaker to the PA. SP.
Jack on the rear of the radio. See the above specifications for a proper external speaker.
Keep the speaker away from the microphone to avoid acoustic feedback.
CHAPTER 3 OPERATION
CONTROL FUNCTIONS
FRONT PANEL
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