• Mount it as far as possible from sources of noise (ignition system, gauges, etc.)
and keep the transmission line away from these noise sources.
• An antenna mounted in a boat requires a good ground connection.
This can be either a metal hull or a ground made of tin-foil or copper sheeting.
This ground should cover an area of at least 1 m2 or more. Be sure the transceiver
also has an adequate ground. There are many types of mobile CB antennas: a full
quarter-wave length whip, a centerloaded whip, top loaded whip and the base loa-
ded type are typical. A vertically polarized whip antenna is best suited for mobile ser-
vice. It is omnidirectional.
If it’s the loaded type, you will find it a physically shorter antenna. But, for greater
efficiency the 2.5 m long, full quarter-wave whip is better. Antenna length is directly
related to efficiency.
Generally, the longer it is the more efficient.
There are many possible antenna locations on a car.
Four of the most popular are shown and discussed on the following.
Roof Mount In this position the antenna radiates equally in all directions.
Since the normal 1/2 wavelength whip antenna is too long for
roof mounting on a vehicle, the antenna is shortened and loa-
ding coil is used to provide the proper electrical length. Our
fiberglass roof mount is a good durable antenna.
Front Cowl Mount The radiation pattern is slightly greater in the direction of the
rear fender opposite the side on which the antenna is moun-
ted. However, the front position offers a number of advanta-
ges. The CB antenna can be easily mounted. It can double as
both the CB and the standard auto radio antenna by emplo-
ying a two-way coupler. Ask about our complete line of
antennas.
Rear Deck Mount The radiation pattern is stronger in the direction of the front
fender opposite the side on which the antenna is mounted. In
this position you can use a full quarter-wave antenna or a
shorter loaded whip. Here you might consider one of the full
2.5 meters whips.
Bumper Mount The antenna radiates in a pattern directly in front of and to
the rear of the vehicle, with maximum radiation directly away
from the vehicle, in a horizontal plane. Despite its fairly irre-
gular pattern, a bumpermounted full-length whip antenna
will normally give the best results. Removing the antenna is
simple and will leave no holes in the car.
5
ENGLISH
can be connected to negative ground system. Just be sure you connect the RED
wire to the (+) terminal and the BLACK wire to the (-) terminal. Connect the RED
wire (with in- line fuse holder) to the accessory terminal on the ignition switch of
your vehicle. Make a good mechanical and electrical connection to the frame of the
vehicle for the black wire. You can use an auto accessory lighter plug, available on
the CB market, to connect your Transceiver to the vehicle’s cigarette lighter recep-
tacle. However, is better to connect the DC power cord directly to the accessory ter-
minal of the ignition switch. This will prevent unauthorized use of the transceiver,
and will also prevent you from leaving it on unintentionally. Before operation, you
must install and connect your antenna system. The lead from the antenna you’ve
installed should be connected to the antenna coaxial connector. If you are using an
external speaker, connect it to the EXT-SPKR jack.
REPLACING FUSE
If you replace the fuse for DC Power Cord, use 2 A type (one supplied as spare).
Hold the fuse holder and press on the inside, then rotate the holder.
CONNECTING THE MICROPHONE
Your transceiver has a new microphone con-
nector. This ensures that you won’t acciden-
tally pull out or loosen the plug connection
when moving the microphone cable out.
To connect the microphone plug: press the
small tab on the side and insert plug into jack,
taking care to align the plug and jack pro-
perly.
To release the microphone plug: press the
small tab on the side, then push the plug in to
release the lock and pull the plug out.
ANTENNA SYSTEM
A mobile antenna system is not limited to just the antenna. The transmission line as
well as the vehicle are important factors in the total antenna system. Therefore, you
must use the correct type of transmission line and mount the antenna securely in a
position that will give you optimal results. Use coaxial cable with an impedance of
50 Ohms. We suggest type RG 58/U for lengths under 2.5 m or RG 8/U for longer
lengths. Generally speaking, you should keep the length of the transmission line to
a minimum. The above discussion is as important for reception as for the trans-
mission. If a mismatch exists between the antenna and the receiver, the excellent
sensitivity and signal-to-noise radio of the receiver circuit will be defeated.
Suggestions
A few general rules should help you to install any mobile antenna properly.
• Keep it as far as possible from the main bulk of the vehicle.
• During operation, it must be vertical, and rigid enough to remain vertical when
the vehicle or boat is in motion.
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