Radio Shack 21-1703 A User Manual
21-1703 A
Mini Mobile CB Radio
Thank you for purchasing your Mini Mobile CB Radio from RadioShack.
Please read this user’s guide before installing, setting up and using your new
product.
What’s Included
CB Radio
Microphone
Holder
Mounting Bracket
5mm Machine Screw (2)
3mm Machine Screw (2)
5mm Self-tapping Screw (2)
3mm Self-tapping Screw (2)
Spring Washer (2 big + 4 small)
Plain Washer (2 big + 4 small)
Nut (2 big + 2 small)
Mounting Knob (2)
Rubber Washer (2)
User’s Guide
C
ontents
Product Features......................................................................... 3
Setup.......................................................................................... 4
Attaching the Microphone Holder.....................................................4
Mounting the Transceiver...................................................................5
Connecting an Antenna......................................................................6
Connecting the Microphone..............................................................7
Connecting an External Speaker......................................................7
Using Vehicle Battery Power..............................................................8
Using the Transceiver...............................................................................8
Operation.................................................................................... 9
Receiving Transmissions and Adjusting Squelch...........................9
Transmitting.........................................................................................9
Selecting the Emergency Channel...................................................9
Operational Hints.............................................................................10
Common Uses for CB Radios
Transmission Courtesy ............................................................................10
.................................................................10
Using Common 10-Codes...............................................................10
Maximum Range..............................................................................11
Additional Information............................................................... 12
Troubleshooting................................................................................12
Reducing Noise................................................................................12
Care and Service..............................................................................13
Replacing the Fuse..........................................................................13
6SHFLÀFDWLRQV ...................................................................................14
RF Emissions Information.............................................................. 15
Limited Warranty............................................................................. 16
2
Product Features
Product Features
Push to Talk (PTT)
Microphone
Channel Display
Shows the current
channel.
CHANNEL
Rotate to select
frequency.
VOLUME
Rotate to increase or
decrease the speaker
volume.
TX / RX
Shows when the radio
is transmitting (TX), or
receiving (RX).
OUT CH9 CH19
Switch to move between standard
frequencies and emergency channels.
SQUELCH
Rotate to adjust the amount of
background noise.
Other Features
Full Legal Power – gives you the greatest available range.
Automatic Noise Limiter – reduces impulse-type noises while receiving.
External Speaker Jack – provides a connection for an external speaker.
Phase-Locked Loop (PLL) Frequency Synthesizer – provides highly accurate and
stable tuning.
Two Built-In Ceramic Filters – ensure superior channel selectivity and freedom
from adjacent channel interference.
Automatic Modulation Control – prevents the transmitter signal from overmodulating and distorting.
3
Setup
Setup
Attaching the Microphone Holder
You can attach the microphone holder to either side of the transceiver or to
another location in your vehicle.
To attach the holder to either side of the transceiver, secure the holder to the
side using the supplied 3mm self-tapping screws, and spring washers.
Holder
Spring washer
3mm self-tapping
screw
To attach the holder to another location in the vehicle, such as the dashboard,
follow these steps.
1. Using the holder as a template, mark the positions for the mounting screw
holes at the desired location.
2. At each marked position, drill a hole slightly smaller than the supplied
mounting screws.
3. Attach the holder at the mounting location using the supplied 3mm
machine screws, spring washers, plain washers, and nuts.
Note: If you cannot reach behind the mounting surface to attach the nuts on
the machine screws, use the supplied 3mm plain washers and self-tapping
screws.
4
Setup
Mounting the Transceiver
Cautions:
• If you use this CB in a vehicle, mount it securely to avoid damage to the CB
or vehicle, or injury to anyone in the vehicle during sudden starts or stops.
• Do not mount the CB where it could damage or interfere with the
operation of any passive restraint safety device (an airbag or seat belt).
• Be careful not to drill into objects behind the mounting surface.
If you are mounting the CB in a vehicle, choose a location where:
• You can easily reach the CB.
• Wires and cables are clear of the vehicle’s pedals or other moving parts.
• The CB is not directly in front of heating vents.
• All wires and cables can reach their connection points.
The most common mounting location for this CB is under the vehicle’s
dashboard. However, if you plan to use the CB as a base station, you can place it
on a desk, shelf, or table (see “Using the Transceiver” on p.8).
To mount the CB under your dashboard:
1. Using the supplied mounting bracket as a template, mark the positions for
the screw holes on the mounting surface.
2. At each marked location, drill a hole slightly smaller than the supplied
mounting screws.
3. Mount the bracket to the mounting surface with the supplied 5mm machine
screws, spring washers, plain washers, and nuts.
4. Attach the CB to the bracket using the supplied rubber washers and
mounting knobs.
Note: If you cannot reach behind the mounting surface to attach the nuts on
the machine screws, use the 5mm self-tapping screws and plain washers to
secure the bracket.
Mounting bracket
Mounting knob
5
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