Tandy TRC-502 Owner's Manual
Cat. No. 21-1702
OWNER’S MANUAL
Please read before using this equipment.
TRC-502
40-Channel Mini Mobile CB Radio
A
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FEATURES
Your RadioShack TRC-502 40-Channel
Mini Mobile CB Radio is a great way to
communicate with other CB radio operators. Because of its convenient compa ct
size, you can use it just ab out a nyw here .
You can mount it in a vehicle for mo bile
use, or in your home or office for us e as
a base station.
Your CB has these advanced features.
Up/Down Channel Selector
— lets you
easily select a channel with the press of
a button.
TX (Transmit) Indicator
— lights to
show when the CB is transmitting.
Automatic Noise Limiter (ANL) Circuit
— reduces impulse-type noise during
reception.
5-Pin Din Mic Connector
— uses five
prongs to reinforce a clear connection
between the mic and the receiver.
Full Legal Power
— gives you the full
range of CB channels with the maximum
allowed transmit power.
Adjustable Squelch
— helps to elimi-
nate noise between transmissions.
Automatic Modulation
— prevents the
transmitter signal from over-modulating
and distorting.
(PLL) Frequency Synthesizer
— pro-
vides highly accurate and stable tuning.
Crystal-Controlled Digital Tuning
—
provides precise transmission tuning capability when selecting a channel.
Two Ceramic Filters
— provide superior channel selectivity and prevent adjacent channel interference.
Universal Mounting Bracket
— lets
you mount your CB securely in your vehicle, or on a table or shelf in your home
or office.
External Antenna Jack
— lets you attach an optional antenna to your CB radio for increased range.
© 1999 Tandy Corporation.
All Rights Reserved.
RadioShack is a registered trademark used by Tandy Corporation.
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FCC INFORMATION
The Federal Communications Commission (FCC) does not require you to have
a license to operate this CB radio. However, you must know Part 95 of
FCC
Rules
. These rules apply to the operation of a Class D CB. We have provided
a copy of these regulations with your CB
radio.
Warning
: Do not open your CB radio to
make any internal adjustments. A CB radio is set up to transmit a regulated sig nal on an assigned frequency. It is
against the law to alter or adjust the s et tings inside the unit to exceed these limitations.
To be safe and sure:
• never open your CB radio’s cases.
• never change or replace anything in
your CB radio.
Your CB radio might cause TV or radio
interference even when it is op erating
properly. To determine whether your CB
radio is causing the interference, turn off
your CB radio. If the interference goe s
away, your CB is causing it. Try to eliminate the interference by:
• moving your CB radio away from the
TV or radio
• contacting your local RadioShack
store for help
If you cannot eliminate the interference,
the FCC requires that you stop using
your CB radio.
This device complies with Part 95 of
FCC Rules
. Operation is subject to the
following two conditions: 1) this devi ce
may not cause harmful interference, and
2) this device must accept any interference received, including interference
that may cause undesired operation.
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CONTENTS
Installation ..................................................................... .......................................... 5
Mounting the Microphone Holder ....................................................................... 5
Mounting the CB ................................................................................................. 5
Connecting an Antenna ...................................................................................... 6
Connecting the Microphone ................................................................................ 7
Using Vehicle Battery Power .............................................................................. 8
Using the CB as a Base Station ......................................................................... 8
Operation ....................................................................... ........................................ 10
Receiving Transmissions and Adjusting Squelch ............................................. 10
Transmitting .............................................................. ........................................ 11
Operational Hints .................................................................................................. 12
Common Uses for a CB .................................................................................... 12
Personal Uses ............................................................................................ 12
Business Uses ........................................................................................... 12
Transmission Courtesy ................................................................................... .. 12
Using Common 10-Codes ................................................................................ 13
Maximum Range .............................................................................................. 14
Reducing Noise ................................................................................................ 14
Troubleshooting .................................................................................................... 15
Care and Maintenance .......................................................................................... 16
Replacing the Fuse ........................................................................................... 17
Specifications ................................................................ .......................... .............. 18
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INSTALLATION
MOUNTING THE
MICROPHONE HOLDER
You can mount the microphone holder
to either side of the CB or to another lo cation near your receiver.
Caution
: Do not mount the CB microphone holder where it could damage or
interfere with the operation of any passive restraint safety device (an airbag o r
seat belt).
To mount the holder to either side of the
CB, use the two supplied
1
/8-inch (3-mm)
tapered-tip screws, plain washers, and
spring washers as shown to secure the
holder.
To mount the holder near the receiver in
another location in your vehicle (such as
a dashboard), or somewhere in your
home or office, such as a nearby wall,
follow these steps.
1. Using the holder as a template,
mark the positions for the screw
holes at the desired location.
2. At e ach mar ked position, dr ill a ho le
slightly smaller than the mounting
screws.
Caution
: Be careful not to dril l into
anything behind the mounting surface.
3. M ount the holde r using the m achine
screws, spring washers, plain washers and nuts.
Note
: If you cannot reach behind the
mounting surface to attach the nuts to
the machine screws, use the two supplied
1
/8-inch (3-mm) tapered-tip screws
and plain washers.
MOUNTING THE CB
The most common mounting location for
this CB is under a vehicle’s dashboa rd.
However, if you use the TRC-502 as a
base station in your home or office, yo u
can place it on a desk, shelf, or table
(see “Using the CB as a Base Station”
on Page 8).
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 and other moving
parts.
Mounting Surface
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• the CB is not directly in front of heating vents.
• all wires and cables can reach their
connection point.
Cautions
:
• If you use the CB in a vehicle, mount
it securely to avoid damage to the
CB or vehicle or injury to pa ssengers.
• Do not mount the CB where it could
damage or interfere with the operation of any passive restraint safety
device (an airbag or seatbelt).
Follow these steps to mount the CB using the supplied hardware.
1. Using the mounting bracket as a
template, mark the positions for the
screw holes on the mounting surface.
2. In each mar ked location, drill a hole
slightly smaller than the two
1
/5-inch
(5-mm) mounting screws.
Caution
: Be careful not to drill into
objects behind the mounting surface.
3. M ount the bracket to the mounting
surface with the
1
/5-inch (5-mm)
mounting screws, spring washers,
plain washers, and nuts.
Note
: If you cannot reach behind the
mounting surface to attach the nuts
on the bolts, use the
1
/5-inch (5-mm)
mounting screws and plain washers
to secure the bracket.
4. Attach the CB to the mounting
bracket using the two rubber washers and mounting knobs.
CONNECTING AN
ANTENNA
There are many different types of antennas for mobile CBs, each with its own
benefits. You can choose one that best
fits your needs. Your local RadioS hack
store sells a wide variety of antennas.
Note
: If you are using this CB as a base
station, see “Using the CB as a Base
Station” on Page 8.
Mounting
Surface
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