21-1599.fm Page 1 Thursday, August 5, 1999 10:59 AM
Cat. No. 21-1599
OWNER’S MANUAL
Please read before using this equipment.
TRC-499
40-Channel 2-Way CB Radio
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FCC INFORMATION
The Federal Communications Com-
mission (FCC) does not require you
to have a license to operate this CB.
However, the FCC does require you
to read and know Part 95 of FCC
Rules. These rules apply to the oper-
ation of a Class D CB. We have pro-
vided a copy of these regulations
with your CB.
Your CB might cause TV or radio in-
terference even when it is operating
properly. To determine whether your
CB is causing the interference, turn
off your CB. If the interference goes
away, your CB is causing the interfer-
ence. Try to eliminate the interfer-
ence by:
• Moving your CB away from the
receiver.
Warning: Do not open your CB to
make any internal adjustments. Any
internal adjustments can be made
only by authorized service person-
nel.
• Contacting your local Radio
Shack store for help.
If you cannot eliminate the interfer-
ence, the FCC requires that you stop
using your CB.
Internal adjustments and/or modifi-
cations can lead to illegal operation
as defined by Part 95 of FCC Rules.
Such illegal operation can lead to
very serious consequences.
To be safe and sure:
• Never open your CB’s case.
• Never modify your CB.
3
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CONTENTS
Installation ....................................................................................................... 5
Mounting the Microphone Holder ............................................................... 5
Connecting the Microphone........................................................................ 5
Mounting the TRC-499 ................................................................................ 5
Installing an Antenna.................................................................................. 6
Selecting an Antenna............................................................................ 6
Connecting an Antenna ....................................................................... 7
Using Vehicle Battery Power ...................................................................... 7
Using the CB as a Base Station ................................................................. 7
Connecting an Optional External Speaker ................................................. 8
Operation ......................................................................................................... 9
Receiving Transmissions and Adjusting Squelch ....................................... 9
Transmitting ................................................................................................ 9
CB Operation Tips ..................................................................................... 10
Common Uses for a CB Radio............................................................ 10
CB Courtesy.........................................................................................11
Maximum Range..................................................................................11
Using Common 10-Codes................................................................... 12
Troubleshooting ............................................................................................ 13
Reducing Noise ........................................................................................ 14
Maintenance .................................................................................................. 15
Replacing the Fuse ................................................................................... 16
Specifications ................................................................................................ 17
4
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21-1599.fm Page 5 Thursday, August 5, 1999 10:59 AM
INSTALLATION
Caution: Never pull on the micro-
phone cable.
MOUNTING THE
MICROPHONE HOLDER
Using a Phillips screwdriver and the
supplied small screws and small
metal washers, attach the supplied
microphone holder horizontally or
vertically to either side of the CB.
MOUNTING THE
TRC-499
The most common mounting location
for this CB is under a vehicle’s dash-
board. However, if you use the TRC-
499 as a base station, you can place
it on a desk, shelf, or table (see “Us-
ing the CB as a Base Station”).
If you are mounting the CB in a vehi-
cle, choose a location where:
• You can easily reach the CB.
CONNECTING THE
MICROPHONE
• Wires and cables will not inter-
fere with the vehicle’s pedals or
other moving parts.
1. Insert the microphone’s plug into
the microphone jack until it
clicks.
• The CB is not directly in front of
heating vents.
• All wires and cables will reach
their connection points.
Cautions:
• The TRC-499 is designed to
work in a vehicle that has a 12-
volt DC, negative-ground electri-
cal system. Most vehicles have
this type of system. If you are
not sure about your vehicle,
check with your vehicle dealer.
Caution: The microphone’s plug
fits only one way into the micro-
phone jack. Do not force it.
2. Slide the microphone onto the
microphone holder.
To disconnect the microphone cable,
squeeze the bottom of the micro-
phone’s plug, then gently pull it out.
5
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• If you use the TRC-499 in a
vehicle, mount it securely to
avoid damage to the CB or vehi-
cle during sudden starts or
stops.
4. Attach the CB to the mounting
bracket using the rubber wash-
ers and mounting knobs.
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.
INSTALLING AN
ANTENNA
Caution: To prevent damage to your
CB, you must connect an antenna to
the CB before you operate it.
2. In each marked location, drill a
hole slightly smaller than the
supplied large screws.
Selecting an Antenna
Caution: Be careful not to drill
into anything behind the mount-
ing surface.
When deciding on a mobile or base-
station antenna and its location, con-
sider these points:
3. Using
a
Phillips screwdriver,
• The location of the antenna
should be as high as possible.
attach the mounting bracket to
the mounting surface with the
large screws and supplied lock
washers.
• The antenna and antenna cable
should be as far as possible
from sources of electrical noise
(ignition systems, gauges, etc.).
• The antenna should be vertical
for the best performance.
Your local Radio Shack store sells a
variety of CB antennas for both mo-
bile and base-station use. Choose
the one that best meets your needs.
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21-1599.fm Page 7 Thursday, August 5, 1999 10:59 AM
1. Connect the CB’s black wire to
your vehicle battery’s negative
Connecting an Antenna
Once you choose an antenna, follow
the mounting instructions supplied
with it. Then route the antenna cable
to the CB and connect the cable to
the ANTENNA jack on the back of the
CB.
( ) terminal or to a metal part of
–
the vehicle’s frame that is not
insulated from the frame by a
plastic part.
2. Connect the CB’s red wire, with
in-line fuse, to a source of volt-
age that turns on and off with the
ignition switch, such as a spare
accessory terminal in your vehi-
cle’s fuse box.
Cautions:
• Do not run the cable over sharp
edges or moving parts.
• Do not run the cable next to
power cables or other CB
antenna cables.
• Do not run the cable through a
vehicle’s engine compartment or
other areas that produce
extreme heat.
USING THE CB AS A
BASE STATION
Although this CB is designed for mo-
bile use, you can also use it as a
base station. To do so, you need the
following items.
USING VEHICLE
BATTERY POWER
• 12-volt DC power supply (such
as Cat. No. 22-120)
You can power this CB from your ve-
hicle’s battery or from standard AC
power with an optional DC power
supply. For information on using AC
power, see “Using the CB as a Base
Station.”
Caution: Most 12-volt DC power
supplies plug into a standard AC
outlet to produce DC power.
Before connecting your CB to a
12-volt DC power supply, read
and follow the instructions pro-
vided with the power supply.
Follow these steps to power the CB
from your vehicle’s battery.
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21-1599.fm Page 8 Thursday, August 5, 1999 10:59 AM
• Base station antenna (such as
Cat. No. 21-967)
4. Connect the CB’s red wire, with
in-line fuse, to the DC power
supply’s positive (+) terminal.
• Coaxial antenna cable and con-
nectors
Note: Your local Radio Shack store
carries power supplies, antennas,
coaxial antenna cable, and connec-
tors.
Follow these steps to install the CB
as a base station.
1. Mount the base station antenna
as described in its owner’s man-
ual.
5. Plug the DC power supply into a
standard AC outlet.
Warning: Use extreme caution
when you install or remove a
base station CB antenna. If the
antenna starts to fall, let it go! It
could contact overhead power
lines. If the antenna touches the
power line, contact with the
antenna, mast, cable, or guy
wires can cause electrocution
and death. Call the power com-
pany to remove the antenna. DO
NOT attempt to do so yourself.
CONNECTING AN
OPTIONAL EXTERNAL
SPEAKER
To make the CB easier to hear in
noisy environments, you can connect
it to an external CB speaker. Use an
8-ohm speaker capable of handling 3
to 5 watts of power (such as Radio
Shack Cat. No. 21-549). The speak-
er’s cable must have a1/8-inch plug.
2. Connect the antenna’s cable to
Simply plug the speaker cable into
ANTENNA
the
of the CB.
jack on the back
EXT8
the CB’s
Ω jack.
3. Connect the CB’s black wire to
the DC power supply’s negative
Note: When you connect an external
speaker, the CB’s internal speaker
automatically disconnects.
( ) terminal.
–
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OPERATION
Before you start using your CB, you
should know how to use it effectively
and courteously. “CB Operation
Tips” contains information that will
help you use and enjoy your CB.
Note: If the CB picks up
unwanted, partial, or very weak
transmissions, turn SQUELCH
clockwise to decrease the CB’s
sensitivity to these signals. If
you want to listen to a weak or
distant station, turn SQUELCH
counterclockwise.
RECEIVING
TRANSMISSIONS AND
ADJUSTING SQUELCH
4. Adjust VOLUME to a comfortable
listening level.
5. Press DOWN to select lower
channels or UP to select higher
channels. The channel number
appears on the display.
Caution: Do not attempt to use your
CB without first connecting an anten-
na to it.
1. Turn SQUELCH fully counter-
clockwise.
Important! Channel
9
is
reserved for motorist assistance
and for reporting emergency
information about accidents,
hazardous road conditions, and
so on. Always give emergency
messages priority on Channel 9.
2. To turn on the CB, turn VOLUME
clockwise until you hear it click
and you hear a hissing sound.
The CB displays a channel num-
ber.
6. To turn off the TRC-499, turn
VOLUME counterclockwise until
you hear it click.
TRANSMITTING
Note: We recommend you try receiv-
ing transmissions before you trans-
mit.
3. Turn SQUELCH clockwise until
the hissing sound stops.
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21-1599.fm Page 10 Thursday, August 5, 1999 10:59 AM
1. Follow Steps 1-5 under “Receiv-
ing Transmissions and Adjusting
Squelch.”
Common Uses for a CB
Radio
Business Uses
2. Hold the microphone 2 or 3
inches from your mouth. Then
press and hold down the micro-
phone talk button and speak into
the microphone in a normal
voice. The TX indicator turns on.
• Truck drivers and delivery per-
sonnel can learn road and traffic
conditions and get assistance in
locating destinations. A CB is
also good company on those
“long hauls.”
• On construction crews, a CB
quickly pays for itself when you
are calling for additional materi-
als or coordinating the activities
of different work crews.
• For security officers, a CB is
Note: Do not speak too loudly
when transmitting. It does not
make your signal any stronger,
and might distort your transmis-
sion.
more than a convenience it is
–
a must for both safety and effi-
ciency.
Personal Uses
3. When you finish transmitting,
release the microphone talk but-
ton. The TX indicator turns off.
You can now receive transmis-
sions.
• Keep in touch with home while
driving to work, to the store, or to
a social activity. Let your family
know you are tied up in traffic or
that you will stop by the store on
the way home.
4. To turn off the TRC-499, turn
VOLUME
counterclockwise until
• If you are a two-car (or more)
family, CBs are great for com-
municating with family members
while they are in their cars.
you hear it click.
CB OPERATION TIPS
• Contact friends or neighbors
find out “what’s happening” or
plan a get-together.
–
Like most activities, CB radio has its
customs and courtesies. The follow-
ing tips will help you get the most en-
joyment from your CB.
• Ever have car trouble or run out
of gas on the highway? What an
10
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21-1599.fm Page 11 Thursday, August 5, 1999 10:59 AM
assurance it is to be able to
radio for assistance!
Maximum Range
The maximum range and quality of
CB transmissions vary depending on
these conditions:
• Camping, fishing, and other
sports are more fun with a CB.
Locate a buddy or find out
“what’s cooking” back at camp.
• The type and quality of antenna
used.
• The height of the antenna’s
CB Courtesy
mounting location
the antenna, the better the sig-
nal’s range.
the higher
–
• Wait for a pause in someone
else’s transmission before you
ask for a break.
• The surrounding terrain
mountains and tall buildings limit
the range.
–
• If you do not receive an answer
to your call after a second
attempt, sign off and wait sev-
eral minutes before trying again.
• Weather conditions.
• The number of nearby CBs
operating on the same channel.
• Do not hold down the micro-
phone talk button when you are
not talking. (This is called dead
keying.)
• Standing wave ratio (SWR)
between the antenna and the
CB. You can check the SWR
between the CB and a mobile or
base-station antenna using an
SWR tester (Cat. No. 21-523).
Follow the instructions supplied
with the SWR tester and the
mobile or base-station antenna
to change the SWR, if neces-
sary.
• Assist callers with directions,
information about road condi-
tions, and any other reasonable
requests.
11
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Using Common 10-Codes
Code
Meaning
Information.
Citizen’s band operators have largely
adopted the 10-codes for standard
questions and answers. These
codes permit faster communication
and better intelligibility in noisy ar-
eas.
10-14
10-15
10-16
10-17
10-18
10-19
10-20
10-21
Message delivered.
Reply to message.
En route.
Urgent.
This table lists the codes adopted by
the Associated Public Safety Com-
munications Officers (APCO).
Contact ____________.
What is your location?
Code
10-1
Meaning
Call ___________ by tele-
phone.
Cannot understand your
message.
10-22
10-23
10-24
10-26
Cancel last message.
Arrived at the scene.
Assignment complete.
10-2
10-3
10-4
Your signal is good.
Stop transmitting.
Estimated time of arrival is
____________________.
Message received and
understood.
10-30
10-31
10-33
Use caution.
Pick up.
10-5
10-6
Relay information to
________________.
I am busy or are you
busy?
Emergency traffic. Clear
the channel.
10-7
Out of service.
10-34
What time is it?
10-8
In service.
10-9
Repeat last message.
Negative (No).
10-10
10-11
10-12
10-13
____________ in service.
Stand by.
Report ____________
conditions.
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21-1599.fm Page 13 Thursday, August 5, 1999 10:59 AM
TROUBLESHOOTING
If your CB is not working as it should, follow the suggestions below to see if you
can eliminate the problem. If you cannot, take the CB to your local Radio Shack
store for assistance.
Symptom
Check That:
• The CB is turned on.
Trouble with reception
• VOLUME is turned up.
• SQUELCH is adjusted properly.
• The microphone is securely connected to the
CB.
• The antenna cable is securely connected to
both the antenna and the CB.
Trouble with transmis-
sion
• The CB is turned on.
• The microphone is securely connected to the
CB.
• All connectors are clean and tightened.
• The antenna cable is securely connected to
both the antenna and the CB.
• You are fully pressing the microphone talk but-
ton.
CB does not work at all The power supply (either vehicle or 12V DC) and
in-line fuse (replace only with an identical 2-amp
fuse) are working; see “Replacing the Fuse.”
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21-1599.fm Page 14 Thursday, August 5, 1999 10:59 AM
Your local Radio Shack store has a
wide selection of noise-suppression
accessories.
REDUCING NOISE
The Automatic Noise Limiting (ANL)
circuit helps keep background noise
to a minimum. However, strong
sources of electrical noise (such as
your vehicle’s ignition, another radio,
or spark plugs) might be more than
the circuit can compensate for.
If you operate the TRC-499 with a ve-
hicle’s engine off, you should not
have any problems with noise. If you
use the CB with the engine on, you
can determine the source of the
noise by turning off the engine and
operating the CB with the ignition set
to ACC. If most or all of the noise
goes away, the problem is in your ve-
hicle’s ignition or electrical system.
Here are a few hints to help you re-
duce or eliminate such noise:
• Replace old ignition wires with
new, high-voltage, noise-sup-
pression wires.
• Install noise suppressors on
your spark plugs, or install new
spark plugs that have built-in
suppressors.
• Be sure that the ground connec-
tion (black wire) is secure.
If problems persist, check your alter-
nator/generator, regulator, and gaug-
es. Noise from these sources can be
reduced or eliminated using bypass
capacitors at various output voltage
points.
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21-1599.fm Page 15 Thursday, August 5, 1999 10:59 AM
MAINTENANCE
Your TRC-499 40-Channel 2-Way CB Radio is an example of superior design
and craftsmanship. The following suggestions will help you care for your CB so
you can enjoy it for years.
Keep the CB dry. If it gets wet, wipe it dry immediately. Liquids
might contain minerals that can corrode the electronic circuits.
Handle the CB gently and carefully. Dropping it can damage cir-
cuit boards and cases and can cause the CB to work improperly.
Keep the CB away from dust and dirt, which can cause premature
wear of parts.
Wipe the CB with a damp cloth occasionally to keep it looking
CLEANER
new. Do not use harsh chemicals, cleaning solvents, or strong de-
tergents to clean the CB.
Modifying or tampering with the CB’s internal components can cause a malfunc-
tion and might invalidate your CB’s warranty and void your FCC authorization to
operate it. If your CB is not performing as it should, take it to your local Radio
Shack store for assistance.
15
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21-1599.fm Page 16 Thursday, August 5, 1999 10:59 AM
REPLACING THE FUSE
The TRC-499’s 2-amp fuse helps
protect your CB from power surges
and short circuits. If the fuse is blown,
replace it with a 2-amp, fast-acting
glass fuse (Cat. No. 270-1007).
Follow these steps to replace the
fuse.
1. Make sure the power source
and CB are both turned off.
2. To open the fuse holder, push
the fuse holder ends together,
then turn either end counter-
clockwise and release it.
3. If the fuse is blown, replace it.
Caution: Make sure you replace
the fuse only with another fuse
of the same type and rating.
4. To close the fuse holder, push
the fuse holder ends together,
then turn either end clockwise.
16
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21-1599.fm Page 17 Thursday, August 5, 1999 10:59 AM
SPECIFICATIONS
RECEIVER
Frequency Coverage............................................ All 40 CB Channels (Class D)
26.965 to 27.405 MHz
Sensitivity ..................................................... 0.7 µV or better for 10 dB (S+N)/N
Adjacent Channel Rejection........................................................................55dB
Audio Output .........................................................................3 Watts (Minimum)
Frequency Response ..................................................... 6 dB (at 450-2500 Hz)
-
Intermediate Frequency ............................................................1st 10.695 MHz,
2nd 455 kHz
Cross Modulation .......................................................................................50dB
Squelch ............................................................ Adjustable from 0 5 µV to 1 mV
.
TRANSMITTER
Frequency Coverage.............................................All 40 CB Channels (Class D)
26.965 to 27.405 MHz
Output Power ............................................................... 4 Watts (FCC Maximum)
Type of Modulation...................... AM Double Sideband, Full Carrier Modulation
Modulation Capability................................................................................ ± 90%
Spurious Emission.................................................................................... 60 dB
-
Frequency Tolerance.............................................................................±±200 Hz
Antenna Impedance ............................................................................... 50 Ohm
Current Drain (13.8 volt supply) ................................ 1 Amp with No Modulation
1.5 Amps with 80% Modulation
GENERAL
Power Requirements ........................................13.8 Volts DC, Negative Ground
Dimensions......................................................... 13/8 x 49/16 x 61/4 Inches (HWD)
(47 x 150 x 202 mm)
Weight ......................................................................................................13/4 lbs
Specifications are typical; individual units might vary. Specifications are subject
to change and improvement without notice.
17
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21-1599.fm Page 18 Thursday, August 5, 1999 10:59 AM
NOTES
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21-1599.fm Page 19 Thursday, August 5, 1999 10:59 AM
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21-1599.fm Page 20 Thursday, August 5, 1999 10:59 AM
RADIO SHACK LIMITED WARRANTY
This product is warranted against defects for 90 days from date of pur-
chase from Radio Shack company-owned stores and authorized Radio
Shack franchisees and dealers. Within this period, we will repair it with-
bring your Radio Shack sales
out charge for parts and labor. Simply
slip
as proof of purchase date to any Radio Shack store. Warranty does
not cover transportation costs. Nor does it cover a product subjected to
misuse or accidental damage.
EXCEPT AS PROVIDED HEREIN, RADIO SHACK MAKES NO
EXPRESS WARRANTIES AND ANY IMPLIED WARRANTIES ARE LIM-
ITED IN DURATION TO THE DURATION OF THE WRITTEN LIMITED
WARRANTIES CONTAINED HEREIN. Some states do not permit limita-
tion or exclusion of implied warranties; therefore, the aforesaid limita-
tion(s) or exclusion(s) may not apply to the purchaser.
This warranty gives you specific legal rights and you may also have other rights which vary
from state to state.
We Service What We Sell
9/94
RADIO SHACK
A Division of Tandy Corporation
Fort Worth, Texas 76102
3A5
Printed in Thailand
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