Samsung Weather Radio TRC 445 User Guide

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Cat. No. 21-1573  
OWNER’S MANUAL  
Please read before using this equipment.  
TRC-445  
Deluxe 40-Channel Mobile CB Radio  
with Weather Alert  
 
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WX/Alert Indicator — shows the CB is  
ready to receive a weather alert signal.  
Warning: Do not open your CB to make  
any internal adjustments. Any internal  
adjustments can be made only by an au-  
thorized service technician.  
RX/TX Indicator — shows whether the  
CB is transmitting or receiving.  
Internal adjustments and/or modifica-  
tions can lead to illegal operation as de-  
fined by Part 95 of FCC Rules. Such  
illegal operation can lead to very serious  
consequences.  
S/RF/SWR/CAL Switch — lets you  
quickly select the display for the RF/sig-  
nal meter (radio input/output signal pow-  
er strength, standing wave ratio of the  
antenna, or SWR calibration).  
To be safe and sure:  
Universal Mounting Bracket — lets  
you mount your CB securely in your ve-  
hicle or on a desk or table in your home.  
• Never open your CB’s case.  
• Never modify your CB.  
Note: To use this CB, you need a mobile  
or base station antenna. Your local Ra-  
dioShack store has a wide variety of an-  
tennas. For more information, see  
“Installing an Antenna” on Page 6.  
Your CB might cause TV or radio inter-  
ference even when it is operating prop-  
erly. To determine whether your CB is  
causing the interference, turn off your  
CB. If the interference goes away, your  
CB is causing it. Try to eliminate the in-  
terference by:  
We recommend you record your CB’s  
serial number here. The number is on  
the CB’s back panel.  
• Moving your CB away from the  
receiver  
Serial Number___________  
• Contacting your local RadioShack  
store for help  
If you cannot eliminate the interference,  
the FCC requires that you stop using  
your CB.  
FCC INFORMATION  
The Federal Communications Commis-  
sion (FCC) does not require you to have  
a license to operate this CB. However,  
the FCC does require that you read and  
know Part 95 of FCC Rules. These rules  
apply to the operation of a Class D CB.  
We have provided a copy of these regu-  
lations with your CB.  
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CONTENTS  
Installation ............................................................................................................... 5  
Mounting the Microphone Holder ....................................................................... 5  
Mounting the TRC-445 ....................................................................................... 5  
Connecting the Microphone ................................................................................ 6  
Installing an Antenna .......................................................................................... 6  
Selecting an Antenna ................................................................................... 6  
Connecting an Antenna ............................................................................... 7  
Using Vehicle Battery Power .............................................................................. 7  
Using the CB as a Base Station ......................................................................... 8  
Connecting Optional External Speakers ............................................................. 9  
External CB Speaker ................................................................................... 9  
Public Address Speaker ............................................................................... 9  
Adjusting the Standing Wave Ratio .................................................................... 10  
Standing Wave Ratio Chart .............................................................................. 11  
Operation ............................................................................................................... 12  
Turning On the CB and Receiving Transmissions ............................................ 12  
Transmitting ...................................................................................................... 13  
Listening to Weather Broadcasts ...................................................................... 14  
Weather Alert ............................................................................................. 15  
Using the Public Address Function ................................................................... 15  
CB Operation Tips ................................................................................................. 16  
Common Uses for a CB Radio ......................................................................... 16  
Business Uses ........................................................................................... 16  
Personal Uses ............................................................................................ 16  
CB Courtesy ..................................................................................................... 16  
Using Common 10-Codes ................................................................................ 17  
Maximum Range .............................................................................................. 18  
Reducing Noise ................................................................................................ 18  
Troubleshooting .................................................................................................... 19  
Care and Maintenance .......................................................................................... 20  
Replacing the Fuses ......................................................................................... 21  
Specifications ........................................................................................................ 22  
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INSTALLATION  
Cautions:  
MOUNTING THE  
• If you use the TRC-445 in a vehicle,  
mount it securely to avoid damage  
to the CB or vehicle or injury to any-  
one in the vehicle during sudden  
starts or stops.  
MICROPHONE HOLDER  
Using a Phillips screwdriver and the  
supplied screws and washers, attach  
the supplied microphone holder to the  
CB’s left or right side either horizontally  
or vertically.  
• Do not mount the CB where it could  
damage or interfere with the proper  
operation of any passive restraint  
safety device (an air bag or seat  
belt).  
Illustration  
Star Lock Washer (2)  
Small Screws (2)  
Follow these steps to mount the CB us-  
ing the supplied hardware.  
1. Using the slots in the mounting  
bracket as a template, mark the  
positions for the screw holes.  
MOUNTING THE TRC-445  
The most common mounting location for  
this CB is under a vehicle’s dashboard.  
However, if you use the TRC-445 as a  
base station, you can place it on a desk,  
shelf, or table (see “Using the CB as a  
Base Station” on Page 8).  
2. In each marked location, drill a hole  
slightly smaller than the supplied  
mounting screws.  
Caution: Be careful not to drill into  
anything behind the mounting sur-  
face.  
If you are mounting the CB in a vehicle,  
choose a location where:  
3. Using a Phillips screwdriver, attach  
the mounting bracket to the mount-  
ing surface with the large mounting  
screws and star lock washers.  
• You can easily reach the CB.  
• Wires and cables are clear of the  
vehicle’s pedals or other moving  
parts.  
Illustration  
Star Lock Washer (2)  
Mounting Screws (3)  
• The CB is not directly in front of  
heating vents.  
• All wires and cables can reach their  
connection points.  
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4. Attach the CB to the mounting  
bracket using the rubber washers  
and mounting knobs.  
To disconnect the microphone, unscrew  
the locking nut and gently pull out the  
microphone plug.  
Illustration  
Mounting Knobs (2)  
Rubber Washers (2)  
Caution: Never pull on the microphone  
cable.  
INSTALLING AN  
ANTENNA  
CONNECTING THE  
MICROPHONE  
Caution: To prevent damage to your  
CB, you must connect an antenna to it  
before you operate it.  
1. Align the slot on top of the micro-  
phone’s plug with the ridge inside  
Selecting an Antenna  
MIC  
the  
jack. Then fully insert the  
plug into the jack.  
When deciding on an antenna and its lo-  
cation, consider these points:  
Illustration  
• The location of the antenna should  
be as high as possible.  
• The antenna and antenna cable  
should be as far as possible from  
sources of electrical noise (ignition  
systems, gauges, and so on).  
2. Turn the plug’s locking nut clockwise  
to tighten it.  
Your local RadioShack store sells a vari-  
ety of CB antennas for both mobile and  
base-station use. Choose the one that  
best meets your needs.  
3. Slide the microphone onto the  
microphone holder.  
Illustration  
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Follow these steps to power the CB from  
your vehicle’s battery.  
Connecting an Antenna  
Once you choose an antenna, follow the  
mounting instructions supplied with the  
antenna. Route the antenna cable to the  
CB, then screw the cable into the AN-  
TENNA jack on the back of the CB.  
Illustration  
Red Wire  
Orange Wire  
Black Wire  
Illustration  
1. Plug the single connector end of the  
power cord into the POWER 13.8V  
DC jack on the CB’s back panel.  
2. Connect the black wire to your vehi-  
cle battery’s negative (–) terminal or  
to a metal part of the vehicle’s frame  
that is not insulated from the frame  
by a plastic part.  
Cautions:  
• Do not run the cable over sharp  
edges or moving parts that might  
damage it.  
3. Connect the red wire, with in-line  
fuse, to a source of voltage that  
turns on and off with the ignition  
switch, such as a spare accessory  
terminal in your vehicle’s fuse box.  
This prevents the battery from being  
drained if you leave the CB on when  
you turn off the ignition.  
• Do not run the cable next to power  
cables or other CB antenna cables.  
• Do not run the cable through a vehi-  
cle’s engine compartment or other  
areas that produce extreme heat.  
USING VEHICLE BATTERY  
POWER  
4. Connect the orange wire, with in-line  
fuse, to a source of voltage that sup-  
plies constant positive (+) power, or  
directly to your vehicle’s positive (+)  
battery terminal. This enables the  
radio to “remember” the last channel  
you tuned to when you turn the radio  
back on.  
You can power this CB from your vehi-  
cle’s battery or from standard AC power  
with an optional DC power supply. For  
information on using AC power, see “Us-  
ing the CB as a Base Station.”  
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1. Mount the base station antenna as  
described in its owner’s manual.  
USING THE CB AS A  
BASE STATION  
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 company to  
remove the antenna. DO NOT  
attempt to do so yourself.  
Although this CB is designed for mobile  
use, you can also use it as a base sta-  
tion. For base-station installation, you  
need the following items.  
• 12-volt DC power supply (such as  
Cat. No. 22-504)  
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 included with the power  
supply.  
2. Route the antenna cable to the CB,  
then connect the cable to the  
ANTENNA  
jack on the back of the  
CB.  
• Base station antenna (such as Cat.  
No. 21-921)  
3. Plug the single connector end of the  
POWER 13.8V  
power cord into the  
• Coaxial antenna cable and connec-  
tors  
DC jack on the CB’s back panel.  
4. Connect the black wire to the DC  
power supply’s negative (–) termi-  
nal.  
Note: Your local RadioShack store  
carries coaxial antenna cable and  
connectors.  
5. Connect the red wire and orange  
wire, with in-line fuses, to the DC  
power supply’s positive(+) terminal.  
Follow these steps to install the CB as a  
base station.  
Note: When you turn off the DC power  
supply, the CB “remembers” the last  
channel you tuned for only a few min-  
utes. After that, when you turn on the  
DC power supply again, the radio auto-  
matically selects Channel 9.  
Illustration  
Red Wire  
Orange Wire  
Black Wire  
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Public Address Speaker  
CONNECTING OPTIONAL  
EXTERNAL SPEAKERS  
To connect a PA speaker to the CB, use  
an 8-ohm speaker cable capable of han-  
dling 5 or more watts of power (such as  
Cat. No. 40-1235 or 40-1236). Plug the  
You can connect your CB to an external  
CB speaker and  
speaker.  
a
public-address  
1
speaker cable’s /8-inch plug into the  
PA SP  
CB’s  
jack.  
Note: When you connect an external or  
PA speaker, the CB’s internal speaker  
automatically disconnects.  
Illustration  
External CB Speaker  
To connect an external CB speaker, use  
an 8-ohm speaker capable of handling  
3–10 watts of power (such as Cat. No.  
To use the CB as a PA system, see “Us-  
ing the Public Address Function” on  
Page 15.  
21-549). Simply plug the speaker ca-  
1
EXT SP  
ble’s /8-inch plug into the CB’s  
jack.  
Illustration  
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ADJUSTING THE STANDING WAVE RATIO  
Most antennas are factory tuned. How-  
ever, you can usually improve radio per-  
formance by tuning your antenna  
system to the CB’s RF output power us-  
ing the SWR meter on this radio.  
3. Hold down the microphone’s talk  
button and adjust SWR CAL so the  
SWR/RF/signal meter’s needle  
points to CAL (on the top SWR  
t
scale).  
Once you have installed the antenna ac-  
cording to its instructions, follow these  
steps to adjust the standing wave ratio  
to your equipment.  
Illustration  
Figure 13 and  
Figure 19  
Note: You cannot change the SWR on  
some mobile and base-station anten-  
nas.  
1. Turn on the CB by turning OFF/VOL-  
UME clockwise until it clicks.  
4. Release the microphone’s talk but-  
ton.  
Illustration  
Figure 13  
5. Set S/RF/SWR/CAL to SWR.  
6. Press the microphone’s talk button  
again and read the meter’s needle  
on the top SWR scale for the  
antenna’s actual SWR measure-  
ment. Refer to the Standing Wave  
Ratio Chart on Page 11 to interpret  
the SWR meter readings.  
2. Set S/RF/SWR/CAL to CAL.  
Illustration  
Figure 13  
The SWR is keyed to the actual frequen-  
cy of the RF signal transmitted. There-  
fore, you will get a different SWR  
reading from one CB channel to anoth-  
er. Almost all the CB transmissions usu-  
ally fall within an acceptable range.  
However, for optimum radio perfor-  
mance, we recommend you “fine tune”  
the antenna’s system to the most com-  
monly used CB channel. If you have no  
particular channel preference, set your  
antenna’s SWR for maximum perfor-  
mance on Channel 19.  
10  
 
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STANDING WAVE RATIO CHART  
The ideal standing wave ratio (SWR) reading is a 1:1 ratio, or a meter reading of 1 on  
the SWR meter’s top scale (which you can usually get only in laboratory test condi-  
tions). A 1.5:1 to 2:1 SWR ratio is excellent for most mobile CB antenna applications.  
This chart explains the different readings you might see.  
Standing Wave Ratio Chart  
Ratios  
Rating  
Description  
1:1 to 1.5:1  
Superior  
Perfect match between the antenna/cable system and  
the CB’s RF output power.  
1.5:1 to 2:1  
2:1 to 3:1  
Excellent  
The antenna/cable system are an outstanding match  
with this CB transmitter’s RF output power. Ideal for  
most CB installations.  
Good  
The antenna/cable system with this CB transmitter will  
perform to specifications under most normal conditions.  
Higher  
than 3.1  
Inefficient  
Requires inspection of antenna system’s mounting  
hardware or ground, or adjustment/replacement.  
Note: Prolonged exposure to the elements (salt spray, humidity, corrosion, and so  
on) or vehicle vibration can cause degradation in antenna performance and a rise in  
the SWR meter’s normal reading. Once a month, or anytime the SWR reading is  
greater than 3, check the condition of the antenna and its coaxial cable, RF electrical  
connections, and so on.  
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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  
get more enjoyment from using your CB.  
3. To turn on the CB, turn OFF/VOL-  
UME clockwise until it clicks and  
continue turning until you hear a  
hissing sound. The TX/RX indicator  
lights, the CB displays the last-tuned  
channel number, and the SWR/RF/  
signal meter lights.  
Caution: Do not attempt to use your CB  
without first connecting an antenna.  
DIM/BRT to  
Note: If necessary, set  
DIM to dim the meter and channel  
display, or to BRT to brighten them.  
TURNING ON THE CB  
AND RECEIVING  
TRANSMISSIONS  
Illustration  
1. Turn SQUELCH fully counterclock-  
wise.  
4. Turn SQUELCH clockwise until the  
hissing sound stops.  
Illustration  
Note: If the CB picks up unwanted,  
partial or very weak transmissions,  
turn  
SQUELCH  
clockwise  
to  
decrease the CB’s sensitivity to  
these signals. Turn SQUELCH coun-  
terclockwise if you want to listen to a  
weak or distant station.  
2. Set CH-9/NOR/CH-19 to NOR, S/RF/  
SWR/CAL to S/RF (send and  
receive), and CB/WX/PA to CB.  
5. Adjust OFF/VOLUME to a comfort-  
able listening level.  
Illustration  
12  
 
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RF GAIN  
clockwise  
to boost the strength of a signal.  
6. To manually tune channels, turn the  
tuning control at the right end of the  
control panel to select a channel.  
The channel number appears on the  
display, and the SWR/RF/signal  
meter shows the signal strength.  
7. If necessary, turn  
Illustration  
Illustration  
8. If you hear low-level popping-type  
NB/OFF  
NB  
to turn on  
noises, set  
to  
the noise blanking circuit.  
Notes:  
Illustration  
• If you turn the tuning control  
slightly to the left or right, the  
TRC-445 rapidly scans down or  
up.  
OFF/  
9. To turn off the TRC-445, turn  
VOLUME  
hear it click.  
counterclockwise until you  
To quickly tune to Channel 9 or  
CH-9/NOR/CH-19  
CH-9  
19, set  
or  
to  
CH-19  
. 9 or 19 flashes on the  
display.  
TRANSMITTING  
CH-9/NOR/CH-19  
CH-9  
• If you set  
to  
CH-19  
or  
, you cannot tune other  
Note: We recommend you try receiving  
transmissions before you transmit.  
channels using the tuning control.  
Important! Channels 9 and 19  
are reserved for motorist assis-  
tance and for reporting emer-  
1. Follow Steps 1–8 under “Turning On  
the CB and Receiving Transmis-  
sions” on Page 12.  
gency  
information  
about  
accidents, hazardous road condi-  
tions, and so on. Always give  
emergency communications pri-  
ority on Channels 9 and 19.  
2. Hold down the microphone’s talk  
button and speak into the micro-  
phone in a normal voice from about  
TX/RX  
2–3 inches away. The  
indica-  
tor changes to red, and the SWR/  
RF/signal meter indicates the  
strength of your transmission.  
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Note: Do not speak too loudly when  
transmitting. It does not make your  
signal any stronger, and might dis-  
tort your transmission.  
Your TRC-445 receives these weather  
service frequencies:  
Frequency (MHz)  
Channel  
162.400  
162.425  
162.450  
162.475  
162.500  
162.525  
162.550  
WX 2  
WX 4  
WX 5  
WX 3  
WX 6  
WX 7  
WX 1  
Illustration  
3. When you finish transmitting,  
release the microphone talk button.  
TX/RX  
The  
indicator changes to  
green. The TRC-445 can now  
receive transmissions.  
To listen to one of the seven available  
CB/WX/PA WX  
weather channels, set  
to  
to choose the de-  
WX/ALERT  
,
OFF/  
4. To turn off the TRC-445, turn  
WEATHER  
then turn  
VOLUME  
counterclockwise until you  
sired channel. The  
lights green.  
indicator  
hear it click.  
LISTENING TO WEATHER  
BROADCASTS  
Illustration  
The TRC-445 is preprogrammed to re-  
ceive seven channels which have been  
allocated by the Federal Communica-  
tions Commission (FCC) for use by the  
National Oceanographic and Atmo-  
spheric Administration (NOAA). NOAA  
broadcasts your local forecast and re-  
gional weather information on one or  
more of these channels in your area.  
CB/WX/PA  
WX  
,
Note: When you set  
to  
the channel display and SWR meter turn  
off.  
OFF/VOLUME  
Readjust  
if necessary.  
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4. Hold down the microphone talk but-  
ton and speak into the microphone  
in a normal voice.  
Weather Alert  
In the event of severe weather condi-  
tions, the National Weather Service  
broadcasts a special signal tone (1050  
Hz) that the TRC-445 sounds if it is  
turned on. When the radio receives this  
signal tone, the WX/ALERT indicator  
glows red in the CB or PA mode and or-  
ange in the WX mode.  
Note: To prevent feedback, hold the  
microphone as far away from the PA  
speaker as possible.  
5. Adjust OFF/VOLUME as needed to  
adjust the PA’s volume.  
If CB/WX/PA is set to CB or PA, switch to  
WX to hear special severe weather infor-  
mation and warnings.  
Note: If the TRC-445 is turned off, it  
does not sound the signal tone.  
USING THE PUBLIC  
ADDRESS FUNCTION  
1. Connect a PA speaker to the TRC-  
445 (see “Connecting Optional  
External Speakers” on Page 9).  
2. Turn OFF/VOLUME fully counter-  
clockwise.  
3. Set CB/WX/PA to PA. The SWR/RF/  
signal meter and TX/RX indicator  
turn off.  
Illustration  
15  
 
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CB OPERATION TIPS  
Like most activities, CB radio has its  
customs and courtesies. The following  
tips will help you get the most enjoyment  
out of your CB.  
• Contact friends or neighbors — find  
out “what’s happening” or plan a  
get-together.  
• Ever have car trouble or run out of  
gas on the highway? What an  
assurance it is to be able to radio for  
assistance.  
COMMON USES FOR A CB  
RADIO  
• Camping, fishing, and other sports  
are more fun with a CB. Locate a  
buddy or find out “what’s cooking”  
back at camp.  
Business Uses  
• Truck drivers and delivery personnel  
can learn road and traffic conditions  
and get assistance in locating desti-  
nations. A CB is also good company  
on those “long hauls.”  
CB COURTESY  
• Wait for a pause in someone else’s  
transmission before you ask for a  
break.  
• On construction crews, a CB quickly  
pays for itself when you are calling  
for additional materials or coordinat-  
ing the activities of different work  
crews.  
• If you do not receive an answer to  
your call after a second attempt,  
sign off and wait several minutes  
before trying again.  
• For security officers, a CB is more  
than a convenience — it is a must  
for both safety and efficiency.  
• Do not hold down the microphone  
talk button when you are not talking.  
(This is called “dead keying.”)  
Personal Uses  
• Assist callers with directions, infor-  
mation about road conditions, and  
any other reasonable requests.  
• Keep in touch with home while driv-  
ing 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.  
• If you are a two-car (or more) family,  
CBs are great for communicating  
with family members while they are  
in their cars.  
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USING COMMON 10-CODES  
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 areas.  
This table lists codes adopted by the Associated Public-Safety Communications Of-  
ficers (APCO).  
Code  
Meaning  
Code  
Meaning  
10-1  
10-2  
10-3  
Your signal is bad.  
Your signal is good.  
Stop transmitting.  
10-17  
10-18  
10-19  
10-20  
10-21  
10-22  
10-23  
10-24  
10-25  
En route.  
Urgent.  
Contact _____.  
Message received and under-  
stood.  
What is your location?  
Call _____ by telephone.  
Cancel last message.  
Arrived at the scene.  
Assignment complete.  
Meet _____.  
10-4  
10-5  
Relay information to _____.  
I am busy or are you busy?  
Out of service.  
10-6  
10-7  
10-8  
In service.  
10-9  
10-10  
10-11  
10-12  
Repeat last message.  
Negative (NO).  
Estimated time of arrival is  
_____.  
10-26  
_____ in service.  
Stand by.  
10-30  
10-31  
Use caution.  
Pick up.  
Report road/weather condi-  
tions.  
Emergency traffic. Clear the  
channel.  
10-13  
10-33  
10-14  
10-15  
10-16  
Information.  
10-34  
10-41  
10-62  
What time is it?  
Message delivered.  
Reply to message.  
Switch to Channel –.  
Cannot understand.  
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Here are a few hints to help you reduce  
or eliminate such noise.  
MAXIMUM RANGE  
The maximum range and quality of CB  
transmissions vary depending on these  
conditions:  
• Replace old ignition wires with new,  
high-voltage,  
wires.  
noise-suppression  
• The type and quality of antenna  
used  
• Install noise suppressors on your  
spark plugs, or install new spark  
plugs that have built-in suppressors.  
• The height of the antenna’s mount-  
ing location  
antenna, the better the signal’s  
range  
the higher the  
• Be sure that the ground connection  
(black wire) is securely attached to  
either your vehicle battery’s nega-  
tive (–) terminal or to the DC power  
supply’s negative terminal.  
• The surrounding terrain — moun-  
tains and tall buildings limit the  
range  
If problems persist, check your alterna-  
tor/generator, regulator, and gauges.  
Noise from these sources can be re-  
duced or eliminated using bypass ca-  
pacitors at various output voltage points.  
• Weather conditions  
• The number of nearby CBs operat-  
ing on the same channel  
Your local RadioShack store has a wide  
selection of noise-suppression accesso-  
ries.  
REDUCING NOISE  
The noise blanking (NB) 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 use the CB with the engine on,  
you can determine the source of the  
noise by turning off the engine and oper-  
ating the CB with the ignition set to ACC.  
If most or all of the noise goes away, the  
problem is in your vehicle’s ignition or  
electrical system.  
18  
 
21-1573.fm Page 19 Thursday, August 5, 1999 9:22 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 RadioShack store for  
assistance.  
Symptom:  
Check That:  
• The CB is turned on.  
Trouble with reception  
CB/WX/PA is set to CB.  
OFF/VOLUME is turned up.  
RF GAIN 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 transmission  
• The CB is turned on.  
OFF/VOLUME is turned up.  
• The microphone is securely connected to the  
CB.  
• All connectors are clean and tightened.  
• You are fully pressing the microphone talk but-  
ton.  
• The antenna cable is securely connected to  
both the antenna and the CB.  
No channel selection, or only  
Channel 9 or 19 can be  
selected  
CB/WX/PA is set to CB.  
CH-9/NOR/CH-19 is set to NOR.  
CB does not work at all  
• The power supply and in-line fuse are working  
(see “Replacing the Fuses” on Page 21).  
19  
 
21-1573.fm Page 20 Thursday, August 5, 1999 9:22 AM  
CARE AND MAINTENANCE  
Your RadioShack TRC-445 Deluxe 40-Channel Mobile CB Radio with Weather Alert  
is an example of superior design and craftsmanship. The following suggestions will  
help you care for your TRC-445 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.  
Use and store the CB only in normal temperature environments. Tem-  
perature extremes can shorten the life of electronic devices and distort  
or melt plastic parts.  
Keep the CB away from dust and dirt, which can cause premature wear  
of parts.  
Handle the CB gently and carefully. Dropping it can damage circuit  
boards and cases and can cause the CB to work improperly.  
Wipe the CB with a damp cloth occasionally to keep it looking new. Do  
not use harsh chemicals, cleaning solvents, or strong detergents to  
clean the CB.  
Modifying or tampering with the CB’s internal components can cause a malfunction  
and might invalidate the 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 RadioShack store for as-  
sistance.  
20  
 
21-1573.fm Page 21 Thursday, August 5, 1999 9:22 AM  
3. If the fuse is blown, replace it.  
REPLACING THE FUSES  
Caution: Make sure you replace the  
fuse only with another fuse of the  
same type and rating.  
The TRC-445’s 2-amp fuses help pro-  
tect your CB from power surges and  
short circuits.  
4. To close the fuse holder, push the  
fuse holder ends together, then turn  
either end clockwise.  
• If the red wire’s fuse is blown,  
replace it with a 2-amp, fast-acting  
glass fuse, such as Cat. No. 270-  
1007.  
• If the orange wire’s fuse is blown,  
replace it with a 1-amp, fast-acting  
glass fuse, such as Cat. No. 270-  
1005.  
Follow these steps to replace each fuse.  
1. Make sure the power source and  
CB are both off.  
2. To open the fuse holder, push the  
fuse holder ends together, then turn  
either end counterclockwise and  
release it.  
Illustration  
21  
 
21-1573.fm Page 22 Thursday, August 5, 1999 9:22 AM  
SPECIFICATIONS  
GENERAL  
Channels ................................................................................................. 40 Channels  
Frequency Range ........................................................... 26.965 MHz to 27.405 MHz  
Power Requirements ........................ 13.8 V DC (12–16 Volts DC, Negative Ground)  
1
7
1
Dimensions ............................................................................. 7 /4 × 7 /8 × 2 /4 Inches  
(184 × 200 × 57 mm)  
Weight ................................................................................................. 3.1 lbs (1.4 kg)  
RECEIVER  
Sensitivity ............................................................. 0.7 µV or better for 10 dB (S+N)/N  
Adjacent Channel Rejection ........................................................... 65 dB (at 10 KHz)  
Audio Output ............................................................................. 4.5 Watts (Maximum)  
Frequency Response ............................................................................ 450–2500 Hz  
Intermediate Frequency ............................................................... 1st IF: 10.695 MHz  
2nd IF: 455 KHz  
Cross Modulation .............................................................................................. 50 dB  
Squelch ..................................................................... Adjustable from 0.5 µV to 1 mV  
TRANSMITTER  
Output Power ...................................................................... 4 Watts (FCC Maximum)  
Type of Modulation ............................. AM Double-Sideband, Full Carrier Modulation  
Modulation Capability ......................................................................................... ±90%  
Spurious Emission .......................................................................... Less than –70 dB  
Frequency Tolerance ................................................................................... ± 200 Hz  
Antenna Impedance ....................................................................................... 50 Ohm  
Current Drain (13.8-volt supply) ........................................ 1 Amp with No Modulation  
1.6 Amps with 80% Modulation  
22  
 
21-1573.fm Page 23 Thursday, August 5, 1999 9:22 AM  
PUBLIC ADDRESS  
Output Power ............................................................................ 4.2 Watts (Maximum)  
Current Drain (at maximum power) ............................................................. 1.2 Amps  
WEATHER RADIO  
Frequency Coverage ............................................................................. 162.400 MHz  
162.425MHz  
162.450MHz  
162.475MHz  
162.500MHz  
162.525MHz  
162.550 MHz  
Specifications are typical; individual units might vary. Specifications are subject to  
change and improvement without notice.  
23  
 
21-1573.fm Page 24 Thursday, August 5, 1999 9:22 AM  
Limited Ninety-Day Warranty  
This product is warranted by RadioShack against manufacturing defects in material and workman-  
ship under normal use for ninety (90) days from the date of purchase from RadioShack company-  
owned stores and authorized RadioShack franchisees and dealers. EXCEPT AS PROVIDED  
HEREIN, RadioShack MAKES NO EXPRESS WARRANTIES AND ANY IMPLIED WARRANTIES,  
INCLUDING THOSE OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE,  
ARE LIMITED IN DURATION TO THE DURATION OF THE WRITTEN LIMITED WARRANTIES  
CONTAINED HEREIN. EXCEPT AS PROVIDED HEREIN, RadioShack SHALL HAVE NO LIABIL-  
ITY OR RESPONSIBILITY TO CUSTOMER OR ANY OTHER PERSON OR ENTITY WITH RE-  
SPECT TO ANY LIABILITY, LOSS OR DAMAGE CAUSED DIRECTLY OR INDIRECTLY BY USE  
OR PERFORMANCE OF THE PRODUCT OR ARISING OUT OF ANY BREACH OF THIS WAR-  
RANTY, INCLUDING, BUT NOT LIMITED TO, ANY DAMAGES RESULTING FROM INCONVE-  
NIENCE, LOSS OF TIME, DATA, PROPERTY, REVENUE, OR PROFIT OR ANY INDIRECT,  
SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES, EVEN IF RadioShack HAS BEEN AD-  
VISED OF THE POSSIBILITY OF SUCH DAMAGES.  
Some states do not allow the limitations on how long an implied warranty lasts or the exclusion of in-  
cidental or consequential damages, so the above limitations or exclusions may not apply to you.  
In the event of a product defect during the warranty period, take the product and the RadioShack  
sales receipt as proof of purchase date to any RadioShack store. RadioShack will, at its option, un-  
less otherwise provided by law: (a) correct the defect by product repair without charge for parts and  
labor; (b) replace the product with one of the same or similar design; or (c) refund the purchase  
price. All replaced parts and products, and products on which a refund is made, become the prop-  
erty of RadioShack. New or reconditioned parts and products may be used in the performance of  
warranty service. Repaired or replaced parts and products are warranted for the remainder of the  
original warranty period. You will be charged for repair or replacement of the product made after the  
expiration of the warranty period.  
This warranty does not cover: (a) damage or failure caused by or attributable to acts of God, abuse,  
accident, misuse, improper or abnormal usage, failure to follow instructions, improper installation or  
maintenance, alteration, lightning or other incidence of excess voltage or current; (b) any repairs  
other than those provided by a RadioShack Authorized Service Facility; (c) consumables such as  
fuses or batteries; (d) cosmetic damage; (e) transportation, shipping or insurance costs; or (f) costs  
of product removal, installation, set-up service adjustment or reinstallation.  
This warranty gives you specific legal rights, and you may also have other rights which vary from  
state to state.  
RadioShack Customer Relations, Dept. W, 100 Throckmorton St., Suite 600, Fort Worth, TX 76102  
We Service What We Sell  
3/97  
RadioShack  
A Division of Tandy Corporation  
Fort Worth, Texas 76102  
11A7  
Printed in Thailand  
 

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