Radio Shack Two Way Radio TRC 234 User Guide

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Cat. No. 21-1678  
OWNER’S MANUAL  
Please read before using this equipment.  
TRC-234  
5-Watt, 40-Channel  
CB Walkie-Talkie  
with 10 Weather Channels  
 
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High/Low Power Button — lets you save power by  
selecting a suitable transmitting power for long or  
short distances.  
For your records, we recommend you record your  
CB’s serial number here. The number is located on  
the CB’s back panel.  
Serial Number _____________________  
FCC INFORMATION  
The Federal Communications Commission (FCC)  
does not require you to have a license to operate this  
CB. However, you must know Part 95 of FCC Rules.  
It explains the proper operation of a Class D citizen’s  
band transceiver. We enclosed a copy of Part 95 with  
your CB.  
Warning: Do not open the CB to make any internal  
adjustments. A CB is set up to transmit a regulated  
signal on an assigned frequency. It is against the law  
to alter or adjust the settings inside the unit to exceed  
these limitations.  
Any adjustments to a CB must be made by a quali-  
fied technician using the proper test equipment.  
To be safe and sure:  
• Never open your CB’s case.  
• Never change or replace anything in your CB.  
Your CB might cause TV or radio interference even  
when it is operating properly. To determine whether  
your CB is causing the interference, turn it off. If the  
interference goes away, your CB is causing it. Try to  
eliminate the interference by:  
• Moving your CB away from the receiver  
• Contacting a radio/TV technician or your local  
Radio Shack store for help  
If you cannot eliminate the interference, the FCC re-  
quires that you stop using your CB.  
This device complies with Part 95 of FCC Rules. Op-  
eration is subject to the following two conditions:  
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1. This device must not cause harmful interfer-  
ence.  
2. This device must accept any interference re-  
ceived, including interference that may cause  
undesired operation.  
CONTENTS  
Preparation ........................................................... 6  
Connecting Power ........................................... 6  
Using Internal Batteries ............................ 6  
Using Vehicle Battery Power .................... 8  
Using Standard AC Power ....................... 9  
Charging Nickel-Cadmium Batteries ............. 11  
Connecting an Antenna ................................ 12  
Using an External Speaker ........................... 13  
Using an External Speaker/Microphone ........ 13  
Using the Wrist Strap .................................... 14  
Using the Belt Clip ......................................... 14  
Operation ............................................................ 15  
Receiving Transmissions  
and Adjusting Squelch .................................. 15  
Transmitting .................................................. 16  
Turning On/Off the Light ................................ 17  
Locking the Functions ................................... 18  
Using Channel 9 ............................................ 18  
Listening to the Weather Band ...................... 19  
Operational Hints ............................................... 20  
Common Uses for a CB ................................ 20  
Business Uses ....................................... 20  
Personal Uses ....................................... 20  
Transmission Courtesy ................................. 21  
Maximum Range ........................................... 21  
Using Common 10-Codes ............................. 21  
Channel Assignments ................................... 23  
Care and Maintenance ....................................... 25  
Specifications ..................................................... 26  
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PREPARATION  
CONNECTING POWER  
You can power your transceiver from any of three  
sources:  
• Internal batteries (not supplied)  
• Vehicle battery power (using an optional DC cig-  
arette lighter power cord)  
• Standard AC power (using an optional DC  
power supply)  
Note:  
Connecting a DC power cord automatically  
disconnects internal batteries.  
Using Internal Batteries  
You can power your transceiver with nine AA batter-  
ies. For the longest operation and best performance,  
we recommend alkaline batteries (such as Cat. No.  
23-552). Or, you can use rechargeable nickel-  
cadmium batteries (Cat. No. 23-125).  
Follow these steps to install or replace batteries.  
VOLUME/OFF  
1. If the transceiver is on, turn  
coun-  
terclockwise until it clicks to turn it off.  
2. Remove the battery compartment cover by slid-  
ing it in the direction of the arrow.  
illustration  
3. Remove any old batteries from the compart-  
ment.  
Cautions  
:
Always dispose of old batteries promptly and  
properly.  
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Never leave dead, old, or weak non-  
rechargeable batteries in the transceiver.  
They can leak chemicals and corrode or dam-  
age electronic circuits.  
Do not expose batteries to extreme heat or  
fire. They might explode and cause personal  
injury or damage equipment.  
4. Position the NI/AL switch to match the battery  
type.  
NI: for rechargeable nickel-cadmium batter-  
ies (see “Charging Nickel-Cadmium Batter-  
ies”).  
AL: for standard or alkaline batteries.  
illustration  
5. Install nine fresh non-rechargeable batteries or  
nine nickel-cadmium batteries as indicated by  
the polarity symbols (+ and –) marked inside the  
battery compartment.  
illustration  
Cautions:  
Improper installation (incorrect polarity) might  
damage the transceiver.  
Use only fresh batteries of the required size  
and type. Never mix new and old batteries or  
rechargeable and non-chargeable batteries in  
the transceiver.  
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If you do not plan to use batteries in the trans-  
ceiver for a month or more, remove the bat-  
teries. This protects the transceiver from  
possible battery leakage.  
6. Replace the cover.  
When BATT (battery low) appears on the display, re-  
place or recharge the batteries.  
Using Vehicle Battery Power  
You can power your transceiver from your vehicle’s  
cigarette lighter socket with an optional DC cigarette  
lighter power cord (such as Cat. No. 270-1534).  
Cautions:  
• You must use a DC power cord that supplies 12  
volts and delivers at least 2.5 amps. Its center tip  
must be set to positive, and it must have a plug  
that properly fits your transceiver’s DC13.8V  
CHARGE jack. The recommended power cord  
meets these requirements. Using a power cord  
that does not meet these specifications could  
damage the transceiver or the power cord.  
To protect your vehicle’s electrical system,  
always plug the power cord into the transceiver  
before you plug it into your vehicle’s cigarette  
lighter socket. Always unplug the power cord  
from the vehicle’s cigarette lighter socket before  
you unplug it from the transceiver.  
illustration  
1. Insert the power cord’s barrel plug into the trans-  
ceiver’s DC13.8V CHARGE jack.  
2. Plug the other end of the cord into your vehicle’s  
cigarette lighter socket.  
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Notes:  
If you installed rechargeable nickel-cadmium  
batteries in the transceiver, connect the DC  
power cord to the DC13.8V CHARGE jack and  
be sure the NI/AL switch is set to NI. This pow-  
ers the transceiver and recharges the batter-  
ies at the same time. See “Charging Nickel-  
Cadmium Batteries.”  
If the transceiver does not operate when you  
use the power cord, unplug the cord from the  
cigarette lighter socket and clean the socket  
to remove ashes and debris. If it still does not  
operate properly, check the in-line fuse in the  
power cord.  
Using Standard AC Power  
You can operate the transceiver from AC power us-  
ing a 12-volt DC power supply (such as Cat. No. 22-  
120, not supplied), a DC cigarette lighter power cord  
(such as Cat. No. 270-1534, not supplied), and a cig-  
arette lighter accessory outlet (such as Cat. No. 270-  
1539, not supplied).  
Cautions:  
You must use a DC power cord that supplies 12  
volts and delivers at least 2.5 amps. Its center tip  
must be set to positive, and it must have a plug  
that properly fits your transceiver’s DC13.8V  
CHARGE jack. The recommended power cord  
meets these requirements. Using a power cord  
that does not meet these specifications could  
damage the transceiver or the power cord.  
• Be sure you connect the DC power cord to the  
transceiver before you connect it to the power  
supply. Then disconnect the power cord from the  
power supply before you disconnect it from the  
transceiver.  
Note: Most 12-volt DC power supplies plug into a  
standard AC outlet to produce DC power. Before  
connecting your transceiver to a 12-volt DC power  
supply, read and follow the instructions included with  
the power supply.  
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Follow these steps to power the transceiver from AC  
power.  
1. Using the double-sided foam tape supplied with  
the cigarette lighter accessory outlet, mount the  
accessory outlet to the DC power supply.  
2. Insert the power cord’s barrel plug into the trans-  
ceiver’s DC13.8V CHARGE jack.  
Note: If you installed rechargeable nickel-cad-  
mium batteries in the transceiver, connect the  
power cord to the DC13.8V CHARGE jack and be  
sure the NI/AL switch is set to NI. This powers  
the transceiver and recharges the batteries at  
the same time. See “Charging Nickel-Cadmium  
Batteries.”  
3. Insert the cigarette lighter plug on the DC power  
cord into the cigarette lighter accessory outlet.  
4. Connect the DC power supply to a standard AC  
outlet.  
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CHARGING NICKEL-CADMIUM  
BATTERIES  
The transceiver has a built-in circuit that lets you re-  
charge nickel-cadmium batteries while they are in the  
transceiver. To charge the batteries, connect a DC  
power cord to the transceiver’s DC13.8V CHARGE  
jack and be sure the NI/AL switch is set to NI (see  
“Using Standard AC Power” or “Using Vehicle Bat-  
tery Power”).  
Warning:  
Do not connect a power cord to the trans-  
ceiver’s DC13.8V CHARGE jack if you installed non-re-  
chargeable batteries (standard, extra-life, or alkaline)  
and the NI/AL switch is set to NI. Non-rechargeable  
batteries become hot and can even explode if you try  
to recharge them.  
It takes about 16 to 18 hours to recharge batteries  
that are fully discharged.  
Nickel-cadmium batteries come fully discharged. The  
first time you use nickel-cadmium batteries, charge  
them about 18 hours to bring them to a full charge.  
Notes:  
• Nickel-cadmium batteries last longer and deliver  
more power if you occasionally let them fully dis-  
charge. To do this, simply use the transceiver  
until it no longer transmits or receives.  
To prevent permanent nickel-cadmium battery  
power loss, do not charge the batteries at tem-  
peratures below 14°F (–10°C) or above 131°F  
(55°C).  
• Do not overcharge batteries. Overcharging can  
severely reduce the battery’s useful life.  
Important:  
At the end of a rechargeable battery’s  
useful life, it must be recycled or disposed of proper-  
ly. Contact your local, county, or state hazardous  
waste management authorities for information on re-  
cycling or disposal programs in your area. Some op-  
tions that might be available are: municipal curb-side  
collection, drop off boxes at retailers, recycling col-  
lection centers, and mail-back programs.  
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CONNECTING AN ANTENNA  
Your transceiver comes with a flexible rubber anten-  
na that is ideal for most applications. However, the  
transceiver’s BNC antenna connector makes it easy  
to connect other types of antennas. Your local Radio  
Shack store sells a wide variety of antennas. Choose  
the one that best meets your needs.  
Follow these steps to connect the supplied antenna.  
illustration  
1. Position the antenna’s BNC connector over the  
antenna jack on the transceiver.  
2. Slip the slot in the antenna connector over the  
antenna jack’s tab on top of the transceiver.  
3. Press down and turn the antenna’s connector  
clockwise until it locks into place.  
To use a mobile or base-station antenna, attach an  
appropriate connector adapter (such as Cat. No.  
278-120, not supplied) to the end of the antenna’s  
cable. Then insert it onto the transceiver’s antenna  
connector.  
Warning:  
Use extreme caution when installing or re-  
moving an outdoor antenna. If the antenna starts to  
fall, let it go! It could contact overhead power lines. If  
the antenna touches a power line, contact with the  
antenna, mast, cable, or guy wires can cause elec-  
trocution and death! Call the power company to re-  
move the antenna. Do not attempt to remove the  
antenna yourself.  
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USING AN EXTERNAL SPEAKER  
In a noisy area, an external speaker (such as Cat. No.  
21-549) positioned in the right place might provide  
more comfortable listening. Plug the speaker cable’s  
1/8-inch (3.5 mm) mini-plug into the transceiver’s SPK  
jack. This disconnects the internal speaker.  
illustration  
USING AN EXTERNAL SPEAKER/  
MICROPHONE  
You can use an external speaker/microphone (such  
as Cat. No. 19-310). Plug the speaker/microphone’s  
connector into the transceiver’s MIC and SPK jacks.  
illustration  
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USING THE WRIST STRAP  
You can use the supplied wrist strap to keep the  
transceiver accessible. Hook the strap’s connecting  
ring to the tab, as shown. Then simply slip the strap  
over your hand.  
illustration  
USING THE BELT CLIP  
Use the supplied belt clip to make the transceiver  
easier to take with you. Use the two supplied screws  
to attach the belt clip to the transceiver. Slide the belt  
clip over your belt or waistband.  
illustration  
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OPERATION  
Before you use your transceiver, you should know  
how to use it effectively and courteously. “Operation-  
al Hints” contains information that will help you get  
more enjoyment from your transceiver.  
RECEIVING TRANSMISSIONS  
AND ADJUSTING SQUELCH  
SQUELCH  
1. Turn  
fully counterclockwise.  
illustration  
VOLUME  
2. Rotate  
clockwise until it clicks to turn  
on the power. A channel number appears on the  
display.  
illustration  
CHANNEL s  
3. Press  
nel.  
or t to select the desired chan-  
illustration  
Note:  
CHANNEL s  
when you are  
If you press  
tuned to Channel 40, the channel selector  
CHANNEL  
returns to Channel 1. If you press  
t
when you are tuned to Channel 1, the channel  
selector returns to Channel 40.  
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4. Adjust VOLUME to a comfortable listening level.  
5. To cut out background noise between transmis-  
sions, wait until there is no signal on the chan-  
nel, then slowly turn SQUELCH clockwise until  
the background noise stops.  
Note: Do not turn SQUELCH too far clockwise  
because you might cut out weak signals, too.  
6. To turn off the transceiver, turn VOLUME counter-  
clockwise until you hear it click.  
TRANSMITTING  
We recommend you try receiving transmissions be-  
fore you try to transmit.  
Follow these steps to transmit.  
TX  
1. Press and hold the talk button.  
appears on  
the display, and the signal meter on the display  
shows the output level. Hold the transceiver  
about 2-3 inches from your mouth and speak  
slowly and clearly in a normal tone of voice.  
illustration  
2. When you finish transmitting, release the talk  
button.  
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3. If you are transmitting to nearby units, press H/L  
to set the output power to low output power, if  
necessary. LOWappears on the display.  
illustration  
If the other transceiver is farther away or the  
receiving person complains of noise, press H/L  
again to set it to high output power. LOWdisap-  
pears from the display.  
4. To turn off the transceiver, turn VOLUME counter-  
clockwise until you hear it click.  
TURNING ON/OFF THE LIGHT  
Press LIGHT to turn on and off the display’s light. If  
you do not turn the light off manually, the light auto-  
matically shuts off in 5 seconds.  
illustration  
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LOCKING THE FUNCTIONS  
Use the KEY LOCK switch to lock the transceiver’s  
functions (except the talk button and LIGHT) to pre-  
vent accidental program changes. Press KEY LOCK  
so LOCKappears on the display.  
illustration  
To release the lock, press KEY LOCK again. LOCK  
disappears from the display.  
USING CHANNEL 9  
For emergency call monitoring or transmitting on  
Channel 9, just press CH-9. 9 and EMGappear on the  
display.  
illustration  
Important!  
Channel 9 is reserved for motorist assis-  
tance and for reporting emergency information about  
accidents, hazardous road conditions, and so on. Al-  
ways give emergency messages priority on Channel  
9.  
To release the transceiver from Channel 9, press CH-  
9 again. The previously selected channel number ap-  
pears on the display.  
Note:  
KEY LOCK WEATHER  
The  
,
, and  
CHANNEL  
but-  
17  
tons do not work when CH-9 is pressed.  
 
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LISTENING TO THE WEATHER  
BAND  
The FCC (Federal Communications Commission)  
has allocated 11 channels for use by the National  
Oceanographic and Atmospheric Administration  
(NOAA). NOAA broadcasts your local forecast and  
regional weather information on one or more of these  
channels in your area. We have preprogrammed  
your CB with 10 of the U.S frequencies used by  
NOAA. See “Channel Assignments.”  
To select a weather broadcast, press WEATHER then  
s
press CHANNEL or t to choose between the 10 fre-  
quencies. WXappears on the display.  
illustration  
Press WEATHER again to return to normal CB opera-  
tion.  
Note:  
H/L  
The  
and buttons do not work when  
CH-9  
WEATHER is pressed.  
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OPERATIONAL HINTS  
Like most activities, CB radio has its customs and  
courtesies. The following tips will help you get the  
most enjoyment from your transceiver.  
COMMON USES FOR A CB  
Business Uses  
• Truck drivers and delivery personnel can learn  
road and traffic conditions and get assistance in  
locating destinations. A CB is also good com-  
pany 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 more than a conve-  
nience — it is a must for both safety and effi-  
ciency.  
Personal Uses  
• 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.  
• If you are a two-car (or more) family, CBs are  
great for communicating with family members  
while they are in their cars.  
• 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  
call for assistance!  
• Camping, fishing, and other sports are more fun  
with a CB. Locate a buddy or find out “what’s  
cooking” back at camp.  
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TRANSMISSION COURTESY  
• Wait for a pause in someone else’s transmission  
before you ask for a break.  
• If you do not receive an answer to your call after  
a second attempt, sign off and wait several min-  
utes before trying again.  
• Do not hold down the talk button when you are  
not talking. (This is called dead keying.)  
• Assist callers with directions, information about  
road conditions, and any other reasonable  
requests.  
MAXIMUM RANGE  
The maximum range and quality of CB transceiver  
transmissions vary depending on the following condi-  
tions:  
• The type and quality of antenna used  
• The height of the antenna’s mounting location —  
the higher the antenna, the better the signal’s  
range  
• The surrounding terrain — mountains and tall  
buildings limit the range  
• Weather conditions  
• The number of nearby CBs operating on the  
same channel  
Note:  
Your transceiver’s transmission range is gen-  
erally line-of-sight. To ensure maximum range, al-  
ways keep fresh or fully-charged batteries in your  
CB.  
USING COMMON 10-CODES  
Citizen’s band operators and CB users have largely  
adopted the 10-codes for standard questions and an-  
swers. These codes permit faster communication  
and better intelligibility in noisy areas.  
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This table lists codes adopted by the Associated  
Public Safety Communications Officers (APCO).  
Code  
10-1  
Meaning  
Your signal is bad.  
10-2  
Your signal is good.  
Stop transmitting.  
10-3  
10-4  
Message received and understood.  
Relay information to _____.  
I am busy or are you busy?  
Out of service.  
10-5  
10-6  
10-7  
10-8  
In service.  
10-9  
Repeat last message.  
Negative (NO).  
10-10  
10-11  
10-12  
10-13  
10-14  
10-15  
10-16  
10-17  
10-18  
10-19  
10-20  
10-21  
10-22  
10-23  
10-24  
10-25  
10-26  
_____ in service.  
Stand by.  
Report road/weather conditions.  
Information.  
Message delivered.  
Reply to message.  
En route.  
Urgent.  
Contact _____.  
What is your location?  
Call _____ by telephone.  
Cancel last message.  
Arrived at the scene.  
Assignment complete.  
Meet _____.  
Estimated time of arrival is _____.  
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CHANNEL ASSIGNMENTS  
Your transceiver receives and transmits on the 40  
channels listed here.  
Frequency  
(MHz)  
Frequency  
(MHz)  
Channel  
Channel  
1
2
26.965  
26.975  
26.985  
27.005  
27.015  
27.025  
27.035  
27.055  
27.065  
27.075  
27.085  
27.105  
27.115  
27.125  
27.135  
27.155  
27.165  
27.175  
27.185  
27.205  
21  
22  
23  
24  
25  
26  
27  
28  
29  
30  
31  
32  
33  
34  
35  
36  
37  
38  
39  
40  
27.215  
27.225  
27.255  
27.235  
27.245  
27.265  
27.275  
27.285  
27.295  
27.305  
27.315  
27.325  
27.335  
27.345  
27.355  
27.365  
27.375  
27.385  
27.395  
27.405  
3
4
5
6
7
8
9
10  
11  
12  
13  
14  
15  
16  
17  
18  
19  
20  
22  
 
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In addition, your transceiver is programmed with the  
following weather service channels:  
Frequency  
Channel  
(MHz)  
01  
02  
03  
04  
05  
06  
07  
08  
09  
00  
162.550  
162.400  
162.475  
162.425  
162.450  
162.500  
162.525  
161.650  
161.775  
163.275  
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CARE AND MAINTENANCE  
Your Radio Shack TRC-234 5-Watt 40-Channel CB  
Walkie-Talkie 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 imme-  
diately. Liquids can contain minerals that can  
corrode the electronic circuits.  
• Use and store the CB only in normal tempera-  
ture environments. Temperature extremes can  
shorten the life of electronic devices, damage  
batteries, and distort or melt plastic parts.  
• Handle the CB gently and carefully. Dropping it  
can damage circuit 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 new. Do not use harsh chemi-  
cals, cleaning solvents, or strong detergents to  
clean the CB.  
Modifying or tampering with the CB’s internal compo-  
nents 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 Radio Shack store for assistance.  
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SPECIFICATIONS  
RECEIVER  
Frequency Coverage ............ 26.965 to 27.405 MHz  
Sensitivity....................................... 0.5 mV for 10 dB  
(S+N)/N Adjacent Channel Rejection ............. 60 dB  
Squelch .................................. Adjustable from 1 mV  
Audio Output ............................ 400 mW (10% THD)  
Current Drain  
Standby .................................................. 55 mA  
Receive ................................................ 550 mA  
Note:  
The transceiver draws an additional 800  
mA when charging nickel-cadmium batteries.  
TRANSMITTER  
Frequency Coverage ............ 26.965 to 27.405 MHz  
Power Input ....................................... 5 W (at HIGH)  
2.5 W (at LOW)  
Power Output ................................... 3.8W (at HIGH)  
0.8 W (at LOW)  
Conducted Spurious  
Emission Harmonics ......................... 60 dB or better  
Type of Modulation .............................................. A3  
Frequency Tolerance ................................... 0.002%  
Antenna Impedance .................................... 50 Ohm  
Current Drain  
HIGH ........................................................ 1.6 A  
LOW ..................................................... 600 mA  
Note:  
The transceiver draws an additional 800  
mA when charging nickel-cadmium batteries.  
Dimensions (HWD) ........... 21/8 ¥ 613/16 ¥ 13/4 Inches  
(54 ¥ 172.5 ¥ 45 mm)  
Weight ................................................. 11 oz (318 g)  
Specifications are typical; individual units might vary.  
Specifications are subject to change and improve-  
ment without notice.  
25  
 
21-1678.fm Page 26 Thursday, August 5, 1999 12:45 PM  
NOTES  
26  
 
21-1678.fm Page 27 Thursday, August 5, 1999 12:45 PM  
27  
 
21-1678.fm Page 28 Thursday, August 5, 1999 12:45 PM  
RADIO SHACK LIMITED WARRANTY  
This product is warranted against defects for 90 days  
from date of purchase from Radio Shack company-  
owned stores and authorized Radio Shack franchisees  
and dealers. Within this period, we will repair it without  
charge for parts and labor. Simply bring your Radio  
Shack sales 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 LIMITED IN DURATION  
TO THE DURATION OF THE WRITTEN LIMITED WAR-  
RANTIES CONTAINED HEREIN. Some states do not  
permit limitation or exclusion of implied warranties; there-  
fore, the aforesaid limitation(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  
4A5  
Printed in Thailand  
 

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