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©

 2004 RadioShack Corporation.

All Rights Reserved.

RadioShack and RadioShack.com 

are trademarks used by 

RadioShack Corporation.

OWNER’S MANUAL — 
Please read before using this equipment.

www.radioshack.com

SM

Thank you for purchasing the RadioShack TRC521 CB Radio. It provides two-way 
communication on the citizen’s radio band and lets you tune to local and national weather 
service broadcasts. It provides the maximum legal power output for the greatest available 
range, and a built-in PLL (phase-locked loop) frequency synthesizer to reduce congestion.

CB radio provides hours of fun and entertainment! Listen and talk to people from all over the 
country while traveling, and make new friends along routes that you regularly travel. It is also a 
great way to keep informed of local emergencies, such as traffic accidents, road blocks, 
weather alerts and so on.

UP/DN — Press or hold 
down to scroll up or down 
through channels.

Microphone 

Mounting Bracket

Microphone Holder

PTT — Push to talk. Hold down 
and talk into the microphone 
while transmitting.

Mounting hardware supplied 
for the microphone holder 
and CB.

CB/WX — Slide to CB to 
use and listen to citizen’s 
band radio. Slide to WX to 
listen to local and national 
weather broadcasts.

Connect the supplied 
microphone here.

RF GAIN — Rotate to 
improve signal reception in 
strong signal areas. See 
Page 6.

OFF/VOLUME — Rotate towards 
VOLUME to turn on your CB, and then 
adjust to desired listening level. Rotate 
towards OFF to turn off your CB.

SQUELCH — Rotate to reduce 
background noise (CB sensitivity). 
See Page 6.

DUAL WATCH/ALERT TONE OFF — 
Press to activate dual watch (see 
Page 11), or to silence weather alert 
tones (see Page 10).

CHANNEL — Rotate to 
tune to a channel.

TRC521 CB Radio

!

 IMPORTANT 

!

If an icon appears at the end of a paragraph, go to the box on that page 
with the corresponding icon for pertinent information.

— Warning 

 — Caution

Ô

 — Note 

21-1711

Summary of Contents for 21-1711

Page 1: ...rts and so on UP DN Press or hold down to scroll up or down through channels Microphone Mounting Bracket Microphone Holder PTT Push to talk Hold down and talk into the microphone while transmitting Mounting hardware supplied for the microphone holder and CB CB WX Slide to CB to use and listen to citizen s band radio Slide to WX to listen to local and national weather broadcasts Connect the supplie...

Page 2: ...ach the CB wires and cables are clear of the vehicle s pedals or other moving parts the CB is not directly in front of heating vents all wires and cables can reach their connection points 1 Use the mounting bracket as a template to mark the positions for the screws on the mounting surface Vertical Horizontal Microphone Holder oWARNING o Mount the CB securely to avoid damage to the CB or vehicle an...

Page 3: ...ug s locking nut clockwise to secure it 3 Slide the microphone onto the holder 4 To disconnect the microphone unscrew the locking nut and pull the microphone plug toward you Do not pull the microphone cable CONNECTING AN ANTENNA To use this CB you need a mobile or base station antenna There are many types of antennas for CBs Each type has its own benefits so choose the one that best meets your nee...

Page 4: ...t to the ANT jack CONNECTING TO VEHICLE BATTERY POWER 1 Connect the CB s red POWER wire to a terminal in your vehicle s fuse box that has power only when the ignition is in the ACC accessory or ON position 2 Connect the CB s black POWER wire to a metal part of the vehicle s frame chassis ground Ô CONNECTING AN OPTIONAL EXTERNAL SPEAKER You can connect an external speaker to the CB Use an 8 ohm spe...

Page 5: ...gative terminal on the DC power supply 4 Connect the CB s red POWER wire to the positive terminal on the DC power supply 5 Connect the DC power supply to a standard AC outlet 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 ANT Jack Cable o...

Page 6: ...e signal strength Ô 8 To tune to a channel rotate CHANNEL on the radio or press UP or DN on the microphone To quickly scroll through channels in either direction hold down UP or DN until you reach the desired channel 9 Adjust VOLUME to a comfortable listening level 10 To turn off the CB rotate OFF VOLUME counterclockwise to OFF until it clicks TRANSMITTING 1 To transmit hold down PTT on the microp...

Page 7: ...ompleted standing by 10 11 Talking too rapidly 10 12 Visitors present 10 13 Advise Weather Road conditions 10 17 Urgent business 10 18 Anything for us 10 19 Nothing for you Return to base 10 20 My location is____ 10 21 Call by telephone 10 22 Report in person to____ 10 23 Please stand by 10 25 Can you contact____ 10 26 Disregard last information 10 27 I am moving to channel____ 10 28 Identify your...

Page 8: ...onvenience it is a must for both safety and efficiency PERSONAL USE 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...

Page 9: ...B is exceptionally quiet any noise you hear is probably from an external source in your vehicle such as the alternator another radio or spark plugs You can determine the noise source by turning off the engine and operating the CB with your vehicle s ignition set to ACC If the noise is reduced the problem is in your vehicle s ignition or electrical system To reduce or eliminate such noise Make all ...

Page 10: ...LERT lights Channel Frequency MHz WX1 162 400 WX2 162 425 WX3 162 450 WX4 162 475 WX5 162 500 WX6 162 525 WX7 162 550 Alert Type You Hear Warning Continuous short beeps Watch Three short beeps and a 2 second pause repeats Advisory Two short beeps and a 2 second pause repeats Test One short beep and a 3 second pause repeats EAT Emergency Action Termination One short beep and a 3 second pause repeat...

Page 11: ...t When finished the radio returns to the previous station This feature only works in CB mode To activate dual watch press DUAL WATCH DUAL WATCH lights Press DUAL WATCH again to deactivate REPLACING THE FUSE The CB s in line fuse protects it from power surges and short circuits When replacement is required use a 2 amp fast acting glass fuse available at your local RadioShack store 1 Make sure the v...

Page 12: ...it to your local RadioShack store for assistance To locate your nearest RadioShack use the store locator feature on RadioShack s website www radioshack com or call 1 800 The Shack 843 7422 and follow the menu options Modifying or tampering with the CB s internal components can cause a malfunction and might invalidate its warranty and void your FCC authorization to operate it Symptom Suggestion Tro...

Page 13: ... CB might cause TV or radio interference 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 it Try to eliminate the interference by moving your CB away from the receiver connecting your CB to an outlet that is on a different electrical circuit from the receiver contacting your local RadioShac...

Page 14: ...eive Battery Drain 280 mA to 1500 mA from No Signal to Maximum Output TRANSMITTER Frequency Tolerance 0 0005 Maximum Output Power 4 Watts maximum allowed by FCC Spurious Emission 65 dB or better Transmit Battery Drain 1270 mA to 1870 mA from No Modulation to 80 Modulation Limit Modulation Frequency Response 1 kHz 0 dB Reference Lower at 450 Hz 3 dB Upper at 2 5 kHz 3 dB Modulation Type and Capacit...

Page 15: ... ACCESSORIES Depending on how and where you plan to use your CB radio the following accessories can be used with your CB radio for enhanced fuctionality and power Visit your local RadioShack store or go to www radioshack com to browse for a variety of CB accessories CB Antenna SWR Meter 8 ohm External Speaker 12V DC Power Supply Base Station Antenna Coaxial Antenna Cable and Connectors Antenna Con...

Page 16: ...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 produ...

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