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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 TRC521 CB

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 Mo...

Page 2: ...ch 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 mou...

Page 3: ...g 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...

Page 4: ...it 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 p...

Page 5: ...ative 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 po...

Page 6: ...se signal strength 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...

Page 7: ...mpleted 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 loca...

Page 8: ...nvenience 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...

Page 9: ...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...

Page 10: ...ALERT 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...

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 TH...

Page 12: ...t 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 t...

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...

Page 14: ...ve 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 Transmi...

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 g...

Page 16: ...roduct 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...

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