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12

OPERATION

Before you start using your CB, you
should know how to use it effectively
and courteously. “CB Operation Tips” on
Page 15 contains information that will
help you get more enjoyment from using
your CB.

TURNING ON THE CB AND 
RECEIVING 
TRANSMISSIONS

1. Turn 

SQUELCH

 fully counterclock-

wise.

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

.

3. To turn on the CB, turn 

OFF/VOLUME

clockwise until it clicks and you hear
a hissing sound. TX/RX lights, the
CB displays the last-tuned channel
number, and the SWR/RF/Signal
Meter lights.

4. Turn 

SQUELCH

 clockwise until the

hissing sound stops. 

Note: If the CB picks up unwanted,
partial or very weak transmissions,
continue to 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.

5. Adjust 

OFF/VOLUME

 to a comfort-

able listening level.

6. To manually tune channels, turn the

tuning control beneath the display to
select a channel. The selected
channel number appears, and the
SWR/RF/Signal Meter shows the
signal strength.

To quickly tune to Channel 9 or 19,
set 

CH-9/NOR/CH-19

 to 

CH-9

 or 

CH-

19

9

 or 

19

 flashes.

Important:  Always give emergency
communications priority on Chan-
nels 9 and 19. Your CB provides for
fast selection of Channel 9 and 19
for that reason.

Notes: 

• Selecting either Channel 9 or 19

overrides the manual channel
selection control.

• All channels, with the exception of

Channels 9 and 19, by agree-
ment, are available for general
communications. Channels 9 and
19 are reserved for motorist
assistance and for reporting
emergency situations, hazardous
road conditions, and the like. 

7. If necessary, turn 

RF GAIN

 clockwise

to boost the strength of a signal.

8. If you hear low-level popping-type

noise, set 

NB/OFF

 to 

NB

  to turn on

the noise blanking circuit.

9. To improve communication quality,

set 

ACE/OFF

 to 

ACE.

 This enables

the ACE circuit.

10. To turn off the TRC-446, turn 

OFF/

VOLUME

 counterclockwise until  you

hear it click.

21-1574.fm  Page 12  Thursday, May 13, 1999  4:03 PM

Summary of Contents for TRC-446

Page 1: ...Cat No 21 1574 OWNER S MANUAL Please read before using this equipment TRC 446 Deluxe 4 Watt 40 Channel Mobile CB Radio with Weather Alert and ACE 21 1574 fm Page 1 Thursday May 13 1999 4 03 PM...

Page 2: ...weather alert Built In SWR Meter helps you tune your antenna system to optimize your CB s performance RF Gain Control lets you adjust re ception to match the strength of the re ceived signal Convenien...

Page 3: ...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 p...

Page 4: ...the Standing Wave Ratio 9 Standing Wave Ratio Guidelines 10 Standing Wave Ratio Performance 10 A Quick Look at the Controls 11 Operation 12 Changing Channels Using the Controls on the Microphone 13 L...

Page 5: ...46 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 Do not mount the CB where it could damage or interfere with the...

Page 6: ...the plug s locking nut clockwise 3 Slide the microphone onto the microphone holder To disconnect the microphone unscrew the locking nut and gently pull out the microphone plug Caution Always grasp th...

Page 7: ...eas that produce extreme heat USING VEHICLE BATTERY POWER You can power this CB from your vehi cle s battery or from standard AC power with an optional DC power supply For in formation on using AC pow...

Page 8: ...to remove the antenna DO NOT attempt to do so yourself 2 Route the antenna cable to the CB then connect the cable to ANTENNA on the back of the CB 3 Plug the single connector end of the power cord int...

Page 9: ...teps to adjust the standing wave ratio Note The SWR on some mobile and base station antennas cannot be changed 1 Turn on the CB by turning OFF VOL UME clockwise until it clicks 2 Set S RF SWR CAL to C...

Page 10: ...rade with a subsequent rise in the SWR Anytime you notice that the SWR reading is greater than 3 1 check the condi tion of the antenna the antenna cable and all antenna connectors and hardware Ratio R...

Page 11: ...brate Switch CB Weather Alert Pub lic Address Switch Noise Blanking On Off Switch Audio Clarity Enhancer On Off Switch Channel Display Transmit Receive Indicator Weather Alert Indicator Squelch Contro...

Page 12: ...ly tune channels turn the tuning control beneath the display to select a channel The selected channel number appears and the SWR RF Signal Meter shows the signal strength To quickly tune to Channel 9...

Page 13: ...of your transmis sion Note Do not speak too loudly when transmitting It does not make your signal any stronger and might dis tort your transmission 3 When you finish transmitting release the microphon...

Page 14: ...ceives this signal tone WX ALERT lights orange regardless of the position of CB WX PA NOAA transmits this tone for 5 to 10 seconds If the TRC 446 is set to CB or PA the orange light remains on even af...

Page 15: ...in traffic or that you will stop by the store on the way home If you are a two or more car family CBs are great for inter car communi cations while family members are going places Contact friends or...

Page 16: ...eived and under stood 10 5 Relay information to ______ 10 6 I am busy or are you busy 10 7 Out of service 10 8 In service 10 9 Repeat last message 10 10 Negative NO 10 11 ____________in service 10 12...

Page 17: ...ed by spark plugs or the ignition of your car or another radio might be more than the circuit can com pensate for If you suspect engine noise as a source turn off the engine and operate the CB with th...

Page 18: ...A on the rear of the radio and attached securely to the antenna at the other end Transmission difficulties The CB is turned on OFF VOLUME is at a sufficient listening level The microphone is securely...

Page 19: ...stort 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...

Page 20: ...at 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 counterclockwi...

Page 21: ...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 V to 1 mV TRANSMITTER Output Power 4...

Page 22: ...wer 1 2 Amps WEATHER RADIO Frequency Coverage MHz 162 400 162 425 162 450 162 475 162 500 162 525 162 550 Specifications are typical individual units might vary Specifications are subject to change an...

Page 23: ...23 NOTES 21 1574 fm Page 23 Thursday May 13 1999 4 03 PM...

Page 24: ...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 correc...

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