Radio Shack TRC-503 Owner'S Manual Download Page 1

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Cat. No. 21-1703

OWNER’S MANUAL

Please read before using this equipment.

40 Channel Mobile CB Radio

with Channel 9/19 Priority Switch

TRC-503

21-1703a.fm Page 1 Thursday, August 5, 1999 4:41 PM

Summary of Contents for TRC-503

Page 1: ...Cat No 21 1703 OWNER S MANUAL Please read before using this equipment 40 Channel Mobile CB Radio with Channel 9 19 Priority Switch A TRC 503 21 1703a fm Page 1 Thursday August 5 1999 4 41 PM ...

Page 2: ...uency Synthesizer provides highly accurate and stable tuning Two Built In Ceramic Filters ensure superior channel selectivity and freedom from adjacent channel interference Automatic Modulation Control pre vents the transmitter signal from over modulating and distorting Universal Mounting Bracket lets you mount your CB securely in your ve hicle or on a table or shelf in your home Note To use this ...

Page 3: ... and sure Never open your CB radio s case Never change or replace anything in your CB radio Your CB radio 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 in terference by moving your CB radio away from the receiver contacting you...

Page 4: ... a Base Station 9 Operation 10 Receiving Transmissions and Adjusting Squelch 10 Transmitting 11 Selecting the Emergency Channel 11 Operational Hints 12 Common Uses for a CB 12 Personal Uses 12 Business Uses 12 Transmission Courtesy 12 Using Common 10 Codes 13 Maximum Range 14 Troubleshooting 15 Reducing Noise 16 Care and Maintenance 17 Replacing the Fuse 18 Specifications 19 21 1703a fm Page 4 Thu...

Page 5: ...r face 3 Attach the holder at the mounting location using the supplied 3 mm machine screws spring washers plain washers and nuts Note If you cannot reach behind the mounting surface to attach the nuts on the machine screws use the supplied 3 mm plain washers and self tapping screws MOUNTING THE TRANSCEIVER The most common mounting location for this CB is under a vehicle s dashboard However if you ...

Page 6: ...t to drill into objects behind the mounting sur face 3 Mount the bracket to the mounting surface with the supplied 6 mm bolts spring washers plain wash ers and nuts Note If you cannot reach behind the mounting surface to attach the nuts on the bolts use the supplied 6 mm bolts and plain washers to secure the bracket 4 Attach the CB to the mounting bracket using the supplied rubber washers and moun...

Page 7: ...eme heat To take advantage of your radio s maxi mum range adjust the antenna s Stand ing Wave Ratio SWR using an SWR meter not supplied Follow the instructions supplied with the SWR meter and antenna to adjust your antenna s SWR to the lowest possible value SWR values of 2 0 1 are general ly acceptable with readings of 1 5 1 or lower being more desirable CONNECTING THE MICROPHONE 1 Press the tab o...

Page 8: ...he CB Note When you connect an external speaker the CB s internal speaker dis connects USING VEHICLE BATTERY POWER Follow these steps to connect the trans ceiver to vehicle battery power 1 Connect the red wire with the in line fuse holder on the back of the transceiver to a point in your vehi cle s fuse block that has power only when the ignition is in the ACC accessory or ON position 2 Connect th...

Page 9: ...d contact overhead power lines If the antenna touches a power line contact with the antenna mast ca ble or guy wires can cause electrocu tion and death Call the power company to remove the antenna Do not attempt to do so yourself Follow these steps to install the CB as a base station Mount the base station antenna as de scribed in its owner s manual 1 Connect the antenna to the ANTENNA jack on the...

Page 10: ...l other than an emergency channel 4 Rotate the channel selector until the display shows the desired channel 5 Adjust VOLUME to a comfortable lis tening level 6 To cut out background noise be tween transmissions wait until there is no signal then slowly turn SQUELCH clockwise until the back ground noise stops Note To receive very weak signals turn SQUELCH counterclockwise You hear noise between tra...

Page 11: ...ntil you hear it click The display and RX indicator turn off SELECTING THE EMERGENCY CHANNEL Important Channel 9 and Channel 19 are reserved for motorist assistance and for reporting emergency information about accidents hazardous road condi tions and so on Always give emergen cy messages priority on Channel 9 or Channel 19 To select the emergency Channel 9 or Channel 19 set OUT CH9 CH19 to CH9 or...

Page 12: ...cooking back at camp Business Uses For security officers a CB is more than a convenience it is a must for both safety and efficiency Truck drivers and delivery personnel can learn road and traffic conditions and get assistance in locating desti nations A CB radio is also good company on those long hauls On construction crews a CB radio quickly pays for itself when you are calling for additional ma...

Page 13: ... Message received 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 Stand by 10 13 Report road weather condi tions 10 14 Information 10 15 Message delivered 10 16 Reply to message 10 17 En route 10 18 Urgent 10 19 Contact _____ 10 20 What is your location 10 21 C...

Page 14: ...ting location the higher the antenna the better the signal s range the surrounding terrain moun tains and tall buildings limit the range weather conditions the number of nearby radios operat ing on the same channel standing wave ratio SWR between the antenna and the CB Note Your CB radio s transmission range is generally line of sight 21 1703a fm Page 14 Thursday August 5 1999 4 41 PM ...

Page 15: ...n Release PUSH TO TALK Adjust VOLUME CB has trouble transmit ting Turn transceiver power on Antenna connected Secure connections All connections free of corrosion Clean and tighten Microphone connector loose Firmly press into jack Radio not on operating channel Switch to an active channel PUSH TO TALK fully pressed Press completely Radio does not work at all Power connected Secure connections Micr...

Page 16: ...em Here are a few hints to help you reduce or eliminate such noise Make all CB power and antenna wires as short as possible Route the power wires away from the antenna wires Be sure that the chassis ground connection is secure Replace old ignition wires with new high voltage noise suppression wires Install noise suppressors on your spark plugs or install new spark plugs that have built in noise su...

Page 17: ...t 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 t...

Page 18: ...ere Doing so might damage your CB Follow these steps to replace the fuse 1 Make sure the power source and CB are both off 2 Hold the fuse holder by both ends push the ends together twist one end counterclockwise then pull them apart 3 Remove the old fuse and inspect its condition If it is blown insert a new one of the same type and rating If it is not blown reinsert it 4 Push the fuse holder ends ...

Page 19: ...00 Hz Carrier Power at No Modulation 4 Watts Spurious Emission 67 dB Current Drain at No Modulation 1300 mA Modulation Frequency Response for 450 2500 Hz 6 dB Microphone Sensitivity for 50 Modulation 2 mV GENERAL Power Requirements 13 8 Volts DC Negative Ground Dimensions HWD 13 8 41 4 57 8 inches 35 108 150 mm Weight 1 lb 6 oz 640 g Included Accessories Microphone Hanger Mounting Bracket Specific...

Page 20: ... 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 produc...

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