21-1702.fm Page 1 Thursday, August 5, 1999 1:02 PM Cat. No. 21-1702 OWNER’S MANUAL Please read before using this equipment.
1-1702.fm Page 2 Thursday, August 5, 1999 1:02 PM FEATURES Your RadioShack TRC-502 40-Channel Mini Mobile CB Radio is a great way to communicate with other CB radio operators. Because of its convenient compact size, you can use it just about anywhere. You can mount it in a vehicle for mobile use, or in your home or office for use as a base station. Your CB has these advanced features. Up/Down Channel Selector — lets you easily select a channel with the press of a button.
21-1702.fm Page 3 Thursday, August 5, 1999 1:02 PM FCC INFORMATION The Federal Communications Commission (FCC) does not require you to have a license to operate this CB radio. However, you must know Part 95 of FCC Rules. These rules apply to the operation of a Class D CB. We have provided a copy of these regulations with your CB radio. This device complies with Part 95 of FCC Rules.
21-1702.fm Page 4 Thursday, August 5, 1999 1:02 PM CONTENTS Installation ............................................................................................................... Mounting the Microphone Holder ....................................................................... Mounting the CB ................................................................................................. Connecting an Antenna ......................................................................................
21-1702.fm Page 5 Thursday, August 5, 1999 1:02 PM INSTALLATION MOUNTING THE MICROPHONE HOLDER You can mount the microphone holder to either side of the CB or to another location near your receiver. Caution: Be careful not to drill into anything behind the mounting surface. 3. Mount the holder using the machine screws, spring washers, plain washers and nuts.
21-1702.fm Page 6 Thursday, August 5, 1999 1:02 PM • the CB is not directly in front of heating vents. • all wires and cables can reach their connection point. Cautions: 3. Mount the bracket to the mounting surface with the 1/5-inch (5-mm) mounting screws, spring washers, plain washers, and nuts. Mounting Surface • If you use the CB in a vehicle, mount it securely to avoid damage to the CB or vehicle or injury to passengers.
21-1702.fm Page 7 Thursday, August 5, 1999 1:02 PM When you choose an antenna, keep in mind that, for the best performance, you should mount the antenna: • as high as possible on your vehicle, home or building 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 generally acceptable, with readings of 1.5:1 or lower being more desirable.
21-1702.fm Page 8 Thursday, August 5, 1999 1:02 PM USING VEHICLE BATTERY POWER USING THE CB AS A BASE STATION Follow these steps to connect the CB to vehicle battery power. Although this CB radio is designed mainly for mobile use, you can also use it as a base station with an AC power source. For base station installation, you need these items: 1. Connect the red wire (with in line fuse holder) to a point in your vehicle’s fuse block that has power only when the ignition is in the ACC or ON position.
21-1702.fm Page 9 Thursday, August 5, 1999 1:02 PM Follow these steps to install the CB as a base station. Antenna Wire Black Wire to Negative Terminal of DC Power Supply Red Wire to Positive Terminal of DC Power Supply 1. Mount the base station antenna as described in it’s owner’s manual. 2. Connect the antenna to ANTENNA. 3. Connect the CB’s black power wire to the negative (–) terminal on the DC power supply. 4. Connect the CB’s red wire to the positive (+) terminal on the DC power supply. 5.
21-1702.fm Page 10 Thursday, August 5, 1999 1:02 PM OPERATION Before you use your CB, you should know how to use it effectively and courteously. “Operational Hints” on Page 12 contains information that will help you get more enjoyment from our CB. RECEIVING TRANSMISSIONS AND ADJUSTING SQUELCH 1. Turn SQUELCH fully counterclockwise. 2. Turn on the CB by turning VOLUME clockwise until it clicks. The channel display lights and the channel number appears. 3.
21-1702.fm Page 11 Thursday, August 5, 1999 1:02 PM TRANSMITTING Note: We recommend you try receiving before you transmit. 1. Follow Steps 1–5 in “Receiving Transmissions and Adjusting Squelch” on Page 10. 2. To transmit, press PUSH TO TALK on the microphone. The red TX indicator lights. Hold the microphone 2–3 inches from your mouth and speak in a normal tone of voice. PUSH TO TALK 3. To turn off the CB, turn VOLUME counterclockwise until you hear it click. The channel display turns off.
21-1702.fm Page 12 Thursday, August 5, 1999 1:02 PM OPERATIONAL HINTS Like most activities, CB radio has its customs and courtesies. The following tips will help you get the most enjoyment from your CB. COMMON USES FOR A CB 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.
21-1702.fm Page 13 Thursday, August 5, 1999 1:02 PM USING COMMON 10CODES Code Meaning 10-16 Reply to message. Citizen’s band operators and CB radio users have largely adopted the 10codes for standard questions and answers. These codes permit faster communication and better intelligibility in noisy areas. 10-17 En route. 10-18 Urgent. 10-19 Contact _____. 10-20 What is your location? This table lists codes adopted by the Associated Public Safety Communications Officers (APCO).
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21-1702.fm Page 15 Thursday, August 5, 1999 1:02 PM TROUBLESHOOTING If your CB is not working as it should, follow these suggestions to see if you can eliminate the problem. If you cannot, take the CB to your local RadioShack store for assistance. Symptom CB has trouble receiving. Check/Try Turn CB power on. Microphone connected? Secure connections. Antenna connected? Secure connections. Too much squelch? Adjust as needed. Radio not on an operating channel? Switch to an active channel. Adjust VOLUME.
21-1702.fm Page 16 Thursday, August 5, 1999 1:02 PM CARE AND MAINTENANCE Your RadioShack TRC-502 40-Channel Mini Mobile CB Radio 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 immediately. Liquids might contain minerals that can corrode the electronic circuits. Use and store the CB only in normal temperature environments.
21-1702.fm Page 17 Thursday, August 5, 1999 1:02 PM REPLACING THE FUSE The TRC-502’s 2-amp in-line fuse helps protect your CB from power surges and short circuits. When replacement is required, use a 2-amp, slow-blow glass fuse, such as Cat. No. 270-1023. Caution: Do not use a fuse with ratings other than those specified here. 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.
21-1702.fm Page 18 Thursday, August 5, 1999 1:02 PM SPECIFICATIONS RECEIVER Frequency Coverage .................... All 40 Channels (Class D) 26.965 to 27.405 MHz Sensitivity .................................................................... 0.5 uV or Better for 10 dB S/N Squelch Sensitivity .................................. From 0.5 uV to 1 mV Adjustable (Nominal) Frequency Response .......................................................... – 6 dB 450 Hz to 2.5 kHz Adjacent Channel Selectivity ........
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21-1702.fm Page 20 Thursday, August 5, 1999 1:02 PM Limited Ninety-Day Warranty This product is warranted by RadioShack against manufacturing defects in material and workmanship under normal use for ninety (90) days from the date of purchase from RadioShack companyowned stores and authorized RadioShack franchisees and dealers.
