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21-1650.fm Page 1 Thursday, August 5, 1999 11:43 AM
OWNER’S MANUAL Cat. No. 21-1650
TRC-237
40-Channel 5-Watt
CB Walkie Talkie
with Channel 9/19 Priority Switch
Please read before using this equipment.
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21-1650.fm Page 2 Thursday, August 5, 1999 11:43 AM FEATURES Your RadioShack TRC-237 40-Channel 5- Watt CB Walkie Talkie with Channel 9/19 Priority Switch is a portable, two-way radio you can carry almost anywhere. The chan- nel priority switch lets you quickly switch to either Channel 9 to report emergency situ- ations, or to Channel 19 to transmit and re- ceive information about road and traffic conditions. You can use your TRC-237 around the house, in your office, or in your car or boat. Y
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21-1650.fm Page 3 Thursday, August 5, 1999 11:43 AM 2-Digit LED Display — lets you easily see the selected channel number. Automatic Noise Limiter (ANL) Circuit — reduces noise caused by nearby elec- trical equipment such as motors or auto- motive ignition systems. Battery Test Button and Battery Indica- tor — lets you check the batteries’ condi- tion to find out if they need replacing. Flexible Antenna with BNC Connector — provides excellent reception and trans- mission, and is designed to h
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21-1650.fm Page 4 Thursday, August 5, 1999 11:43 AM FCC INFORMATION The Federal Communications Commis- sion (FCC) does not require you to have a license to operate this walkie talkie. 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 provided a copy of these regulations with your TRC-237. Internal adjustments and/or modifications can lead to illegal operation as defined by Part 95 of FCC Rules. Such illegal o
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21-1650.fm Page 5 Thursday, August 5, 1999 11:43 AM CONTENTS Powering the CB ................................ 6 Using the POWER Jack and ALKALINE/NI-CD Switch .................. 6 Using Batteries ................................. 7 Testing the Battery Power .......... 10 Recharging Nickel-Cadmium Batteries ..................................... 10 Using Vehicle Battery Power........... 12 Using AC Power ............................. 13 Connecting the Antenna .................. 15 Connecting an
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21-1650.fm Page 6 Thursday, August 5, 1999 11:43 AM POWERING THE CB You can power your TRC-237 from any of these sources (none supplied): • Eight AA alkaline batteries with the two supplied dummy batteries • Ten rechargeable AA nickel- cadmium batteries • 12-volt vehicle battery power using a fused power cord • Standard AC power using a power supply USING THE POWER JACK AND ALKALINE/NI-CD SWITCH POWER The jack lets you connect an ex- ternal power source (such as your vehi- cle’s battery po
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21-1650.fm Page 7 Thursday, August 5, 1999 11:43 AM •Set it to ALKALINE before you con- nect an external power source (vehi- cle battery power or AC adapter) to the POWER jack or while you are us- ing internal batteries (alkaline or re- chargeable). •Set it to NI-CD only when you con- nect a battery charger to the POWER jack to charge the installed recharge- able batteries. Warning: To avoid injuring yourself or damaging the TRC-237, connect a bat- tery charger to the POWER jack only when ni
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21-1650.fm Page 8 Thursday, August 5, 1999 11:43 AM Cautions: • Always use fresh, or freshly charged, batteries of the required size and recommended type. • Do not mix old and new batteries, different types of batteries (stan- dard, alkaline, or rechargeable nickel-cadmium), or rechargeable batteries of different capacities. Follow these steps to install the batteries. 1. If the TRC-237 is on, turn OFF/VOLUME fully counterclockwise until it clicks to turn it off. 2. Slide the strap on the bac
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21-1650.fm Page 9 Thursday, August 5, 1999 11:43 AM 4. Be sure ALKALINE/NI-CD inside the battery compartment is set to ALKA- LINE. 5. Put eight AA alkaline batteries and the two supplied dummy batteries, or ten AA nickel-cadmium batteries into the battery compartment, as indi- cated by the polarity symbols (+ and –) marked inside. Note: Before you use the TRC-237 with nickel-cadmium batteries, you need to charge the batteries (see “Recharging Nickel-Cadmium Batter- ies” on Page 10). 6. Repla
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21-1650.fm Page 10 Thursday, August 5, 1999 11:43 AM Testing the Battery Power 1. Turn on the TRC-237 by rotating OFF/VOLUME clockwise until it clicks. 2. Hold down BATT TEST. If the indica- tor lights, there is enough battery power to operate the CB. If the indi- cator is dim or does not light, replace or recharge the batteries. Recharging Nickel-Cadmium Batteries You can use a battery charger, Cat. No. 23-249 (not supplied), to charge or re- charge nickel-cadmium batteries while they are i
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21-1650.fm Page 11 Thursday, August 5, 1999 11:43 AM Follow these steps to charge nickel- cadmium batteries in the TRC-237. 1. If the TRC-237 is on, turn OFF/VOLUME fully counterclockwise until it clicks to turn it off. 2. Set ALKALINE/NI-CD inside the bat- tery compartment to NI-CD (see “Us- ing the Power Jack and ALKALINE/ NI-CD Switch” on Page 6). 3. Connect the battery charger’s 5.5 mm outer diameter./2.1 mm inner diameter barrel plug to the POWER jack on the side of the TRC-237, then plu
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21-1650.fm Page 12 Thursday, August 5, 1999 11:43 AM Note: You can use an external charger (such as Cat. No. 23-134, not sup- plied) to recharge the nickel-cadmium batteries. After removing the batteries from the TRC-237, follow the instructions that come with the external charger. Important: Your TRC-237 is capable of using nickel-cadmium batteries. At the end of the batteries’ useful life, they must be re- cycled or disposed of properly. Contact your local, county, or state hazardous waste
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21-1650.fm Page 13 Thursday, August 5, 1999 11:43 AM • When you finish using the TRC-237, unplug the fused cord from the ciga- rette-lighter socket before you dis- connect it from your TRC-237. 1. If the TRC-237 is on, turn OFF/VOL- UME fully counterclockwise until it clicks to turn it off. 2. Be sure ALKALINE/NI-CD inside the battery compartment is set to ALKA- LINE. 3. Insert the power cord’s 5.5 mm outer diameter/2.1 mm inner diameter bar- rel plug into the POWER jack. 4. Plug the power c
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21-1650.fm Page 14 Thursday, August 5, 1999 11:43 AM Cautions: • The power supply must be able to deliver 12 volts and at least 1200 mil- liamps of power. The recommended power supply meets these specifica- tions. Using a power supply that does not meet these specifications could damage the TRC-237 or the power supply. • You must use a DC fused cord that supplies 12 volts and delivers at least 1200 milliamps of power. Its center tip must be set to positive, and its barrel plug must correctly
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21-1650.fm Page 15 Thursday, August 5, 1999 11:43 AM Note: If the TRC-237 does not operate when you use the DC fused cord, turn the power supply off, unplug the cord from the power supply’s power socket, then clean any debris from the socket. If your TRC- 237 still does not work, check the fuse in the DC fused cord and replace it if neces- sary. CONNECTING THE ANTENNA Caution: To prevent damage to your TRC-237, you must connect an antenna before you operate it. Follow these steps to attach
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21-1650.fm Page 16 Thursday, August 5, 1999 11:43 AM Connecting an Optional Antenna Your walkie talkie comes with a flexible antenna that is ideal for most applications. However, the walkie talkie’s antenna jack makes it easy to connect other types of antennas, too. For mobile or base station use, you might want to connect an option- al external antenna. Your local Ra- dioShack store carries a wide selection of external mobile or outdoor base- stationantennas. Choose the one that best meets
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21-1650.fm Page 17 Thursday, August 5, 1999 11:43 AM Follow the installation instructions sup- plied with the antenna, route the antenna cable to the TRC-237, then connect it to the antenna jack. Cautions: • Do not run the cable over sharp edges or moving parts. • Do not run the cable next to power cables or other CB antenna cables. • Do not run the cable through a vehi- cle’s engine compartment or other areas that produce extreme heat. • Follow all cautions and warnings included with the ant
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21-1650.fm Page 18 Thursday, August 5, 1999 11:43 AM OPERATION Before you use your TRC-237, we recom- mend you read “CB Operation Tips” on Page21, which contains information to help you use it effectively and courteously. RECEIVING TRANSMISSIONS AND ADJUSTING SQUELCH 1. If you did not connect an external antenna, hold the TRC-237 so the antenna is vertical. 2. Turn on the TRC-237 by turning OFF/ VOLUME clockwise until you hear a click and a hissing sound. 3. Set OUT – CH9 – CH19 on top of t
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21-1650.fm Page 19 Thursday, August 5, 1999 11:43 AM To redisplay the channel number for about 20 seconds, simply press and release DISPLAY. 4. If you set OUT – CH9 – CH19 to OUT, repeatedly press CH s to select higher channels, or CH t to select lower channels. To move rapidly through the channels, hold down CH s or t. 5. Adjust OFF/VOLUME to a comfortable listening level. 6. Adjust SQUELCH to cut out the back- ground noise. Wait until there is no signal on the channel, then slowly turn SQUE
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21-1650.fm Page 20 Thursday, August 5, 1999 11:43 AM Note: Do not turn SQUELCH too far clockwise because you might also cut out weak signals. 7. To turn off the TRC-237, turn OFF/ VOLUME toward OFF until it clicks. TRANSMITTING 1. Follow Steps 1–6 in “Receiving Transmissions and Adjusting Squelch” on Page 18. 2. Hold the TRC-237 2 to 3 inches from your mouth. Press and hold PUSH TO TALK on the side of the TRC-237. TX on the front of the TRC-237 lights. Speak into the microphone. MOD lights. W
