21-1615.fm Page 1 Thursday, August 5, 1999 11:07 AM OWNER’S MANUAL Cat. No. 21-1615 TRC-93 300 mW 3-Channel Walkie-Talkie Please read before using this equipment.
Three-Channel Operation — comes with Channel 14 crystals installed, but lets you install optional crystals so you can oper- ate the TRC-93 on any two of the other 39 available CB channels. (See “Adding Crystals” on Page 15). Built-In Modulation Limiter Circuit —...
• Never open your TRC-93’s case except to install or change crystals. • Never modify your TRC-93. Your TRC-93 might cause TV or radio in- terference even when it is operating prop- erly. To determine whether your TRC-93 is causing the interference, turn off your TRC-93.
21-1615.fm Page 4 Thursday, August 5, 1999 11:07 AM CONTENTS Preparation ......... 5 Installing Batteries ......5 Testing the Battery Power ..6 Using the Belt Clip......7 Operation ..........8 Receiving Transmissions ....8 Transmitting ........9 CB Operation Tips ......11 Common Uses for a CB Radio ..
21-1615.fm Page 5 Thursday, August 5, 1999 11:07 AM PREPARATION INSTALLING BATTERIES Your TRC-93 requires six AA alkaline bat- teries (such as RadioShack Cat. No. 23- 552) for power. Cautions: • Always use fresh batteries of the required size and type.
Do not force it. 5. Replace the battery compartment cover. Note: If you will not be using the TRC-93 for several months, remove the batteries. Testing the Battery Power 1. Make sure the TRC-93 is turned on...
USING THE BELT CLIP To attach the supplied belt clip to the TRC-93, press the clip’s tabs into the cor- responding holes on the back of the TRC- 93. Then push the clip upward until it locks into place.
21-1615.fm Page 8 Thursday, August 5, 1999 11:07 AM OPERATION Before you use your TRC-93, we recom- mend you read “CB Operation Tips” on Page 11, which contains information to help you use it effectively and courteous- RECEIVING TRANSMISSIONS 1. Fully extend the TRC-93’s telescop- ing antenna and hold the TRC-93 so the antenna is vertical.
Note: You might not hear a hissing sound if is set to CHANNEL and you haven’t installed any crys- tals in channel positions B or C. 4. To turn off the TRC-93, turn OFF/VOL up toward until it clicks. TRANSMITTING 1. Follow Steps 1–3 in “Receiving Transmissions”...
If you have installed the necessary crystals in your TRC-93 and you are using Channel 9, always give emergency messages priority. 3. To turn off the TRC-93, turn OFF/VOL up toward until it clicks.
21-1615.fm Page 11 Thursday, August 5, 1999 11:07 AM CB OPERATION TIPS The following tips will help you get the most enjoyment from your TRC-93. COMMON USES FOR A CB RADIO Business Uses • Truck drivers and delivery personnel can learn road and traffic conditions and get assistance in locating desti- nations.
21-1615.fm Page 12 Thursday, August 5, 1999 11:07 AM • Camping, fishing, and other sports are more fun with a walkie-talkie. Locate a friend or find out “what’s cooking” back at camp. USING COMMON 10-CODES Citizen’s band operators have largely adopted the 10-codes for standard ques- tions and answers.
21-1615.fm Page 13 Thursday, August 5, 1999 11:07 AM Code Meaning 10-15 Message delivered. 10-16 Reply to message. 10-17 En route. 10-18 Urgent. 10-19 Contact __________. 10-20 My location is __________. 10-21 Call ________ by telephone. 10-22 Cancel last message. 10-23 Arrived at the scene.
• Amount of power in the batteries • The surrounding terrain—mountains and tall buildings limit the range • Weather conditions • The number of nearby CBs operating on the same channel To ensure maximum range, always keep fresh alkaline batteries in your TRC-93.
TRC-93, available from your local Ra- dioShack store. Be sure to specify the channel you want and the TRC-93’s cata- log number (Cat. No. 21-1615). Note: Channel A crystals are soldered in, and can be replaced only by a qualified technician.
27.405 26.950 Note: A crystal is marked with its fre- quency. Follow these steps to change or install crystals in your TRC-93. 1. Remove the battery compartment cover by pressing down on the cover’s arrow, then sliding the cover down.
21-1615.fm Page 17 Thursday, August 5, 1999 11:07 AM 2. Remove the battery case. 3. Use a Phillips screwdriver to remove the back cover’s two screws. 4. Firmly grasp the TRC-93’s front and back cover’s sides and carefully pull the back cover away from the front cover.
21-1615.fm Page 18 Thursday, August 5, 1999 11:07 AM (some circuitry details left out for clarity) 6. When you have finished installing new crystals, carefully fit the TRC- 93’s front and back cover’s sides together, then gently squeeze them together. Replace the back cover’s two screws, replace the battery case, then replace the battery compart- ment cover.
21-1615.fm Page 19 Thursday, August 5, 1999 11:07 AM TROUBLESHOOTING If your TRC-93 is not working as it should, follow these suggestions to see if you can eliminate the problem. If you cannot, take it to your local RadioShack store for assis- tance.
Your RadioShack TRC-93 300 mW 3- Channel Walkie-Talkie is an example of superior design and craftsmanship. The following suggestions will help you care for your TRC-93 so you can enjoy it for years. Keep the TRC-93 dry. If it gets wet, wipe it dry immedi- ately.
21-1615.fm Page 21 Thursday, August 5, 1999 11:07 AM SPECIFICATIONS Receiver – Frequency Coverage ... 26.965 27.405 MHz (Supplied with Channel 14 (27.125 MHz) crystals in the Channel A position) Sensitivity ....2 µV for 10 dB (S+N)/N Adjacent Channel Selectivity ....15 dB Audio Output (10% THD) ....
21-1615.fm Page 22 Thursday, August 5, 1999 11:07 AM NOTES...
21-1615.fm Page 23 Thursday, August 5, 1999 11:07 AM...
21-1615.fm Page 24 Thursday, August 5, 1999 11:07 AM Limited Ninety-Day Warranty This product is warranted by RadioShack against manu- facturing defects in material and workmanship under nor- mal use for ninety (90) days from the date of purchase from RadioShack company-owned stores and authorized RadioShack franchisees and dealers.