Cat. No. 21-1628 owner’s manual please read before using this equipment. Trc-239 40-channel, 4-watt cb walkie-talkie 21-1628.Fm page 1 tuesday, january 25, 2000 9:30 am.
2 features your radioshack trc-239 40-channel, 4-watt cb walkie-talkie is a portable, easy-to-use, two-way ra- dio that you can carry almost anywhere. It will give you reliable communications in many different appli- cations. You can use your trc-239 around the house, in your office, car or boat or ...
3 rotary volume and squelch controls —mean faster, easier operation under virtually any condition. Automatic modulation limiter — prevents over- modulation to ensure a clear sound. Automatic noise limiter — reduces noise caused by nearby electrical equipment such as motors or au- tomotive ignition s...
4 fcc information the federal communications commission (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 provided a copy of these regulations with y...
5 contents preparation ........................................................... 6 powering the cb ............................................. 6 using the power jack and ni/al switch ............................................ 6 using batteries ............................................... 7 ...
6 preparation powering the cb you can power your trc-239 from any of these sources: • internal batteries (not supplied) • vehicle battery power (using an optional adapter) • household ac power (using an optional adapter) using the power jack and ni/al switch the power jack lets you connect an extern...
7 • set ni/al to ni to use rechargeable batteries inside the trc-239 warning: to avoid injuring yourself or damaging the trc-239, connect a battery charger to power only when using ni-cd or ni-mh batteries. Using batteries your trc-239 can use 9 aa batteries (not supplied) for power. For the best pe...
8 when the tx/batt indicator lights steadily or the trc-239 stops operating properly, replace the bat- teries. Warning: dispose of old batteries promptly and properly. Do not burn or bury them. Caution: if you do not plan to use the trc-239 with internal batteries for several months, remove the bat-...
9 4. Plug the charger's other end into a standard ac outlet. It takes 14–16 hours to recharge ni-mh batter- ies or 7–8 hours to recharge ni-cd batteries that are fully discharged. 5. When the batteries are fully charged, unplug the charger from the ac outlet, then disconnect the charger from the cb....
10 might be available are: municipal curbside collection, drop-off boxes at retailers such as your local ra- dioshack store, recycling collection centers, and mail-back programs. Using vehicle battery power you can power the trc-239 from a vehicle’s 12v power source (such as cigarette-lighter socket...
11 follow these steps to connect the trc-239 to your vehicle’s battery power. 1. Plug the power cord’s adaptaplug into the trc- 239’s power jack. 2. Connect the other end of the power cord to your vehicle’s cigarette lighter socket. Using ac power you can power the trc-239 using an optional dc power...
12 you finish, disconnect the power supply from ac power before you disconnect the power cord from the trc-239. If batteries are installed for portable use, make sure ni/al inside the battery compartment is set to the correct position (see “using batteries” on page 7). Follow these steps to connect ...
13 1. Align the slots around the antenna’s connector with the tabs on the antenna jack on top of the trc-239. 2. Press the antenna down over the jack and turn the antenna’s base clockwise until it locks. To remove the antenna, turn the antenna’s base counterclockwise until it unlocks, then lift it o...
14 note: when connecting an optional antenna, always use 50-ohm coaxial cable such as rg-58. For lengths over 50 feet, use low-loss rg-8 coaxial ca- ble. When the cable terminates in a pl-259 connec- tor, obtain an adapter to fit the bnc connector. Follow the installation instructions supplied with ...
15 operation before you start using your trc-239, we recom- mend you read “cb operation tips” on page 17, which contains information to help you use the trc- 239 effectively and courteously. Receiving transmissions and adjusting squelch caution: before receiving or transmitting, always connect the a...
16 2. Based on your desired transmitting range, set the power level as follows . • to increase the transmitted signal strength and the trc-239's range, set pwr hi/lo to hi . • to decrease the transmitted signal strength (to prevent overloading a nearby cb) and save battery power, set pwr hi/lo to lo...
17 cb operation tips like most activities, cb radio users have customs and courtesies. The following tips will help you get the most enjoyment out of your cb. Typical uses for a cb radio business uses • truck drivers and delivery personnel can learn road and traffic conditions and get assistance in ...
18 • ever have car trouble or run out of gas on the highway? With your cb you can have peace of mind knowing you can call for assistance. • camping, fishing, and other sports are more fun with a cb. Keep in touch with a buddy or find out “what's cooking” back at camp. Cb courtesy • wait for a pause ...
19 using common 10-codes citizen’s band operators have largely adopted the 10-codes for standard questions and answers. These codes permit faster communication and better intelligibility in noisy areas. While not all codes are listed, most of the more popular ones follow. Code meaning 10-1 receiving...
20 note: although this table lists the 10-codes’ mean- ings in the form of a statement, they can also be phrased as questions (10-6: are you busy?, 10-20: what is your location?). 10-23 please stand by. 10-25 can you contact____. 10-26 disregard last informa- tion. 10-27 i am moving to channel____. ...
21 maximum range the maximum range and quality of cb transmissions vary depending on the following typical conditions: • the type and quality of antenna used • the height of the antenna's mounting location — the higher the antenna, the greater the signal's range • the surrounding terrain — mountains...
22 care and maintenance your radioshack trc-239, 40-channel, 4-watt, cb walkie-talkie 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 co...
23 specifications receiver frequency coverage ............. 26.965 to 27.405 mhz audio output ............................ 400 mw (10% thd) intermediate frequency ............. 1st if: 10.695 mhz 2nd if: 455 khz transmitter frequency coverage ............. 26.965 to 27.405 mhz output power ............
937568 01a00 printed in thailand 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 company- owned stores and authorized radioshack franchisees a...
