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. 21-1650.Fm page 1 thursday, august 5, 1999 11:43 am.
2 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 transmi...
3 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- t...
4 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 regul...
5 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 u...
6 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 • te n r e ch a rg e a b le a a n ic k e l- cadmium batteries • 12-volt vehicle battery power using a fused power cord • standard ac power using...
7 • 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 insta...
8 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 i...
9 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 y...
10 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...
11 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 pa...
12 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 batterie...
13 • 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...
14 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 cor...
15 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. Co...
16 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 an...
17 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 th...
18 operation before you use your trc-237, we recom- mend you read “cb operation tips” on page 21, 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...
19 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 ...
20 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 ...
21 cb operation tips the following tips will help you get the most enjoyment from your trc-237. 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. A walkie talkie is also good company on...
22 • 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. Their use permits fast- er communication and be...
23 note: although this table lists the 10- codes’ meanings in the form of a state- ment, they can also be phrased as ques- tions (10-6: are you busy?, 10-20: what is your location?). 10-15 message delivered. 10-16 reply to message. 10-17 en route. 10-18 urgent. 10-19 contact __________. 10-20 my loc...
24 cb courtesy • wait for a pause in someone else’s transmission before you ask for a break. • if you do not receive an answer to your call after a second attempt, sign off and wait several minutes before trying again. • do not press and hold push to talk when you are not talking. (this is called de...
25 troubleshooting if your trc-237 is not working as it should, follow these suggestions to see if you can eliminate the problem. If you can- not, take it to your local radioshack store for assistance. Symptom suggestion weak, bad, or no recep- tion. Be sure the trc-237 is turned on. Be sure the vol...
26 maintenance your radioshack trc-237 40-channel 5-watt cb walkie talkie with channel 9/ 19 priority switch is an example of supe- rior design and craftsmanship. The follow- ing suggestions will help you care for your trc-237 so you can enjoy it for years. Keep the trc-237 dry. If it gets wet, wipe...
27 specifications receiver frequency coverage ... 26.965 – 27.405 mhz sensitivity (max.) ..... 0.5 µ v at 10 db (s+n)/n adjacent channel rejection ................. 45 db squelch ............ Adjustable from 1 µ v to 1 mv audio output (10% thd) ................. 400 mw current drain ...................
Radioshack a division of tandy corporation fort worth, texas 76102 811080960b 4a8 printed in china 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 ra...
