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Additional Information

Make all CB power and antenna wires as short as possible.

Route the power wires away from the antenna wires.

Be sure that the chassis ground connection is secure.

Replace old ignition wires with new, high-voltage, noise suppression wires.

Install noise suppressors on your spark plugs, or install new spark plugs 
that have built-in noise suppressors.

If problems persist, check your vehicle’s alternator/generator and regulator 
gauges. You can reduce the noise from these sources by using bypass 
capacitors at the various output voltage points.

Your local 

RadioShack

 store has a wide selection of noise suppression 

accessories.

Care and Service

Service

Keep the CB dry; if it gets wet, wipe it dry immediately. Use and store the CB 
only in normal temperature environments. Handle the CB carefully; do not 
drop it. Keep the CB away from dust and dirt, and wipe it with a damp cloth 
occasionally to keep it looking new.

If your CB is not performing as it should, take it to your local 

RadioShack

 store 

for assistance. To locate your nearest 

RadioShack

, use the store locator feature 

on RadioShack’s web site (www.radioshack.com), or call 1-800-THE-SHACK 
(843-7422) and follow the menu options. Modifying or tampering with the CB’s 
internal components can cause a malfunction and might invalidate its warranty 
and void your FCC authorization to operate it.

Replacing the Fuse

The CB’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 (not 
supplied).
1.

Make sure the power source and CB are both off.

2.

Hold the fuse holder by both ends, push the ends 
together, twist one end, and pull them apart.

3.

Remove the old fuse and inspect its condition. If it is 
blown, insert a new one of the same type and rating. 
If it is not blown, reinsert it.

4.

Push the fuse holder ends together and twist one 
end.

Fuse holder

Fuse

Summary of Contents for 21-1703 A

Page 1: ...and using your new product 21 1703 A CB Radio Microphone Holder Mounting Bracket 5mm Machine Screw 2 3mm Machine Screw 2 5mm Self tapping Screw 2 3mm Self tapping Screw 2 Spring Washer 2 big 4 small P...

Page 2: ...ng the Transceiver 8 Operation 9 Receiving Transmissions and Adjusting Squelch 9 Transmitting 9 Selecting the Emergency Channel 9 Operational Hints 10 Common Uses for CB Radios 10 Transmission Courtes...

Page 3: ...superior channel selectivity and freedom from adjacent channel interference Automatic Modulation Control prevents the transmitter signal from over modulating and distorting Product Features TX RX Show...

Page 4: ...le such as the dashboard follow these steps 1 Using the holder as a template mark the positions for the mounting screw holes at the desired location 2 At each marked position drill a hole slightly sma...

Page 5: ...points The most common mounting location for this CB is under the vehicle s dashboard However if you plan to use the CB as a base station you can place it on a desk shelf or table see Using the Trans...

Page 6: ...he vehicle as far as possible from sources of electrical noise vertically To take advantage of your CB s maximum range you can adjust the antenna s standing wave ratio SWR using an SWR meter not suppl...

Page 7: ...ver pull on the microphone never pull on the microphone cable Connecting an External Speaker Your transceiver also can be connected to an external CB speaker not supplied Note When you connect an exte...

Page 8: ...connector Warning Use extreme caution when you install or remove a base station CB antenna If the antenna starts to fall let it go It could contact overhead power lines If the antenna touches a power...

Page 9: ...ween transmissions but you will also hear weak transmissions those not strong enough to break through a higher squelch setting Transmitting Follow steps 1 5 in Receiving Transmissions and Adjusting SQ...

Page 10: ...ring more fun for camping shing and other sports help locate a friend or nd out what s cooking back at camp Transmission Courtesy Wait for a pause in someone else s transmission before you ask for a b...

Page 11: ...is your location 10 21 Call ___ by telephone 10 22 Cancel last message 10 23 ___ arrived at the scene 10 24 ___ assignment complete 10 25 Meet ___ 10 26 Estimated time of arrival is ___ 10 30 Use caut...

Page 12: ...ng channel Switch to an active channel PUSH TO TALK is not rmly pressed down Press PTT completely The CB does not work at all Secure connections The fuse may need replacing See Replacing the Fuse on p...

Page 13: ...m dust and dirt and wipe it with a damp cloth occasionally to keep it looking new If your CB is not performing as it should take it to your local RadioShack store for assistance To locate your nearest...

Page 14: ...27 405 MHz Frequency tolerance 1300 Hz Carrier power at no modulation 4 watts Spurious emission 67 dB Current drain at no modulation 1300 mA Modulation frequency response for 450 2500 Hz 6 dB Microph...

Page 15: ...ion of a Class D CB We have provided a copy of these regulations with your CB Do not open your CB to make any internal adjustments Any internal adjustments can be made only by an authorized service te...

Page 16: ...ntal or consequential damages so the above limitations or exclusions may not apply to you In the event of a product defect during the warranty period take the product and the RadioShack sales receipt...

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