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• Type and quality of the antenna.
• Height of the antenna’s mounting location (the higher the
antenna, the better the signal’s range).
• Surrounding terrain (mountains and tall buildings limit the range).
• Weather conditions.
• Number of nearby CBs operating on the same channel.
Note: Your CB radio’s transmission range is generally line-of-
sight. To ensure maximum range, always keep the battery
pack fully charged or use fresh batteries.
Common 10-Codes
Citizens Band radio operators have largely adopted the 10-
codes for standard questions and answers. These codes permit
faster communication and better understanding in noisy areas.
The following table lists some of the more common codes and
their meanings:
Code Meaning Code Meaning
10-1 Receiving poorly 10-22 Report in person to____
10-2 Receiving well 10-23 Stand by
10-3 Stop transmitting 10-25 Can you contact____
10-4 OK, message received 10-26 Disregard last information
10-5 Relay message 10-27 I am moving to channel
10-6 Busy, stand by 10-28 Identify your station
10-7 Out of service 10-32 I will give you a radio check
10-8 In service 10-33 Emergency trafc
10-9 Repeat message 10-36 Correct time is____
10-10
Transmission completed,
standing by
10-37 Wrecker needed at____
10-11 Talking too rapidly 10-38 Ambulance needed at____
10-12 Visitors present 10-41 Please turn to channel____
10-13
Advise Weather/Road
conditions
10-42 Trafc accident at____
10-17 Urgent business 10-43 Trafc tie-up at____
10-18 Anything for us? 10-50 Break channel
10-19 Nothing for you. Return to base 10-62 Unable to copy; use telephone
10-20 My location is____ 10-70 Fire at____
10-21 Call by telephone
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