Cobra Electronics 21 LTD Two-Way Radio User Manual


 
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The COBRA CB transceiver is specifically designed for the environment encoun-
tered in mobile installations. The use of all solid state circuitry and its light weight
result in high reliability. Should a failure occur, however, review the following,
then if necessary, replace parts only with identical parts. Do not substitute. Refer
to the schematic diagram and parts.
1. Check connections to the source of power and make sure it is the 13.8 VDC
required to operate your radio.
2. Check the fuse in the DC power cord. The main power lead (red wire) has a
2 Amp 3AG type fuse in its holder. Use only the above specified type and
size fuse for maximum protection. Failure to do so, will void the warranty.
3. Make certain the microphone is properly plugged in.
4. Make certain the antenna is properly connected and tuned for minimum
SWR. NOTE: COBRA antennas include full instructions as to how to tune
your antenna. If you're still in doubt about the procedure, contact the
COBRA dealer from whom you purchased your radio and antenna, for
advice. If you hired an installer to install your radio and antenna, contact the
installer.
If you are unable to correct the problem, refer the WARRANTY SERVICE
INSTRUCTIONS at the end of this manual for the correct procedure for warranty
and post-warranty service from COBRA.
Adjustment Warning
Replacement or substitution of certain parts with replacements other than those
recommended by COBRA, may be a violation of the technical regulations of Part
95 of the FCC Rules, or of Type Acceptance requirements of Part 2 of said rules.
When making adjustments other than transmitter adjustments, be sure to re-read
applicable portions of this instruction manual to make certain you are following
correct procedure and that the radio was properly installed, etc.
For technical assistance, please call our Automated Help Desk
which can assist you by answering the most
frequently asked questions about Cobra products.
(773) 889-3087
24 hours a day, 7 days a week.
A Consumer Service Representative can be reached through this same
number 8:00 am - 8:00 pm, Monday through Friday, CST.
Technical assistance is also available on-line in the Frequently Asked
Question (FAQ) section at www.cobraelec.com or by e-mail
to productinfo@cobraelec.com
Maintenance and Adjustment
Appendix
Citizens Band radio operators have largely adopted the “10-code” for standard
questions and answers. Its use permits faster communications and better under-
standing in noisy areas. The following table lists some of the more common codes
and their meanings:
Code Meaning Code Meaning
10-1 Receiving poorly 10-35 Confidential information
10-2 Receiving well 10-36 Correct time is
10-3 Stop transmitting 10-37 Wrecker needed at
10-4 OK, message received 10-38 Ambulance needed at
10-5 Relay message 10-39 Your message delivered
10-6 Busy, stand by 10-41 Please turn to channel
10-7 Out of service, leaving air 10-42 Traffic accident at
10-8 In service, subject to call 10-43 Traffic Tie up at
10-9 Repeat message 10-44 I have a message for you
10-10 Transmission completed, 10-45 All units within range
standing by please report
10-11 Talking too rapidly 10-50 Break channel
10-12 Visitors present 10-60
What is next message number?
10-13 Advise Weather/Road 10-62 Unable to copy, use phone
conditions 10-63 Net directed to
10-16 Make pick up at 10-64 Net clear
10-17 Urgent business 10-65 Awaiting your next
10-18 Anything for us? message/assignment
10-19 Nothing for you, return 10-67 All units copy
to base 10-70 Fire at
10-20 My location is 10-71 Proceed with transmission
10-21 Call by telephone in sequence
10-22 Report in person to 10-77 Negative contact
10-23 Stand by 10-81 Reserve hotel room for
10-24 Completed last assignment 10-82 Reserve room for
10-25 Can you contact 10-84 My telephone number is
10-26 Disregard last information 10-85 My address is
10-27 I am moving to channel 10-91 Talk closer to mike
10-28 Identify your station 10-93 Check my frequency on
10-29 Time is up for contact this channel
10-30 Does not conform to FCC rules 10-94 Please give me a long count
10-32 I will give you a radio check 10-99 Mission completed, all
10-33 EMERGENCY TRAFFIC units secure
10-34 Trouble at this station 10-200 Police needed at
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