OPERATING INSTRUCTIONS FOR YOUR 40 CHANNEL CITIZENS BAND 2-WAY MOBILE RADIO Model 29 WX ST Cobra Electronics Corporation 6500 W. Cortland Street Chicago, IL 60707 PRINTED IN HONG KONG ©COBRA ELECTRONICS CORP.
The CB Story How To Use Your The Citizens Band lies between the shortwave broadcast and 10-meter Amateur radio bands, and was established by law in 1949. The Class D two-way communications service was opened in 1959. (CB also includes a Class A citizens band and Class C remote control frequencies.) FCC regulations permit only ÒtransmissionsÓ (one party to another) rather than ÒbroadcastsÓ (to a wide audience). Thus, advertising is not allowed on CB Channels because that is Òbroadcasting.
Specifications (cont.) Specifications FREQUENCY RANGE The COBRA 29 WX ST transceiver represents one of the most advanced AM two-way radios ever designed for use as a Class D station in the Citizens Radio Service. This unit features advanced Phase Lock Loop (PLL) circuitry providing complete coverage of all 40 channels as shown below. Channel Channel Frequency in MHz Channel Channel Frequency in MHz 1 2 3 4 5 26.965 26.975 26.985 27.005 27.015 21 22 23 24 25 27.215 27.225 27.255 27.235 27.
Installation Location Plan the location of the transceiver and microphone bracket before starting the installation. Select a location that is convenient for operation and does not interfere with the driver or passengers in the vehicle. In automobiles, the transceiver is usually mounted to the underneath of the dash panel, with the microphone bracket beside it. Installation (Cont.) 3. Connect the antenna cable plug to the standard receptacle on the unit.
Installation (Cont.) Installation (Cont.) CB Antenna Ignition Noise Interference Since the maximum allowable power output of the transmitter is limited by the FCC, the antenna is one important factor affecting transmission distance. Only a properly matched antenna system will allow maximum power transfer from the 50 ohm transmission line to the radiating element. In mobile installations (cars, trucks, boats, etc.), an antenna system that is non-directional should be used.
Operation (Cont.) Operation Controls and Indicators Refer to controls, indicators and connectors as illustrated below: 10 11 12 6. DELTA-TUNE. For normal operation, set this control to the center position. This feature has several uses and can greatly enhance receiver operation. If a received signal is slightly off frequency, the Delta-Tune control can be used to Òfine-tuneÓ your receiver.
Operation (Cont.) Operation (Cont.) 3 14. CH.19/CH.9/NORMAL SWITCH. Used for instant selection of emergency Channel 9 (CH. 9 position) or information Channel 19. In NORMAL position, all 40 CB channels are selected by the CHANNEL SELECTOR switch (9). 15. S-METER. Swings proportionally to the strength of the incoming signal during receiving. The S/RF-SWR-CAL switch must be in the S/RF position. RF-METER.Swings proportionally to the RF output power while transmitting.
Operation (Cont.) Operating Procedure to Transmit 1. Be sure the operator has read and understands part 95, F.C.C. Rules and Regulations prior to operating the transmitter. 2. 3. 4. Select the desired channel. Set the DYNAMIKE control fully clockwise. The receiver and transmitter are controlled by the press-to-talk switch on the microphone. Press the switch and the transmitter is activated; release switch to receive.
Appendix Maintenance and Adjustment The COBRA CB transceiver is specifically designed for the environment encountered 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.
Appendix (Cont.) A Few Rules That Should Be Obeyed 1. 2. 3. 4. 5. 6. You are not allowed to carry on a conversation with another station for more than five minutes at a time without taking a one-minute break to give others a chance to use the channel. You are not allowed to blast others off the air by overpowering them with illegally amplified transmitter power or illegally high antennas. You canÕt use the CB to promote illegal activities. You are not allowed to use profanity.
Warranty and Service Limited Two Year Warranty COBRA ELECTRONICS CORPORATION warrants that its COBRA citizens band (CB) radio, and the component parts thereof, will be free of defects in workmanship and materials for period of two (2) year from the date of first consumer purchase. This warranty may be enforced by the first consumer purchaser, provided that the product is utilized within the U.S.A.