Cobra 2010 GTL WX User Manual Download

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40 CHANNEL

SOLID STATE CITIZENS BAND

SSB/AM TWO-WAY RADIO

BASE STATION

With Seven Weather Channels and

NOAA Emergency Alert Tone

OPERATING INSTRUCTIONS FOR YOUR

Model 2010 GTL WX

Summary of Contents for 2010 GTL WX

Page 1: ...40 CHANNEL SOLID STATE CITIZENS BAND SSB AM TWO WAY RADIO BASE STATION With Seven Weather Channels and NOAA Emergency Alert Tone OPERATING INSTRUCTIONS FOR YOUR Model 2010 GTL WX ...

Page 2: ...ating Procedure to Transmit 10 Operating Procedure to Receive Weather Band 10 11 Frequency Counter LCD Digital Clock 11 Receiving SSB Signals 13 13 Section V Maintenance and Adjustment 14 FCC Warning 14 Section VI Appendix 15 16 17 Ten Code 15 A Few Rules That Should Be Obeyed 16 How Your CB Can Serve You 16 Use Channel 9 for Emergency Messages Only 17 Alternate Microphones and Installation 18 19 ...

Page 3: ...DIO NWR is a service of the National Oceanic and Atmo spheric Administration NOAA of the U S Department of Commerce It provides continuous around the clock broadcasts of the latest weather information directly from National Weather Service Offices The broadcasts are tailored to the weather information needs of people within the receiving area For example coastal and Great Lakes stations provide sp...

Page 4: ...hich includes noise blanker circuitry and a switchable automatic noise limiter The receiver also features increased protection against cross modulation and strong adjacent channel signals To obtain maximum performance please read carefully the descriptions and operating instructions in this manual Fill out below keep for your records 21 27 215 22 27 225 23 27 255 24 27 235 25 27 245 26 27 265 27 2...

Page 5: ... Weight 19 1 2 lbs Including speaker Antenna Conductor UHF S0239 Semiconductors 12 integrated circuits 3 FETs 58 transistors 79 diodes 1 LCD Meter 1 Illuminated indicates relative power output received signal strength Meter 2 Illuminated indicates standing wave ratio and level of modulation TRANSMITTER Power Output AM 4 watts SSB 12 watts PEP Modulation High and low level Class B Amplitude Modulat...

Page 6: ...0 000 microvolts Squelch Adjustable threshold less than 0 25 µV ANL Switchable Noise Blanker RF type effective on AM and SSB Voice Lock Range 1 5 KHz Audio Output Power 4 watts into 8 ohms Frequency Response 300 to 2500 Hz Built in Speaker 8 ohms round External Speaker Not Supplied 8 ohms disables internal speaker when connected CLOCK COUNTER Clock 24 hr time Counter Displays transmit and receive ...

Page 7: ...where both stations are fixed a directional beam will usually increase communicating range since this type of antenna concentrates transmitted energy in one direction The beam antenna also allows the receiver to listen in only one direction thus reducing interfering signals Antenna height is an important factor when maximum range is desired Keep the antenna clear of surrounding structures or folia...

Page 8: ...counterclockwise then slowly clockwise until the receiver noise disappears Any signal to be received must now be slightly stronger than the average received noise Further clockwise rotation will increase the threshold level which a signal must overcome in order to be heard Only strong signals will be heard at a maximum clockwise setting 5 RF GAIN CONTROL Adjust as required to optimize the signal T...

Page 9: ...d in the Weather Mode 8 MODE SWITCH USB LSB AM This switch selects AM Amplitutde Modula tion USB Upper Side Band or LSB Lower Side Band mode of operation The Mode selector switch changes the mode of operation of both the transmitter and receiver simultaneously This feature cannot be used in the Weather Mode 9 CHANNEL SELECTOR In the CB Mode this electronic selector selects any one of the forty Cit...

Page 10: ...ng The external speaker should have 8 ohm impedance and be rated to handle at least 4 0 watts When the external speaker is plugged in the internal speaker is automatically disconnected WX ALERT TONE If threatening weather is nearby the National Weather Service may broadcast a 10 second alert tone This tone will be heard through the CB even if the CB WX Switch is in the CB mode or the unit is turne...

Page 11: ...ial cable and all RF electrical connections If there is any degradation whatsoever in any of the above due to humdidity salt spray vibration or corrosion theSWRmeterreadingwillrise therbyindicatingthataproblemexists To calibrate switch to the CAL position Transmit by pressing the mic switch AM mode and adjust the SWR CAL control to the CAL mark on the meter Then switch to SWR position for the SWR ...

Page 12: ...ction IV Operation Continued OPERATING PROCEDURE TO TRANSMIT 1 Select the desired channel of transmission 2 Set the DYNAMIKE control fully clockwise 3 If the channel is clear press the push to talk switch on the microphone and speak in a normal voice The S RF meter will indicate relative power output and the modulation meter will indicate percentage of modulation as you speak into the microphone C...

Page 13: ...D is the Counter Clock Indicator 2 For proper procedure to set your LCD Clock there are the following features TIME SET 2 switches used to set time COUNTER CLOCK 1 switch used to select display TO SET TIME 1 Press FREQ CTR CLOCK Switch to select the clock 2 HOUR SWITCH Press this switch to get correct hour setting 3 MINUTE SWITCH Press this switch to get correct minutes setting NOTE the 2010 GTL W...

Page 14: ...d with 100 of the SSB signal An SSB signal may be received only when the listening receiver is functioning in the same mode In other words an upper sideband signal USB may be made intelligible only if the receiver is functioning in the USB position If a lower sideband LSB signal is heard when the receiver is in the USB mode no amount of tuning will make the signal intelligible The reason for this ...

Page 15: ...oices will be high pitched and if set too low voices will be low pitched Also there is only onecorrect speed that will make a particular record produce the same sound that was recorded If the record is played on a turntable that rotates in the wrong direction opposite sideband no amount of speed control VOICE LOCK will produce an intelligible sound An AM signal received while listening in one of t...

Page 16: ...fer to the schematic diagram and parts list NOTE If the performance described in the OPERATION and MAINTENANCE AND ADJUSTMENT sections is not obtained review the operating instru ctions to insure that proper procedures were followed If a problem still exists refer to WARRANTY SERVICE INSTRUCTIONS elsewhere in this manual FCC WARNING All transmitter adjustments other than those provided on front pa...

Page 17: ...answers Its use permits faster communications and better understanding in noisy areas The following table lists some of the more common codes and their meanings 10 CODE Code Meaning Code Meaning 10 1 Receiving poorly 10 2 Receiving well 10 3 Stop transmitting 10 4 OK message received 10 5 Relay message 10 6 Busy stand by 10 7 Out of service leaving air 10 8 In service subject to call 10 9 Repeat m...

Page 18: ...ast in event of emergency or breakdown Suggest good spots to eat and sleep Make long trips more interesting and help keep you awake Provide direct contact with your office or home Make friends for you as you travel Provide local information to find you destination Help law enforcement officers by reporting drunk and reckless drivers ColonelSamuelS SmithoftheMissouriHighwayPatrolcalledthenumberofdr...

Page 19: ... sighted Yes I am out of gas on Interstate 95 No I am out of gas in my driveway Yes There is a four car collision at Exit 10 on the Beltway send police and ambulance No Traffic is moving smoothly on the Beltway Yes Base to Unit 1 the Weather Bureau has just issued a thunder storm warning Bring the sailboat into port No Attention all motorists The Weather Bureau advises that the snow tomorrow will ...

Page 20: ...in Number Mic Cable Lead 1 Audio Lead 2 Audio Shield 3 Receive Control 4 Grounding 5 Transmit Control Fig 1 Cobra 2010 GTL WX microphone schematic If the microphone to be used is provided with pre cut leads they must be revised as follows 1 Cut leads so that they extend 7 16 beyond the plastic insulating jacket of the microphone cable see Fig 2 2 All leads should be cut to the same length Strip th...

Page 21: ...to the pins of the microphone are complete push the knurled ring and the housing forward and screw the housing onto the threaded portion of the pin receptacle body Note the location of the screw clearance hole in the plug housing with respect to the threaded hole in the pin receptacle body When the housing is completely threaded into the pin receptacle body a final fraction of a turn either clockw...

Page 22: ...mustnowbesolderedtothepinsasindicatedintheabovewiringtables If a vise or clamping tool is available it should be used to hold the pin receptacle body during the soldering operation so that both hands are free to perform the soldering If a vise or clamping tool is not available the pin receptacle body can be held in a stationary position by inserting it into the microphone jack on the front panel T...

Page 23: ...ice RPS or First Class Insured Mail to Cobra Factory Service Cobra Electronics Corporation 6500 W Cortland St Chicago IL 60707 Cobra is not responsible for units not received if package has not been properly insured 6 Iftheunitisinwarranty uponreceiptofyourunititwilleitherberepairedorexchanged depending on the model Please allow approximately 3 to 4 weeks before contacting us for status If the uni...

Page 24: ...g service see the If You Need Service section of the Owner s Manual Exclusions This limited warranty does not apply 1 to any product damaged by accident 2 in the event of misuse or abuse of the product or as a result of unauthorized alterations or repairs 3 if the serial number has been altered defaced or removed 4 if the owner of the product resides outside the U S A All implied warranties includ...

Page 25: ...netic mount with 15 RG58U Cable and PL 259 connector ATW 400 39 95 ATW 480 DUAL BAND ANTENNA Truck mirror mount with 1 2 meter 3 8 fiberglass whip weather tunable ATW 480 29 95 ATW 500 DUAL BAND ANTENNA 48 whip magnet mount with 16 8240 cable PL 259 connector ATW 500 49 95 ATW 2000 DUAL BAND ANTENNA Truck mirror mount 48 stainless steel whip weather tunable ATW 2000 69 95 ATW 1000 DUAL BAND ANTENN...

Page 26: ...PRINTED IN MALAYSIA COBRA ELECTRONICS CORP 1996 480 114 P 001 FOLD HERE TO MAKE SELF MAILER PLACE STAMP HERE Cobra Cobra Electronics Corporation 6500 W Cortland Street Chicago IL 60707 ...

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