Cobra Electronics 2010 GTL WX manual

40 CHANNEL SOLID ST A TE CITIZENS B AND SSB/AM TW O-W A Y RADIO B ASE ST A TION W ith Sev en W eather Channels and NO AA Emergenc y Alert T one OPERA TING INSTRUCTIONS FOR Y OUR Model 2010 GTL WX[...]

How T o Use Y our SOLID ST A TE CITIZENS B AND SSB/AM 2-W A Y RADIO B ASE ST A TION Model 2010 GTL WX Contents Page The CB Story .................................................................................... 1 Section I: Introduction ..................................................................... 2 Section II: Specifications ...........[...]

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 “transmissions” (one party to another) rather t[...]

Section I Introduction FREQUENCY RANGE The COBRA 2010 GTL WX transceiver represents one of the most advanced AM base station radios used 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. CB Channel Freq. CB Channel Freq. Chan[...]

Section II Specifications GENERAL Channels 40. Frequency Range 26.965 to 27.405 MHz. Frequency Control Phase Lock Loop (PLL) synthesizer. Frequency Tolerance ± 130 Hz Typical. Operating Temperature Range -30 ° C to + 50 ° C. Microphone Plug-in type; 600 Ω dynamic. Power Source 120V AC nominal. 13.8V DC nominal. (Positive or negative ground). P[...]

Section II Specifications (Cont.) RECEIVER Sensitivity SSB: 0.25 µ V for 10dB (S+N)/N at greater than 1/2-watt of audio output. AM: 0.5 µ V for 10 dB (S+N)/ at greater than 1/2-watt of audio output. Selectivity AM: 6dB @ 3 KHz, 50 dB @ 9 KHz. SSB: 6 dB @ 1.1 KHz, 60 dB @ 2.3 KHz. Image Rejection More than 65 dB. IF Frequency AM: 7.8 MHz 1st IF, 4[...]

5 Section III Installation LOCATION Prior to beginning operation of the transceiver, a basic installation must be prepared. Installation of the transceiver itself is a rather simple procedure. In selecting the location for the unit, two basic factors must be considered: 1. Access to a 120V, 60 Hz power source. 2. The location must be convenient for[...]

Section IV Operation CONTROLS AND INDICATORS There are eighteen controls, 2 meters, 1 LCD and 1 jack on the front panel of your 2010 GTL WX. A. CONTROL FUNCTIONS 1. POWER SWITCH. Press in to turn on radio. Press in, again, and release to turn off radio. 2. DYNAMIKE. Adjusts the microphone gain in the transmit mode. This controls the gain to the ext[...]

7 Section IV Operation (Continued) 6. SWR CAL CONTROL . In order for you to achieve maximum radiated power and the longest range, it is important that your antenna be in good condition, properly adjusted and matched to your transceiver. The Built-in SWR (standing wave ratio) meter lets you easily measure your antenna condition. To operate this func[...]

8 Section IV Operation (Continued) 15. PRESS-TO-TALK MICROPHONE . 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. When transmitting, hold the microphone two inches from the mouth and speak clearly in a normal "voice." T[...]

9 SWR CAL SWR MOD CAL LSB AM USB MIN FREQ. CTR CLOCK AM / SSB BASE STATION WITH WEATHER ALERT AM / SSB BASE STATION WITH WEATHER ALERT HOUR VOICELOCK MAX MIN RF GAIN DYNAMIKE POWER PHONE VOLUME MIC SQUELCH COARSE NB SWR CAL 100% 0 1.5 2 3 MOD SIGNAL +30 R X TX ANT USB LSB AM 0 1 9 8 10 7 6 5 4 3 11 12 13 14 15 16 17 18 19 20 3 2 5 9 3 4 RF PWR ANL [...]

10 OPERATING PROCEDURE TO RECEIVE 1. Place the WX/CB Switch in the CB position. 2. Turn the set ON by pressing the POWER Switch. 3. Adjust the VOLUME for a comfortable listening level. 4. Set the Channel selector switch to the desired channel. 5. Set RF GAIN fully clockwise. 6. Set the Mode Selector to desired mode for LSB, AM or USB. 7. Adjust the[...]

OPERATING PROCEDURE TO RECEIVE WEATHER BAND continued 3. 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 WX/CB Switch is in the CB mode or the unit is turned off (see NOTE below). This enables you to monitor CB frequencies and still be warned by[...]

12 RECEIVING SSB SIGNALS There are three types of signals presently used for communications in the Citizens Band: AM, USB, and LSB. When the MODE switch on your unit is placed in the AM position, only standard double-sideband, full carrier signals will be detected. An SSB signal may be recognized while in the AM mode by its characteristic “Donald[...]

RECEIVING SSB SIGNALS continued Once the desired SSB mode has been selected, frequency adjustment may be necessary in order to make the incoming signal intelligible, the VOICE LOCK control allows the operator to vary frequency above and below the exact-center frequency of the received signal. If the sound of the incoming signal is high or low pitch[...]

14 Section V Maintenance and Adjustment The COBRA 2010 GTL WX transceiver is specifically designed for the environment encountered in base station installations. The use of all solid state circuitry and its light weight result in high reliability. Should a failure occur, however, replace parts only with identical parts. Do not substitute. Refer to [...]

15 10-37 Wrecker needed at 10-38 Ambulance needed at 10-39 Your message delivered 10-41 Please turn to channel 10-42 Traffic accident at 10-43 Traffic Tie up at 10-44 I have a message for you 10-45 All units within range please report 10-50 Break channel 10-60 What is the next message number? 10-62 Unable to copy, use phone 10-63 Net directed to 10[...]

16 Section VI Appendix (Continued) A FEW RULES THAT SHOULD BE OBEYED 1. 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. 2. You are not allowed to blast others off the air by over-powering them with illegally amplif[...]

Section VI Appendix (Continued) 17 USE CHANNEL 9 FOR EMERGENCY MESSAGES ONLY FCC gives the following examples of permitted and prohibited types of communica- tions for use on Channel 9. These are guidelines and are not intended to be all- inclusive. Permitted Example Message Yes ”A tornado sighted six miles north of town.” No ”This is observa[...]

Section IV Operation (Continued) ALTERNATE MICROPHONES AND INSTALLATION For best results, the user should select a low-impedance dynamic type microphone or a transistorized microphone. Transistorized type microphones have a low output impedance characteristic. The microphones must be provided with a five-lead cable. The audio conductor and its shie[...]

Section VI Appendix (Continued) Fig. 4 . Microphone plug pin numbers viewed from rear of pin receptacle. Be sure that the housing and the knurled ring of Fig. 3 are pushed back onto the microphone cable before starting to solder. If the washer is not captive to the pin receptacle body, make sure that it is placed on the threaded portion of the pin [...]

20 Section VI Appendix (Continued) Fig. 2. Microphone Cable Preparation To wire the microphone cable to the plug provided, proceed as follows. Fig. 3 . Microphone plug wiring. 1. Remove the retaining screw. 2. Unscrew the housing from the pin receptacle body. 3. Loosen the two cable clamp retainer screws. 4. Feed the microphone cable through the ho[...]

21 If Y ou Need Ser vice If You Think You Need Service, Call 773-889-3087 You may be asked to send your unit to the Cobra factory. It will be necessary to furnish the following, in order to have the product serviced and returned. 1. For Warranty Repair, include some form of proof-of-purchase, such as a mechanical reproduction or carbon or a sales r[...]

W ARRANTY 22 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[...]

Amount (Tax if applicable ★★ ) Shipping / handling $3.50 Total ★★ Description Part No. Cost Ea. X Qty. = Amount COBRA CB RADIO ACCESSORIES CUT ALONG DOTTED LINE FOLD THIS FLAP OVER BOTTOM AND TAPE IT DOWN AND SIDES TO CLOSE FOLD ALONG THIS LINE FIRST FOLD ALONG THIS LINE SECOND Allow 4 to 6 weeks delivery. Offer valid in Continental U.S. on[...]

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[...]