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- 10 -

REAR PANEL CONNECTOR 

 

  

 
 

1.

 

ANTENNA :

 This antenna jack accepts 50 ohms coaxial cable with a PL-259 

type plug. 

 
2.

 

POWER :

 This accepts 13.8V DC power cable with built-in fuse. The power 

cord provided with the radio has a black and red wire. The black goes to 
negative and red goes to positive.  

 

3.

 

PA. SP. :

 This jack is for PA operation. Before operating, you must first 

connect a PA speaker (8 ohms, 4W) to this jack. 

 
4.

 

EXT. SP :

 This jack accepts 4 to 8 ohms, 5 watts external speaker. When the 

external speaker is connected to this jack, the built-in speaker will be disabled. 

 

 
 

 

 
 

 

- 11 -

FREQUENCY CHART 

 

Channel   Channel Frequency Channel   Channel Frequency 

  26.965 MHz 

21 

  27.215 MHz 

  26.975 MHz 

22 

  27.225 MHz 

  26.985 MHz 

23 

  27.255 MHz 

  27.005 MHz 

24 

  27.235 MHz 

  27.015 MHz 

25 

  27.245 MHz 

  27.025 MHz 

26 

  27.265 MHz 

  27.035 MHz 

27 

  27.275 MHz 

  27.055 MHz 

28 

  27.285 MHz 

  27.065 MHz 

29 

  27.295 MHz 

10 

  27.075 MHz 

30 

  27.305 MHz 

11 

  27.085 MHz 

31 

  27.315 MHz 

12 

  27.105 MHz 

32 

  27.325 MHz 

13 

  27.115 MHz 

33 

  27.335 MHz 

14 

  27.125 MHz 

34 

  27.345 MHz 

15 

  27.135 MHz 

35 

  27.355 MHz 

16 

  27.155 MHz 

36 

  27.365 MHz 

17 

  27.165 MHz 

37 

  27.375 MHz 

18 

  27.175 MHz 

38 

  27.385 MHz 

19 

  27.185 MHz 

39 

  27.395 MHz 

20 

  27.205 MHz 

40 

  27.405 MHz 

 

 

 
 

 

Summary of Contents for DX-939

Page 1: ...rference 4 Antenna 4 Tuning The Antenna For Optimum SWR 5 External Speaker 6 Public Address 6 CHAPTER 3 Operation Control Functions 7 Front Panel 7 Rear Panel 10 Frequency Chart 11 Procedure to Receive and Transmit 12 Receiving SSB Signals 13 Alternate Microphone and Installation 15 Maintenance And Adjustment 18 A Few Rules That Should Be Obeyed 19 How Your CB Can Serve You 19 Use Channel 9 For Em...

Page 2: ...y strong Also provide a good electrical grounding connection to the chassis of the vehicle Proceed as follows to mount the transceiver 1 After you have determined the most convenient location in your vehicle hold the transceiver with mounting bracket in the exact location desired If nothing will interfere with mounting it in the desired position remove the mounting bolts Before drilling the holes ...

Page 3: ... a boat the transceiver will not operate at maximum efficiency without a ground plate unless the vessel has a steel hull Before installing the transceiver in a boat consult your dealer for information regarding an adequate grounding system and prevention of electrolysis between fittings in the hull and water 5 TUNING THE ANTENNA FOR OPTIMUM S W R Since there is such a wide variety of base and mobi...

Page 4: ...from the microphone to prevent acoustic feedback Physical separation or isolation of the microphone and speaker is important when operating the PA at high output levels 7 CHAPTER 3 OPERATION CONTROL FUNCTIONS FRONT PANEL 1 ON OFF VOLUME CONTROL Turn clockwise to apply power to the radio and to set the desired listening level 2 SQUELCH CONTROL This control is used to control or eliminate receiver b...

Page 5: ...matic Noise Limiter is activated In the NB ANL position the Noise Blanker is also activated The Noise Blanker is very effective in eliminating repetitive impulse noise such as ignition interference 13 PA CB RB SWITCH In the PA position your voice will come out of the speaker that you need to plug in to the PA SP jack on the back of the radio The radio does not operate when you are in the PA mode T...

Page 6: ...r is connected to this jack the built in speaker will be disabled 11 FREQUENCY CHART Channel Channel Frequency Channel Channel Frequency 1 26 965 MHz 21 27 215 MHz 2 26 975 MHz 22 27 225 MHz 3 26 985 MHz 23 27 255 MHz 4 27 005 MHz 24 27 235 MHz 5 27 015 MHz 25 27 245 MHz 6 27 025 MHz 26 27 265 MHz 7 27 035 MHz 27 27 275 MHz 8 27 055 MHz 28 27 285 MHz 9 27 065 MHz 29 27 295 MHz 10 27 075 MHz 30 27 ...

Page 7: ...r maximum receive gain C RF POWER CONTROL This feature allows for the adjustment of the RF power output continuously over the range of 1 to 4 watts in AM D PROCEDURE TO TRANSMIT 1 Select the desired channel of transmission 2 Set the MIC GAIN control fully clockwise 3 If the channel is clear depress the push to talk switch on the microphone and speak in a normal voice 13 ALTERNATE MICROPHONES AND I...

Page 8: ...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 receptacle body before soldering 7 If the microphone jack is used to hold the pin receptacle during soldering operation best results are obtained when the connections to pin 1 and 3 are made first and then the connections to pins 2 and 4 Use a minim...

Page 9: ... 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 amplified transmitter power or illegally high antennas 3 You can t use the transceiver to promote illegal activities 4 You are not allowed to use profanity 5 You ...

Page 10: ...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 accumulate 4 to 6 ...

Page 11: ... RAN may be obtained from our website or by calling our Service Department at 760 480 8800 between 10 00 AM and 4 00 PM Pacific Time The RAN must be written below your return address on the outside of the shipping box Boxes which arrive without an RAN will be refused and the shipping company will return the unopened box to you Be sure to have a pen and paper ready along with the serial number of y...

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