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- 14 -

Before beginning the actual wiring, read carefully the circuit and wiring 

information provided with the microphone you select. Use the minimum heat 
required in soldering the connections. Keep the exposed wire lengths to a minimum 
to avoid shorting when the microphone plug is reassembled. 
 

 

 

Fig. 2

 Microphone plug wiring 

 

To wire the microphone cable to the plug provided, proceed as follows : 
 
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 housing, knurled ring and washer as 
shown Figure 2. 

 
5.

 

The wires must now be soldered to the pins as indicated in the above wiring 
tables. 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 

 

- 15 -

microphone jack on the front panel. The numbers of the microphone plug are 
shown in Fig. 3, as viewed from the back of the plug. Before soldering the wire 
to the pins, pre-tin the wire receptacle of each pin of the plug. 

 
 
 
 
 
 
 
 
 
 
 

Fig. 3

 Microphone plug pin numbers viewed from rear of pin receptacle. 

 
6.

 

Be sure that the housing and the knurled ring of Figure 2 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 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 minimum amount of 
soldering and be careful to prevent excessive solder accumulation on pins, 
which could cause a short between the pin and the microphone plug housing. 

 
8.

 

When all soldering connections to the pins of the microphone are completed, 
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 clockwise or counterclockwise 
may be required to align the screw hole with the threaded hole in the pin 
receptacle body. When these are aligned, the retaining screw is then screwed 
into place to secure the housing to the pin receptacle body. 

 

9.

 

The two cable clamp retainer screws should now be tightened to secure the 
housing to the microphone cord. If the cutting directions have been carefully 
followed, the cable clamp should secure to the insulation jacket of the 
microphone cable. 

 
10.

 

Upon completion of the microphone plug wiring, connect and secure the 
microphone plug in the transceiver. 

Содержание DX-939

Страница 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...

Страница 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 ...

Страница 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...

Страница 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...

Страница 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...

Страница 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 ...

Страница 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...

Страница 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...

Страница 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 ...

Страница 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 ...

Страница 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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