background image

 

 

Fig. 5

 Microphone plug pin numbers viewed from rear of pin 

receptacle. 

 

Be sure that the housing and the knurled ring of Fig. 4 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. 

 

If the microphone jack is used to hold the pin receptacle during the 
soldering operation, best results are obtained when the connections to 
pins 1 and 3 are made first and then the connections to pins 2 and 4. 
Use a minimum amount of solder and be careful to prevent excessive 
solder accumulation on pins, which could cause a short between the pin 
and the microphone plug housing. 

 

6.  When all soldering connections to the pins of the microphone plug 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 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 the place to secure 
the housing to the pin receptacle body. 

 

7.  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 insulating jacket 
of the microphone cable. 

 

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

microphone plug in the transceiver. 

 
 
 
 
 

MEMO 

 

 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 

 

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Summary of Contents for DX-77HML

Page 1: ...Printed In Malaysia AT3602014G PD000907 DX 77HML Full Channels with 10KHz AM FM USB LSB PA Mobile Transceiver with Roger Beep OWNER S MANUAL...

Page 2: ...ltage 13 8V DC nominal 15 9V max 11 7V min positive or negative ground Transmit AM full mod 4A SSB 21 watts PEP output 6A Receiver Squelched 0 6A Maximum audio output 1 2A Size 2 3 8 H x 7 7 8 W x 9 1...

Page 3: ...and radio to your car make sure it is mechanically strong Also provide a good electrical connection to the chassis of the vehicle Proceed as follows to mount the transceiver 1 After you have determine...

Page 4: ...rate ground wire from the unit to a good metal electrical ground in the vehicle When installed in a boat the transceiver will not operate at maximum efficiency without a ground plate unless the vessel...

Page 5: ...readout directly above the Channel Selector knob 11 METER This meter indicates received signal strength transmitter RF output power 12 RF POWER HI MED LO This switch is used to select transmitting pow...

Page 6: ...ctions on other microphones see next section ALTERNATE MICROPHONES AND INSTALLATION OPERATINGPROCEDURE TO RECEIVE 1 Be sure that power source microphone and antenna are connected to the proper connect...

Page 7: ...ion either USB or LSB a true reproduction of single tone of modulation will result and if the tone is increased in frequency such as a low pitched whistle a high pitched whistle you will hear the incr...

Page 8: ...efore beginning the actual wiring read carefully the circuit and wiring information provided with the microphone you select Use the minimum head required in soldering the connections Keep the exposed...

Page 9: ...ophone plug 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 p...

Page 10: ...MEMO MEMO 18 17...

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