Galaxy DX-939 Owner's Manual - Page 8
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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
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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.
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