6
To wire the microphone cable to the plug provided, proceed as follows:
Remove the retaining screw.
1.
Unscrew the housing from the pin receptacle body.
2.
Loosen the two cable clamp retainer screws.
3.
Feed the microphone cable through the housing, knurled ring and
4.
washer as shown Figure 2.
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.
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 low output impedance characteristics. The
microphones must be provided with a four-lead cable. The audio
conductor and its shielded lead comprise two of the leads. The third
lead is for transmit control and fourth is for receiving control.
The microphone should provide the functions shown in the
schematic below.
4 WIRE MIC CABLE
Pin Number
1
2
3
4
Mic Cable Lead
Audio Shield
Audio Lead
Transmit Control
Receive Control
If the microphone to be used is provided with pre-cut leads, they must
be revised as follows.
Cut leads so that they extend 7/16" beyond the plastic insulating jacket
1.
of the microphone cable.
All leads should be cut to the same length. Strip the ends of each wire
2.
1/8" and tin the exposed wire.
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