Ranger TR-127GK/DX Alternate Microphones and Installation, Your Transceiver Microphone Schematic

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2.4 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 a low output impedance characteristic. 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 the fourth is for receiving control.

The microphone should provide the functions shown in the schematic below (Figure 2-3).

4 WIRE MIC CABLE

Pin Number

Mic Cable Lead

1Audio Shield

2Audio Lead

3Transmit Control

4Receive Control

Figure 2-3 Your Transceiver Microphone Schematic

Figure 2-4 Microphone plug and pin numbers viewed from rear of pin receptacle.

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Contents TR-127GK/DX TR-127GK/DX Table of Contents General TR-127GK/DX Chapter SpecificationsTR-127GK/DX Operation IntroductionControls and Connections Front Panel Page Represents the location of the following connections Rear PanelMHz Frequency Chart Channel Channel FrequencyOperation Procedure to Receive Procedure to TransmitMicrophone Your Transceiver Microphone Schematic Alternate Microphones and InstallationPLL Circuit TR-127GK/DX Chapter Circuit DescriptionReceiver Circuit Transmitter Modulation CircuitTR-127GK/DX Block Diagram PLL Alignment T. Setting Adjust Point Measurement Alignment ProceduresTR-127GK/DX Chapter Alignment Required Test EquipmentReceiver Alignment T. Setting Adjust Measurement Point Transmitter Alignment T. Setting Adjust Measurement PointTransmitter test setup TR-127GK/DX Main PCB Adjustment Location Precautions TR-127GK/DX Chapter MaintenanceFuse Replacement Periodic InspectionGeneral TR-127GK/DX Chapter Diagrams Parts ListTR-127GK/DX Rotary Switch PCB EPT092920Z Reference Ranger Part Description Number Part ListTR-127GK/DX Display PCB EPT092930Z Reference Ranger Part Description TR-127GK/DX Main PCB EPT012910A Copper Side Part List TR−127GK/DX Main PCB L23 TR-127GK/DX Schematic Diagram TR-127GK Mechanical Part TR-127DX Mechanical Part AT0127040A  Copyright 2004, Ranger Communications, Inc