Desktop Microphone Circuit Description; Desktop Microphone To Radio Interface - Tait TM9100 Service Manual

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Figure 19.2 Desktop microphone to radio interface

Circuit Description

The desktop microphone uses a dynamic microphone capsule and contains

a pre-amplifier (Q1) to boost the microphone level to that required by the

radio. Power for the pre-amplifier is provided by the electret microphone

bias circuit within the radio. R5 is used to adjust the gain.

PTT and hookswitch signals are combined onto one line and fed to the

control head PTT input of the radio.

TM9100 Service Manual

TMAA10-01 Desktop Microphone