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Figure 7-19.--Block diagram of a power amplifier.
 

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Figure 7-19.--Block diagram of a power amplifier.
Figure 7-20 is an illustration of an IC/MSB-2
detachable microphone with a press-to-talk switch,
microphone  control  station.  Microphone  control
loudspeaker group control switches, busy indicator
stations are self-contained, bulkhead-mounted units
lights, and a volume indicator meter.
with a hinged cover guard. The stations consist of a
MICROPHONE.-- A magnetic type of micro-
phone is used with the IC/MSB-2 microphone control
station. This microphone is equipped with an 18-inch
cable and a plug. The microphone plugs into a
receptacle mounted in the bottom of the station. A
tapered holder, mounted on the front panel of the
station, holds the microphone. When using the
microphone to transmit, you may remove it from its
holder or leave it in the holder. To use the
microphone, you must depress the press-to-talk
switch located on the microphone to transmit. When
talking into the microphone, you should hold the
microphone one-half inch from your mouth and speak
directly into it in a normal tone of voice.
LOUDSPEAKER GROUP CONTROL
SWITCHES.-- There are five circuit 1MC
loudspeaker group control switches and one
circuit  6MC  loudspeaker  group  control
switch mounted on the front of microphone
control station 1. Stations 2 through 6 will
contain  circuit  1MC  loudspeaker  group
control switches only. These switches are
used to select which loudspeaker group(s)
Figure 7-20.--IC/MSB-2 microphone control
is/are to receive the announcement being
station.
transmitted  from  the  microphone  control
7-17

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