MH-53
A7A
Service Manual
1
Vertex Standard LMR, Inc.
©2013 Vertex Standard LMR, Inc.
EAB02X90A
Noise-Canceling Microphone
MH-53
A7A
Service Manual
Specifications
Microphone Type:
Dynamic
Microphone Impedance:
700-ohm ± 30 % at 1 kHz
Microphone Sensitivity:
–
49.5 ± 4 dB at 1 kHz (0 dB = 1 V / microbar)
Operating Temperature:
14 °F to 122 °F (
–
10 °C to 50 °C)
Weight
(Approx.)
:
11.5 oz (325 g)
Non-designated parts are available only as
part of a designated assembly.
The
MH-53
A7A
is a Noise-Canceling Microphone designed especially for Vertex Standard
Transceivers.
S8101141
CURL CORD ASSY
(w/ SCREW)
S8101137
MIC ELEMENT
S8101139
PTT SWITCH ASSY
S8101138
PCB ASSY
U9900100
SCREW
S8101140
MIC ELEMENT
(Rear Side)
Connector Pinout Diagram
Pin 8 (13.8V)
Pin 6 (PTT)
Pin 5 (Hook)
Pin 4 (MIC)
Pin 3 (Ground)
