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Noise-Canceling Microphone
MH-53
Service Manual
The MH-53
is a Noise-Canceling Microphone designed especially for Vertex Standard
A7A
Transceivers.
S8101139
PTT SWITCH ASSY
S8101137
MIC ELEMENT
Connector Pinout Diagram
Specifications
Microphone Type: Dynamic
Microphone Impedance: 700-ohm ± 30 % at 1 kHz
Microphone Sensitivity:
Operating Temperature: 14 °F to 122 °F (
Weight (Approx.): 11.5 oz (325 g)
MH-53
Service Manual
A7A
A7A
S8101140
MIC ELEMENT
(Rear Side)
S8101138
PCB ASSY
S8101141
CURL CORD ASSY
(w/ SCREW)
Pin 8 (13.8V)
Pin 6 (PTT)
Pin 5 (Hook)
Pin 4 (MIC)
Pin 3 (Ground)
49.5 ± 4 dB at 1 kHz (0 dB = 1 V / microbar)
–
Vertex Standard LMR, Inc.
©2013 Vertex Standard LMR, Inc.
Non-designated parts are available only as
part of a designated assembly.
10 °C to 50 °C)
–
EAB02X90A
U9900100
SCREW
1
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Related Manuals for Vertex Standard MH-53A7A
Summary of Contents for Vertex Standard MH-53A7A
- Page 1 Vertex Standard LMR, Inc. Noise-Canceling Microphone MH-53 ©2013 Vertex Standard LMR, Inc. EAB02X90A Service Manual The MH-53 is a Noise-Canceling Microphone designed especially for Vertex Standard Transceivers. S8101139 S8101140 PTT SWITCH ASSY MIC ELEMENT (Rear Side) Non-designated parts are available only as part of a designated assembly.
- Page 2 Circuit Diagram MH-53 Service Manual...
- Page 3 Parts Layout Noise Canceling Unit Side A Side B PTT Unit S1001 MH-53 Service Manual...
- Page 4 Parts List REF. DESCRIPTION VALUE TOL. MFR’S DESIG VXSTD P/N LOT. SIDE LAY ADR *** NOISE CANCELING UNIT *** PCB with Components S8101138 C 1001 CHIP. TA. CAP. 4.7uF TESVB21A475M8R K78100010 C 1002 CHIP. TA. CAP. 4.7uF TESVB21A475M8R K78100010 C 1003 CHIP. TA. CAP. 10uF TEMSVA1A106M-8R K78100028...
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