Yaesu FT-840 Service Manual page 147

Specifications
Type:
Dynamic
Frequency Response:
100Hz � l 5kHz ( - 6dB )
Sensitivity:
- 75dB ± 3dB at l kHz ( OdB= lV/ 0 . l Pa )
Directivity
Pattern:
Unidirectional ( teardrop )
Switches :
Top:
Bottom:
Dimensions:
Base:
Microphone:
Weight:
Base � 630g
Microphone � 250g
+10
dB
0
dB
-10
dB
-20
dB
-30
dB
-40
dB
20 50
Circuit Diagram
ON
BLACK
+- =
0
BLACK
ORANGE
RED
BROWN
BLUE
YELLOW
FT-840 Technical Supplement
( Impedance: 600 Q ± 30% at lkHz )
PTT, PTT lock, Scan UP, DOWN and FAST
Audio Tone Response ( 3 positions )
Position 1 : full range
Position 2 : - 5dB at lOOHz
Position 3: - lOdB at lOOHz
98
x x
160 165mm ( WHD )
X
diameter 40 .5 210mm
200 500
100
FREOUENCY(Hz)
PTT
LOCK
FST i
UP i
DWNi
1000 2000
WHITE
RED
YELLOW ORANGE
BLUE
M D-1ca M icrophons
20000
5000
10000