VHF Enhanced Extra Wideband Receiver Instruction Manual IM10-VR3H040-AB
6-4
T
AB-S-03-01-1
HIGH PASS
NOISE FILTER
SUBTONE FILTER FC =300 Hz
7 POLE VOICE BAND HIGH PASS FILTER (Fc = 300 Hz)
DISCRIMINATOR O/P
(BUFFERED)
B-14
LPF
RFC 12
DC/AC
COUPLING
C54
1.0µF
1
2
3
4
5
6
7
8
U9
LM386
1
13
3
5
11
12
8
6
7
9
10
4
2
14
U7
4066
De-Emphasis
Audio Level
Adjust
R58
50k
High Level
Drive Adjust
R64
50k
+
C96
4.7µF
C97
100nF
COR (OPTO-ISOLATED)
B-18
LPF
RFC 15
COR (OPTO-ISOLATED)
Z-18
LPF
RFC 14
D6
BYD17
COR (NORMAL)
Z-12
LPF
RFC 11
COR (NORMAL)
B-12
NO 1
D-2
LPF
RFC 3
NC 1
D-6
LPF
RFC 6
COM 1
D-4
LPF
RFC 5
COM 2
D-10
LPF
RFC 9
NC 2
D-8
LPF
RFC 7
NO 2
D-12
LPF
RFC 10
LPF
RFC 26
MUTE
B-28
G
D
S
Q5
D15N06V
4
2
3
1
7
9
8
OPTIONAL RELAY
RLY1
G
D
S
Q7
D15N06V
COR PULLUP
R76
10k0
+6V
+9.5V
+
C84
4.7µF
C85
100nF
2
3
4
1
8
U19A
MC33172
Approx -5.7 V SQUELCHED
Approx 8.5 V UN SQUELCHED
(ACTIVE RECEIVER)
TP10
6
5
7
U5B
MC33172
2
3
4
1
8
U5A
MC33172
C67
22nF
C65
22nF
C66
22nF
R42
51k1
R40
22k6
R44
22k6
C64
100nF
C63
22nF
R38
37k4
C62
22nF
C61
22nF
R41
11k3
R37
15k4
+9.5V
+
C76
4.7µF
C77
100nF
R36
1k00
2
3
1
U6A
MC33172
6
5
4
7
8
U6B
MC33172
C73
100nF
R48
22k6
R52
22k6
C72
100nF
C71
22nF
R46
137k
C70
22nF
C69
22nF
R45
4k12
R49
51k1
R50
51k1
C75
68pF
+
C78
4.7µF
C79
100nF
R39
22k6
R43
22k6
C68
100nF
R47
22k6
R51
22k6
C74
100nF
6
5
4
7
8
U8B
MC33172
+
C94
100µF
C89
1.0µF
C90
100nF
C93
100nF
R30
1k00
R60
4k75
R61
100k
+
C92
4.7µF
+9.5V
+9.5V
+9.5V
R74
100k
+9.5V
+9.5V
Q6
BC817-25
+9.5V
R75
866R
R57
13k0
R65
13k0
+6.0V
+6.0V
SQUELCH DISABLE
(FRONT PANEL)
SW2
SQUELCH OVERRIDE
Z-14
+ C86
4.7µF
+
C87
4.7µF
- 6V
D5
BAS-16
C50
100nF
R28
22k6
R29
187k
C51
33pF
C49
1nF
R26
22k6
C48
1.0µF
R27
22k6
C82
100nF
R55
22k6
R56
187k
C83
33pF
C81
100nF
R53
39k2
C80
1.0µF
R54
39k2
+4.75V
+4.75V
+4.75V
+4.75V
2
3
4
1
8
U18A
MC33172
+
C52
4.7µF
C53
100nF
+9.5V
+
C104
100µF
C100
100nF
C88
100nF
Q3
BC807-25
R72
49k9
Q2
BC807-25
R73
49k9
D3
BAS-16
D2
BAS-16
6
5
7
U18B
MC33172
C132
120pF
3
4
2
5
6
1
7
8
U17
MOC223
LPF
RFC 29
6
5
7
U19B
MC33172
R98
100k
PRIORITY COR
(MT-2 AFC MON)
Z-24
JU5
LPF
RFC 21
+9.5V
BAS-16
D13
BC817-25
Q12
+6V
10k0
R107
SIG DETECT
PULLUP
470pF
C107
820pF
C108
150mH
L7
150mH
L8
10k0
R79
22k6
R81
6.8pF
C110
22k6
R80
100nF
C109
TP11
6
5
4
7
8
MC33172
U13A
+
4.7µF
C111
100nF
C112
+9.5V
680pF
C105
4k75
R78
+4.75V
10k0
R83
10k
R82
AD736
1
2
4
3
6
5
8
7
AD736J
U14
4.7nF
C113
+6V
330nF
C116
100nF
C119
330nF
C117
SEL
R88
Squelch
Threshold
Adjust
10k0
R89
330nF
C114
+9.5V
SEL
R87
LM285-2.5
U15
22k6
R86
+
4.7µF
C118
- 6V
681R
R84
TP13
+
4.7µF
C115
TP12
22k6
R85
2
3
4
1
8
MC33172
U16A
100nF
C124
100k
R92
BC817-25
Q9
100nF
C120
+9.5V
BC807-25
Q8
+9.5V
MMBZ5233B
D9
+9.5V
BAS-16
D8
BAS-16
D11
BC807-25
Q10
10k0
R90
+9.5V
10k0
R95
+9.5V
MMBZ5233B
D12
+
4.7µF
C121
100nF
C122
BAS-16
D10
49k9
R23
100R
R93
+
2.2uF
C140
BAS-16
D15
6
5
7
MC33172
U16B
10k0
R103
4k75
R99
- 6V
10k0
R102
10k0
R101
50k
R115
Squelch
Hysteresis
Adjust
BC807-25
Q11
+
4.7µF
C123
BAS-16
D4
10k0
R104
JU32
JU31
JU25
A
B
C
JU39
JU40
JU37
JU30
JU17
JU26
JU27
JU18
JU28
JU13
JU14
JU15
JU10
JU11
JU12
JU9
JU35
820pF
C106
4k75
R77
JU16
R59
22k6
JU44
JU43
C139
100nF
C91
33pF
2
3
4
1
8
U4A
MC33172
6
5
7
U4B
MC33172
LPF
RFC 8
R34
63k4
C60
10nF
R33
63k4
C59
10nF
+9.5V
+
C57
4.7µF
C58
100nF
R32
24k3
C56
68nF
C55
10nF
R31
24k3
R35
1k00
JU38
JU6
JU7
C95
1.0µF
+
C99
100µF
C103
33pF
R69
15k4
R67
4k75
C101
1.0µF
Flat Audio
Level Adjust
R66
50k
2
3
1
U8A
MC33172
C102
100nF
+4.75V
R68
22k6
100k
R105
JU29
D7
BYD17
DISC O/P LPF
B-10
SIDE 1
B-26
SIDE 2
Z-26
LPF
RFC 23
LPF
RFC 22
FLAT AUDIO O/P
B-22
LPF
RFC 20
DE-EMP AUDIO O/P
B-20
LPF
RFC 17
AUX SPKR 0/P
B-4
LPF
RFC 4
2
1
6
4
3
5
600 OHM BALANCED
O/P
T1
AUDIO
R62
475R
JU22
JU19
JU24
JU21
JU23
JU20
R70
475R
R63
475R
JU33
10k0
R96
JU8
FROM PAGE 1
RSSI
FROM PAGE 1
RECOVERED AUDIO
FROM PAGE 1
MUTE
FROM PAGE 1
PRIORITY COR
10k0
R91
SEL
R24
0R0
R71
RECOVERED AUDIO
RECOVERED AUDIO
RECOVERED AUDIO
RSSI
MUTE
MUTE
PRIORITY COR
PRIORITY COR
10
FLAT AUDIO
FLAT AUDIO
DE-EMPHASIS AUDIO
DE-EMPHASIS AUDIO
21.4 MHz FM IF / Audio Board Schematic Diagram - Extra Wideband
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