Uhf rf schematic – Midland Radio SP-300 User Manual
Page 49
PAGE -46-
May 2001
UHF RF Schematic
6
TX 5V
1
D20
KDS160
R43
10K
MOD
C57
470P
MOD
2
4
3
5
7
4
PWR H/L
STREENG
5
6
1
2
G
A
1
-
I
N
+
I
N
G
N
D
O
U
T
V
C
C
B
.
P
G
A
2
LM386N-3
AUDIO AMP
OSO 1
LD 2
*R 3
*V 4
VPD 5
PD 6
GND 7
RX 8
FIN 10
FIN
11
VCC
12
VDD
14
EN
17
CK
18
DT
19
OSI
20
TST1 9
TST2
13
O/B
15
O/A
16
MC145191F
PLL EN
DATA
CLOCK
OUT
B+
TCXO1
12.8MHz
TCXO
MOD
GND
2
1
M
I
X
I
1
6
O
S
C
1
1
Q
U
A
D
8
D
C
O
U
P
7
D
C
O
U
P
6
L
M
T
I
5
V
C
C
4
M
I
X
O
3
O
S
C
2
2
A
F
9
F
I
L
I
1
0
F
I
L
O
1
1
S
Q
I
1
2
M
E
D
R
V
1
3
M
U
T
E
1
4
G
N
D
1
5
IC5
MC3371
CHARGE
VOLUME
N/S SW
SPK
AUDIO
ALERT
AF EN
POWER SAVE
LOCK D/T
P/S 5V
TX EN
RX EN
TX 5V
BUSY
12
11
13
14
16
15
17
18
1
2
4
5
6
7
P.A. MODULE(UHF) SCHEMATIC
P/N: 650-230-0013
VCO TX SECTION
(UHF)
P/N: 650-030-0020
VCO RX SECTION
FRONT-END (UHF) SCHEMATIC
P/N: 650-110-0013
FUSE
SCHEMATIC
P/N: 650-200-0004
NICAD
BATTERY
7.5V
P/N: 650-210-0010
+
+
-
R37
1.2K
Q14
KTC3875S(ALL)
R36
0R
C53
1uF
C54
220P
L4
18NH
R41
22
R35
5.6K
OUT
C46
3P
Q16
BFR92A
(P2)
R26
18
R27
4.7K
C47
220P
C45
220P
R28
220
PRE OUT
R25
4.7K
Q13
KTC3875S(ALL)
D18
KDS160
C44
4.7/10(T)
R24
5.6K
L3
100NH
C39
470P
OUT
C43
5P
Q12
BFR92A
(P2)
C37
5.6P
L1
18NH
L2
18NH
C42
27PF
R21
33
R22
4.7K
R23
100
C34
220P
C35
220P
C36
7PF
C38
15PF
C41
6PF
R42
12K
C51
6P
R34
18
C50
12P
R31
300
R32
300
R33
6.8K
Q17
MMBR951
L5
18NH
C56
12P
C55
470P
C58
470P
TX5V
C61
470P
R49
22R
R45
22K
R63
150
R23
KRC104S
RV3
10K
C62
470P
R46
2.2K
C63
0.01
C79
0.1uF
6
5
R50
1M
R79
10R
C14
470P
Q18
KRC104S
(ND)
R52
3.3K
IC3B
LM358
7
TX B2
C64
470P
C65
10/10
R47 2R2
R48 2R2
R51 2R2
Q22
KTA1663
(HY)
R53
10K
C88
0.1
R54
1K
C70
1uF
B+
C66
470P
Q21
KTC3875S
(ALL)
R55
1.2K
RV1
10K
R64
22
C59
0.47
(40)
R110
270
C80
470P
Q19
KTC3875S
IC3A
LM358
C81
470P
1
4
8
2
3
5V
D17
5817
C60
4.7/10
C68
27PF
TX B2
R56
270
C67
470P
L6
820NH
L7
3T
C76
N/F
C72
N/F
R109
0.1
1W
B+
R59
39
R57
100K
1%
R99
100K
1%
C82
470P
C78
470P
C84
470P
RX 5V
L8
3T
L11
3T
C73
3PF
C74
8PF
C75
4.7PF
D5
UPP9401
C77
470PF
ANT1
STUD
L13
3T
C49
N/F
R58
470K
D6
UPP9401
R69
470K
C83
12P
OUT
GND
C87
22P
R65
51
L14
680NH
T2
4
3
2
1
LK100 N/F
D9
ND433G
5
6
7
8
T3
MIXER
C69
N/F
L31
N/F
L12
N/F
XF1
45.1M
R66
100
C94
1uF
C90
11P
C92
18P
C93
82P
L15
150nH
B+
PWR
SW
SWB+
R113
470K
R114
100K
Q34
KRC104S
(ND)
Q33
KTA1504S(ASY)
C134
0.047
C132
4.7/20
C133
1/16
5 6 7 8
R85
39K
R84
18K
TH1
33K
R83
18K
R82
10K
C105
47P
D11
KDS193
(F3)
R78
2.7K
C104
0.001
Q26
KTC3875S
(ALL)
R76
22K
R77
22K
R81
2.7K
C95
4.7/10
C102
0.1U(K)
R74
22K
18-27K
D8
KDS193
(F3)
R68
22K
Q24
KRC104S
(ND)
R67
22K
TP1
C25
1uF
R15
100
R16
910
SWB+
7.5V
Q7
KTA1504S
(ASY)
R908
10
C911
0.01
R909
470
C26
0.1
16V
R17
12K
Q905
KTC4075
R907
27K
R906
7.5K
R3 2.2K
C905
18P
R904
7.5K
Q904
C906
18P
KTC4075
R905
27K
C910
0.01
R902
2.2K
R903
4.7K
R901
2.2K
Q903
KTC4075
Q901
KTC4075
C908
33P
Q902
KTA2014
C904
0.01
C903
0.01
D902
KDS226
D901
KDS226
C907
0.1
C901
0.01
C902
0.01
5V
R125
22
R130
100
C13
0.01
C16
2P
IC2
R4
R5
R6
2K
1.8K
1.8K
R7
1.8K
Q6
KTC3875S
(ALL)
Q11
KTC3875S
(ALL)
Q8
KTA1504S
(ASY)
C24
0.01
(P)
R14
2.7K
R13
2.7K
R12
5.6K
C96
0.01
C97
30P
R72
220K
R71
1K
C98
0.001
Q25
BFR92A
(P2)
R75
47K
R87
330K
C107
10P
R86 1K
C103
470P
C108
0.0015
SQ
C106
0.01
RV2
1KB
Q27
KTC3875
(ALL)
L16
1mH
C112
0.033(K)
L17
1mH
C113
0.1U(K)
R88
100
IC6
C137
470P
4
3 2
1
R116
22K
R115
47
C135
10/4
VR3
20KA
R123
0R
LK501
N/F
R117
22K
R122
4.7K
R118
N/F
R121
220K
C114
0.01
R92
2.7K
C111
0.1U(K)
C116
0.01
R91
470
C115
220P
Q28
KRC104S
R89
22
RV4
1KB
R93
100
R96
39K
L18
1uH
C23
0.01
(P)
C22
0.022
(P)
TX 5V
C21
0.33
(P)
R11
100
R8
910
5V
C17
0.1
C18
0.001
SWB+
5V
Q4
KRA110S
(PK)
C15
0.1
R2
100K
IC8A
LM358
2
3
8
1
4
R126
10K
R128
10K
R18
10K
C10
10/4
C152
470P
R132
5.6K
RV5
10K
FREQ ADJUST
5V
L19
10uH
Q5
KRA104S
(PD)
C20
470P
C1
470P
IC1
TK11450
C2
10/6.3
C3
470P
Q1
KRA102S
(PB)
5V
TX 5V
C5
470P
C6
4.7/10
Q2
KRA110S
(PK)
C7
470P
R97
10
R94
1K
C127
0.01
C117
47P
C129
10/16
X1
44.645
C118
33P
C121
20P
C122
.001
R98
10K
C123
0.01
C124 C125
0.1U(K)
R95
82K
T1
3210796
D12
KDS193
R106
22K
Q31
KRC104S
C126
0.01
B+
D15
4004
C146
220P
C145
470P
R107
N/F
D14
KDS181S
R108
56K
Q32
KRC104S
R105
27K
CF1
455F
CF2
455HT
R112
R111
R103
10K
R104
10K
C131
0.01
R101
N/F
R102
22K
D13
KDS181S
C128
10/10
5V
RX 5V
C4
470P
Q3
KRA110S
(PK)
C9
0.01
D1
KDS181
(A3)
C109
470P
C12
10/6.3
R1
10K
C8
470P
C11
0.1
10K
22K
REVISIONS
CHG B
Y
DATE
DESCRIPTION
DESCRIPTION
RELEASED TO MANUFACTURING
REV
A
DC
04/01
TITLE
SCALE
SHEET
OF
SIZE
DOCUMENT
NUMBER
B
1
1
NA
SP-320 / SP-340
UHF RF SCHEMATIC
R135
4.7M
R62
68K
1%
R61
68K
1%
+
+
+
+
+
-
+
+
+
+
+
+
+
+
+
-
+
+
-
R70
470K
C19
220P