R22
CUST SELECT
R23
820K
C24
2200PF
2 Pole High Pass
C16
2200PF
C9
.01UF
R26
100K
5
6
7
U7B
LM358
R37
510K
Notch
R25
33.2K 1%
C14
.01UF
R11
82K
C10
.022UF
R14
56K
R12
6.8K
2
3
1
8
4
U7A
LM358
R13
2K
+5VDC
C25
2200PF
C8
.022UF
R41
20K
R42
20K
C6
.01UF
R43
680K
3 Pole High Pass
+5VDC
2
3
1
4
1
1
U5A
TL064B
R18
470K
Vb
**MODULATOR**
R15
470K
VB
12
13
14
U5D
TL064B
X0
12
X1
13
Y0
2
Y1
1
Z0
5
Z1
3
INH
6
A
11
B
10
C
9
X
14
Y
15
Z
4
VDD
16
VSS
8
VEE
7
U4
4053
Vb
**UPPER SIDEBAND FILTER**
R40
110K
C26
2200PF
2
3
1
4
1
1
U3A
TL064
C15
2.2UF
C5
2.2UF
+5VDC
VB
1
J1A
RX AUDIO
OUTPUT
R51
180 OHM
5
6
7
U5B
TL064B
C11
1000PF
C13
120PF
R10
100K 1T
R44
240K
R21
100K
R20
100K
R46
CUST SELECT
VB
Sync Adjust
R19
160K
+5VDC
R17
2M
10
9
8
U5C
TL064B
**SYNC DETECTOR**
5
6
7
U3B
TL064
R8
1M
R7
CUST SELECT
VB
11
J1K
RX AUDIO
INPUT
C27
330PF
C4
.047UF
R47
CUST SELECT
R5
56K
C2
1000PF
R6
1M
VB
VB
VB
C3
.01UF
12
13
14
U3D
TL064
R45
1M
R4
62K
**EEPROM**
DI
5
DO
6
CLK
4
CS
3
VCC
2
GND
7
U6
93LC46
+5VDC
R24
56K
R16
56K
C19
.01UF
R27
470 OHM
C17
2.2UF
C18
2.2UF
10
9
8
U3C
TL064
R39
820K
VB
13
J1M
TX AUDIO
OUTPUT
8
J1H
EE SK &
CIPHER/CLEAR
LED
R52
180 OHM
+5VDC
R28
100K
2
J1B
EE DI/DO
7
J1G
EE CS
R53
47 OHM
R48
10K
R49
47K
Q1
MMBT3906
+5VDC
R38
1K
1
2
4
5
3
U8
TC4S66
+5VDC
R1
470K
R9
82K
C7
.01UF
VB
6
J1F
PTT INPUT
12
J1L
TX AUDIO
INPUT
C28
330PF
3
J1C
POSITIVE (+)
SUPPLY
**REGULATOR**
R3
10K
VIN
8
FB
7
TAP
6
VOUT
1
SENS
2
ERR
5
SD
3
G
N
D
4
U2
LP2951
C23
2.2UF
R35
470K
R34
6.8K
R50
47K
+5VDC
+5VDC
PA7
3
PA6
4
PA5
5
PA4
6
PA3
7
PA2
8
PA1
9
PA0
10
TCMP
24
PB7
13
PB6
12
PB5
11
PC7
15
PC6
16
PC5
17
PC4
18
PC3
19
PC2
20
PC1
21
PC0
22
PD7
25
PD5
23
IRQ
2
RESET
1
GND
14
VCC
28
O2
26
O1
27
U1
68HC05P1
R31
3.6M
R36
470K
Y1
3.58MHZ
R29
47K
R2
47K
R54
470K
+5VDC
+5VDC
R30
47K
4
J1D
CODE
SELECT 1
5
J1E
CODE
SELECT 2
10
J1J
CLEAR/CIPHER
INPUT
+5VDC
R55
10K
R56
10K
Q2
MMBT4401
R32
10K
C21
22PF
C20
22PF
VCC
+5VDC
+5VDC
C22
4.7UF
R33
6.8K
VB
C1
.1UF
9
J1I
NEGATIVE (-)
SUPPLY
Note:
Sync level set = 2.5Vp-p
