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SST-4B78-PSB
SST 2XLR + SST 2SWITCH PCB'S
CASE TO-126 77-04
TRANSISTORS
CASE 221A-02 CASE 340G-02 T0-3PBL
1 D MJE182 MJE172 TFET BS107A 2 G 3 S BS107A 1 S 2N7000 D G S 3 D 2 G TFET 2N7000 S G D
CASE T092
WG2
WG1
PN100A PN200A E B C
2N5550 2N5400 E B C
100N
CG RG
MJL21193 MJL21194
B C E
100R BR1
ECB BCE
1 2 3
1 2 3
1 2 3
1 2 3
SST-MB
+30B 9 J3 .1u C2 90K9 4K75 22P C18 A R53 R44 D7 VR1 10K OFFSET Q22 2N 5400 R55 90K9 475K 100P C12 2N 5400 100p R40 2K21
SST-PWR 5.25"
R1 11 S 1 4 J3 C3 470u R3
20K
1V
470/16 Q17 C6 499R R34
R9 22R R3
0R20 5W
49R9
J1 J1 R2
20K 20K
20K0 20K0
T R 3 2 10
S2 CH1 GAIN
B A U 2V
S3
A
20K
R19
R7 R8
20K
R1A R2A
CH 1
REG ONLY J1
1K VR1
INDIVIDUAL BRIDGE
I E B
1K0
R24 1K5 10 2N 5550 9 J2 J2 D3 R52 4K75 R37 1K5 2N 5550 Q12 Q16 J2 R32
1V B 2V B C1 R4
20K 20K
47P C4 R10
1K0
C2
220p Q18
Q2 MJE 15031
MJL 21193
C27 Q27
S1 BAL/UNBAL
9 J1
R54
150R 2N 5400 R22
-30
C6 .1u PRO ONLY R12
-30 B
CH 1
DOA68
B 8
1MEG
J3 C7
6
J6
J3 4 5
J5
4 5 J3 2K21 R49 Q26 PN 100A R50 1MEG 6 J3 C18 220p R47 R46 PN 100A
Q1
MJL 21194
J1
R 1-3 C 11-14
R42
475R
100K
6
1N4004
R5 1V C U
J1 +30
D1
0R20 5W
49R9
.1u
6 7 8
1 3 2
+30 A COM -30 A
Q25
220p
2V C2 2
49K9
47p C13 A
MJE 182 R38 1K0 4K75 Q19 68P C22 R28 470p C7 7K15 5 J2 C8 470p R29 R15 R26 2K0 R39 8 D3 1K74
100R 3W
R5 R16 499R 2K0 R25
R15
R24 220p
RCA JK
J4 1 J4
R11 4R7 5W 10R 3W R12 L1 2uH J1
R 1-3 C 6-9
15K
15K
R9
20K0 20K0 2200u C17
R48 499R
1
R6
R9A 2 I A
B
J2
1K0
Q24 R124
100N PN 200A Q23 C14 VR2 47p C11 100P 100K C15 A
R57 BIAS Q20 2K TRIM 3K32 R58 2N 5550 F1
S4 CH2 GAIN
R12
20K0
B 1 1V R18 A B 2V
20K
29K4
R125
PN 200A
499R R36 RXE010 R10 7 J2 A 4 J2 Q10 2N 5550 Q9 R21 150R 3 J2 SW1
67F080
0R20 5W
TP1
R16
49R9
1N4004
I
29K4
D2
2 S 1 4 J3 2 R 3 T 2 1
J1 J1 R14
20K0
J6
1
R12A B R14A
2N 5400
Q14
CH 2
C5 470u R13
20K
S5
I 1V B 2V B A D
R19A 7B ONLY
20K 20K
2 2 3 J3 3 4
R43
Q3 Q4 MJL 21194
MJL 21193
20K
20K
Q21 2N 5550
Q28 100p C28
2N 5400 R31 1K5
47P
C8 .1u +30 3 J1 C7
R19
C1 220p R23 1K0
MJE 15030
BAL/SE
B
D8
G5V-2-H1-48V T
I J3 .1u 1
1K VR2 -30 B 475R 2 10 4 J3 J3 J3
2N 5550
Q11
R33 499R C5 470/16 R8 22R
J1
R 1-3 C 1-4
A
4K7
R45 C19 22P
-30V
C6
R15
20K 20K
R16 1V C U
B
I C B
1MEG
1 2K21 2 + MUTE RLY
J2 J2
0R20 5W
DOA68
4 J1 -30 C6
49R9
R21
1K0
F B
.1u C1
TP2
R6
R18
R41
220p
2V C7 2
49K9
5760
RCA JK
J5 1 J5
220p R22
R20
PRO ONLY R23
RLY+ GND
RL1
D10
1K0
A
R17
INPUT AMPS AND MODE SELECT AND GAIN
+15
11
J3 1u5 C101 R135
13
SIG TO CH2 PSB -30 A COM +30 A
4 1 3 2 B R126
14
U1
R132
R131
100K
12
1M0
10K
10K 750R
+15
Rev 1c change D3 + D5 ON PSB TO 1N4737. Rev 1B change C26, C8 to 10N and R44 to 30K1 on SSB
REV 1A JULY 9, 02 ADD R60A 4K99 TO MAIN BOARD
R136
U1 - TL064B
6
U1
7 11
-15
4
A
15V
TEMP
15V
9 10
U1
5 2
U1
8 D100
R108
U2-4011
6 3 4 CLIP
14
R102 R100
MUTE
BS107A Q60 R104
150K
150K
604R
1K0
2u2 C105
+
1
499K
1K0
R133
R105 1N914
R106
1N914
1K21
2K21
1
R130
34K8
34K8
2
5 13 A
10K 10K
7
3
R129
220p
C119 R66
VR3 1K
R101 D61 A
R103
D60
11
Q64 Q63
LED BRT ADJ A
R60A
1N914
D66
100K
499K
100K
R127
C103 1u5
R134
A
R60 Q61
J3 3 MUTE 8 GRN
1M0
12 2N7000
2N7000 Q62 2N7000
3B-SST SCHEMATIC
B -15 1 J3
A
A
A
7 RED
Page 1 of 2
SST-4B78-PSB
RLY+ +30 B +30 A -30 B
1N4737
D24
1N4004
4K75
R47
POWER WG1
INLET
100V 120V
230V
+
1K0
C27 100u 63V
8 1N4758 6 4
RL2
9 1 11 2 F1 4 3
D3 D2
1N4740
C2
D5 D4
1N4740 1N4737
C5
Q4 7815
MAC 2213A10FP
MJE 15031
Q1
MJE 15030
Q3
1N4754
WR1 AC HIGH 30K 30K 33R 22R
R14 R13 PR3 PR2
1N4754
470u C9
S1 2 1
2u2
C17
1u5 +
R32
10K
IL4108 F2
2W PR4 6
D9
1N4004
F1 TR250-120
BREAKER MA2 100V-6A 120V-5A 230V-3A
WR2 WR4
NC
NO
4 U2 D5 1
510R
2W PR5
LM 2931A
Q5 P1N 14 U6 + U7 TP
200R
+ C1
+ C3
C6
C4
R33 R31
R38
+
2u2
C16
D10 1N4004 C11 470u R9 TEST 1N4004
2
1K0
2
R55
R56
Q8
R30
RL1B
PN100
18K2
-65
14Ga BLK
+
C26 10N POWER SWITCH TOGGLE 8 9 U7=4011 14 C13 .1u
5 MOC8100 1
D14 22u D16 R24
1N4004
J1
+65
R3
C2
R4
C3
D2
R6
R7
+
PN100A
Q1
C12
4
U5
2
CP 1+2 10,000u/80v
+
J6 7 8
120V POWER TX WIRING BLK
16 CH1
15
14
13
12
11
10
9
18K2
TURN ON THRESHOLD 10 R23 3 S2 2 1
RED
16 15
U1
R11 VR1 10K Q7 PN100A
TDA 1085C
1 2 3 4
R2
ORG J1 5 GCS 6 BRN 1
C6 10N C8 C11 D15 KBPC352 C10 10N
14 13 12 11 10 9 AC LOW J2
5
6
7
8
D3 1N4740 C1 47u 35v 1N4004 D4
12
13
15K0
R26 C8 10N
BLUE
GRY
200K
200K
R1 R17 R17A
D1
1N4004
4K99
R22 Q6 11
1MEG
R36 12 13 D24
1N4004
R8
R27
49R9
230V 120V
33R2
100V OPT 'C'
267R
R18
C6
100u/35V 100u/35V C5
8
9
C22 .47u
2 GREY
WHT VIO
D15
2u2
R25
1N4004
+
CM 1+2 10,000u/80v
C7 1N4741
R28
R44 11
R5
10R 267R
10
18K2
R16
100K
18K2
R12 Q2 4 5 CNY17-3 1 2
604R
NC
NO
D8
RL1A RL1
G5V-H1-24V 1N4004 D6 D13 2
1N4004
D23
RED
BLK
2 3
PN100A
U9
Q4 IL4108 2N7000 1 5 C14 .1u 14 2u2 6 + C23
ORG BLUE J1 -65 BRN GRY
4 5 6 7 8 J2 AC LOW
IL4108 6 6
1
SOFT START TURN ON
R40
1N4004
1
U3
4
4
2 U4
4
C10
+
1 2
CNY17-3 4 5
WHT WB1 GND C7 100N TO SPEAKER OUT RED 100V POWER TX WIRING BLK VIO
150R
R21
1N4004
D12
100u/35V
EXT PWR UP RELAY
GREY
U8
D22
1N4004
MUTE
R52
R51
R48
CNY17-3 1 2 5 4 2N7000 Q3
15K
15K
1N4752
2K21
C28 20u50
1 2 3
D18
WR1
U10 LEDS
MUTE COM PSW PSW
ORG BLUE GRY
J3
4 5 6
J4 3 2 1
GRN
BRN
7 8 J2
CH2
RED MUTE
WHT VIO
SOFT START + LED 3B-SST-SCH 1B AUG 26, 02
Rev 1B change C26, C8 to 10N and R44 to 30K1 on SSB
J3 3 MUTE 8 GRN 7 RED 3 2 1 J6 MUTE GRN RED
1 2
PSW PSW COM MUTE
GRN COM
1 2
1 2
MEMSW
1 2
1B
3 4
Rev 1c change D3 + D5 ON PSB TO 1N4737.
3 2 1
J2
MUTE GRN
CH1
RED
3BSST LED
Page 2 of 2
SST-MEMSW
GREY
3B SST SCHEMATIC
J3
J1
1MEG
10N
C9
230V POWER TX WIRING
CH2 AC HIGH 1
R43
R41
R37
1
475R
18K2
+
+
+
1u5 330u 50v 50v
1u5 35v
330u 50v
14Ga BLK
200R
R2
R3
D1
R1
R6
R5
D6
WR3
+
-30 A
33u/25 + A -40v R4
+15
-15
Q2 7915
EXTERNAL TRIGGER OUTPUT
33u/25
+
N
P1 G
L
Q10 25VAC 4 3
OPT A
D17
R47
13 48V RLY
EXTERNAL TRIGGER INPUT 4-12V AC/DC 1MA
WHT WW1
2
1
TX1
FT2984
+
1
7680
16
A
CHASSIS R7 CH2 WG2 WG3
D7
2 X 33,000u/6.3V
100R 2w
100R 2w
+40v
BR1
1 499K
D18-21
R42
5 PR1
7
OPT B 120V 230V
8
100V
C20
+
C21
221K
220N
R19
C18
.1u
475R
GS3
F2 RXE010
R35
C19
49K9
R39 C15
1N4004
100R
R34
PN100
Q9
D11
3
68R 2w
3K9 2w
3K9 2w
68R 2w
3K9 2w
3R
R15
+
10K
10K
1K0
301K
10N
267K
475K
475R
1N4688
50N
12K1
2M21
8K25
+ + +
49K9
30K1
+
1K0
100K
4
3
1
2