1
2
3
4
5
6
7
8
A
B
C
D
8
7
6
5
4
3
2
1
D
C
B
A
ISSUE
DRAWING NO.
23425
DRAWING TITLE
Drawn by:
DATE
Filename
ECO No.
DESCRIPTION OF CHANGE
J:\FILES\Products\A1_7_8_8P AMPS\Issue_2\L846C5_3.SCH
A & R Cambridge Ltd.
Pembroke Avenue
Denny Industrial Centre
Waterbeach
Cambridge CB5 9PB
ALPHA 1, 7, 8 & 8P AMP
Circuit Diagram
L846C5_2
LJW
22-Sep-1998
INITIALS
Date Printed
5
7
Sheet
of
Notes:
R31
1K0 CF
R40
33K MF
R24
2K7 MF
R19
5K6 CF
R23
2K7 MF
Q16
BC557B
Q7
BC556B
Q6
BC556B
Q3
BC556B
+
C9
100U EL
R32
33K MF
3
2
1
Z301A
NE5532
8
4
Z301C
NE5532
R33
680K MF
C6
47N PE
R38
680K MF
R37
47K MF
SRVOL
Q13
BC547B
Q12
BC547B
Q4
BC546B
Q8
BC546B
Q9
BC546B
Q10
BC547B
Q11
BC547B
Q5
BC556B
R30
33K MF
C8
100P PP
R25
330R MF
C7
4N7 PP
C5
33P PS
R20
15K MF
R22
120R MF
R28
18K MF
R29
1K2 MF
C4
47N PE
R17
5K6 MF
R16
2K7 MF
R8
470R FU
R12
470R FU
R9
470R FU
C14
15N PE
+
C11
100U EL 100V
R26
470R FU
R5
100R FU
D3
10V 400MW
D4
10V 400MW
R6
100R FU
R10
470R FU
R11
470R FU
R14
1K0 MF
AMPEL
R15
1K0 CF
R27
470R FU
-37V
R7
470R FU
R1
0R22 3W MO
R1A
0R22 3W MO
Q1
IRF540
D1
1N4003F
+37V
R4
100R FU
+
C1
100U EL 100V
C2
47N PE
D2
10V 400MW
R3
2R2 CF
C17
470P CD
R2
4R7 W2 CF
C3
100N PC
Q2
IRF540
C13
15N PE
+
C12
100U EL 100V
P15V
N15V
R18
2K7 MF
Q15
BC546B
R52
3K9 MF
RLY1A
RLY G5Z-2A-E
LHC
2
RHC
3
1
4
L
5
6
R
7
SK3
HPSKT
1
2
3
SW99A
2PCO
4
5
6
SW99B
2PCO
R49
330R 1W CF
R149
330R 1W CF
R150
100R W2 CF
R50
100R W2 CF
C20
470P CD
C18
1N0 CD
R41
470R FU
R42
620R MF
+
C16
100U EL
R45
18K MF
R35
33K MF
R47
4K7 MF
R48
47K MF
+
C19
100U EL
Q14
BC557B
R21
100R MF
C21
10N CD
C22
10N CD
Place Q15 by hsk.
Q17
BC546B
Q18
BC546B
Q19
BC556B
Top+
Top-
SK1A
CAMCON_G
Bot+
Bot-
SK1B
CAMCON_G
CHASS
SK1C
CAMCON_G
L1
2U2H LAC SMALL
PWRIL
IQ1L
IQ2L
SPLD
SPLE
HPL
HPR
HPE
SPLS
1
2
3
4
5
6
7
LK311
L825CA
HS1
E81801
HS2
E81801
HS3
E81801
HS4
E81801
R53
18K MF
1
2
3
4
5
6
7
LK311A
L825CA
CL1
E82201
CL2
E82201
R13
1K0 MF
R46
150R MF
TP9
TP10
TP12
TP11
TP13
TP14
TP15
TP16
PD6
PD6
TOOLING
1
2
LK7
10MM LINK
+
C10
22U EL OS
1
2
LK1
10MM LINK
98_1025
LJW
1
LJW
12-05-98
Initial release
D5
1N4148
+
C27
220U EL
C25
100N PC
R39
18K MF
C24
4N7 PP
C28
100N PC
C26
100N PC
D8
1N4003F
R34
1K MF
1
2
LK18
10MM LINK
RV1
10K PSET
LEFT CHANNEL
R70
680R MF
R51
15K MF
+
C30
10U CERAFINE
R36
100R FU
PWRIL
PROT_OP_L
OP_L
SP2_SEND_L
SP2_RETN_L
VI_CH2
VI_PROTECT
2
PREMUTE
SK3_7
SW99_3
SW99_2
SP2_SEND_L
SP2_SEND_R
SP2_RETN_R
SP2_RETN_L
OP_L
OP_R
98_1029
29-05-98
LISTENING APPROVAL