Drwn:
DBA 20
Circuit diagram
Vers:
Turnhallenweg 6
D-79183 Waldkirch
Germany
Tel: +49 (0)7681 2004 0
Fax:+49 (0)7681 2004 43
Schalipp
Date:
1.1
7.4.2000
IC 1d
1/4 TL064
Sw 3
-20dB / -40dB
R2
1M
R1
100k
R3
12k
C1
.022
C2
10p
+
R8 47k
C5 .001
D1 1N4148
D2 1N4148
R7
4.7k
C4
.022
CLEAN / DIRTY
Sw2
IC1a
1/4 TL064
R12
12k
R11
12k
C8
.001
C7
.0022
C6
4.7/63V
R9
680
R10
100k
LINE OUT
IC1c
1/4 TL064
R18
12k
R17
12k
C10
.001
C9
.0022
2
3
1
9
10
8
FILTER /
FULL RANGE
Sw 1
+
C12
4.7/63V
1/4 TL064
+
R16
12k
R13
220k
R15
12k
+
+
R14
100k
R21
100k
R19
680
R24
100k
R23
680
GND LIFT
Sw 4
+
R25
12k
BALANCED OUT
LOW Z
R20
12k
C11
4.7/63
D5
15V
D4
1N4001
+
C14
4.7/63
D3
1N4001
R5
220k
C3
.47
R6
220k
R4
1M
12
13
14
4
11
SPEAKER
OUT
FROM POWER AMP
FROM PREAMP
6
5
7
C13
4.7/63
*
Hand-soldered on back side of PCB
Battery 9V
+
R22
12k
*
INSTRUMENT INPUT
HIGH Z
