TWINTONE
PRE-AMP
PAGE:
1 of 4
KOCH
GUITAR ELECTRONICS
Amersfoort
The Netherlands
DRAWN:
Dolf Koch
Copyright 1995, Koch Guitar Electronics
DATE:
march 2001
c
SERIAL NRS:
x631 - x760
MARK:
4.0
REL1
to fx mixer
R2
R1
R16
R30
R21
R17
R3
R31
R32
R11
R15
R26
R10
R20
R14
R22
R25
R6
R29
R4
R23
R18
R8
R27
R12
R5
R24
R19
R9
R28
R13
P5-B
P5-A
P1
P6
P2
P7
P4
P10
P9
P3
P8
68K
68K
220K
470K
470K
220K
1M
100K
1W
220K
33K
470K
470K
220K
220K
470K
470K
470K
100K
33K
100K
1W
100K
1W
100K
1W
100K
1W
100K
1W
150K
1W
1K5
1K5
1K5
1K5
820
1W
2K7
470KG
470KG
220KN
220KN
220KG
1MG
1MG
220KG
1MN
22KN
22KN
+E
+D
+E
+D
+D
+E
C5
C14
C7
C10
C11
C3
C17
C2
C16
C4
C18
C9
C13
C19
C20
C1
C12
C6
C15
C8
100n
47n
47n
470p
4n7
100n
22n
270p
470p
47n
22n
470p
470p
270p
4n7
22u
470n
22u
22u
680n
3
3
3
8
8
8
2
2
2
7
7
7
1
1
1
6
6
6
V1A
V3A
V2A
V2B
V3B
V1B
CW
CW
CW
CW
CW
CW
CW
CW
CW
CW
CW
TREBLE
BASS
MID
TREBLE
BASS
MID
low
INPUTS
high
VOLUME
DRIVE
PRESENCE
VOLUME
V1
- 12AX7WA/EH
V2,3 - 12AX7