V1 - 12AX7LM

V2 - 12AX7

C9 470p
REL3A

R16 BRIGHT
470K
MID SHIFT S3
+C +C +C +C S2
R17 R27
470K R23 C14
R3 R5 R8 C7 R15 R20 C13 10M 270p
100K 1M 100K 100K REL2 100K 10M 1n
1W C2 1W C4 270p 1W 1W REL3B
6
C10 R24 R26 8

C3 220K 470K
47n 22n R10 C8 470p CW
470p R22 9
V1A 1 REL1 V1B 6 470K V2A 1 4n7 V2B 6 P3
33K C11 B200K R28
4 S1 220K
R2 5
2 7 2 7
CW P4
R11 22n
10K R6 A1M
3
3
470K 8 680K 8 C12 P6 CW
3
A200K
2 7 1
C1 CW CW R7 C5 R21 CW P5
R1 R4 R9 R13 R14 R18 R19 22n R25
220K 820E B20K
1M 2K7 P1 P2 1K5 180K 1K5 1M 470K 1W 470K
C6
680n 22u
A200K A200K 470p
R12
220K
INPUT CL VOLUME OD DRIVE H/M/L TREBLE OD VOLUME
BASS
MID

KOCH DRAWN: DATE: MARK

GUITAR ELECTRONICS Dolf Koch june-2005 STUDIOTONE 1.3
Amersfoort
The Netherlands
c Copyright 2003, Koch Guitar Electronics
SERIAL NRS:
x445 - x . . .
PRE-AMP PAGE:
1 of 3
 +B IC1,2 - TL071
+A
IC3 - TL061
T1 - BD136
T2 - BD135
+E 7 R44 V3 - 12AX7
V4
R36 R37 V4,5 - EL84
100E
from preamp TO FX FROM FX 100K 150K 1W TX1 - VDV-G25
7 1W 1W
3 C22 9
+ R31 R40
6 2
IC1
2
- C21
1K 100n 47K SPEAKER
3
R30 4
OUTPUTS
1M TX1
68p
R38 R42 C25
-E 16 ohms
V3B V3A 220K 330R
1 6
R32 1W 100u +HT
47K 40V 8 ohms
2 7
+D
3 8 R43 C26 R46 4 ohms
C39
R39 330R 8E2
100n R63 1W 100u 25W
220K
6K8 40V
R61 R33 R34
T1 SPEAKER
4K7 47K 6K8 S4
R64 C23 3 OFF/ON
R41
2 R47
2 7 220K 47K
- R66 100n 9
6 R45 LINE
IC3 C24 47K
C41 3 R35 100E R48 OUT
R60 + 33E 100u V5 1W
4 3W 1K 25V 7 1K
R49
4n7 10K T2 C27 68K
R70
R65 -G +A TO CLEAN
R62 C28
6K8 33n R50 INPUT
100K 22K
330E 470n
Reverb Can: R71 R53 R54
Accutronics +E 22K R51 R52 C31 10K 10K
8AB3C1B -D
RECOR
3 7 470E 100mH 470E 47n S5
+ C34 R55 DING
6 11 C33 4n7
IC2 4n7 2K2
C42 2 4n7
R67 - C30 1x12/4x12
4
CW
10 C29 C32 C36
2n2 220K R69 P7 47n R56
15n 22n S6 C35
B20K Mike position 15n 470n 2K2
-E 22K
R68 C37 1u C38 470n
4K7 REVERB HEAD
R57 R58 R59
C43 VOLUME PHONES
470n 220E 100E 100E
2W 2W 2W

KOCH DRAWN: DATE: MARK

GUITAR ELECTRONICS Dolf Koch june-2005 STUDIOTONE 1.3
Amersfoort SERIAL NRS: PAGE:
The Netherlands POWER AMP
x445 - x . . . 2 of 3
 T3-5 - BC547
TX2 - TXM-25.1
STANDBY HT FUSE
+C +B +A +HT 4x 230 V
1N4007
R80 R81 R82 R83 Z2 115 V POWER
TX2
100 V
C50 3K3 C51 3K3 C52 3K3 C53 2K2 C54 T315mA
5W
300V
22u 22u 22u 47u 47u
450V 450V 450V 450V 450V
MAINS

+E -E +D -D 2x
R84
100E 1N4007 Z3 Z1

AT1.6 10V 230V - T1.0A

Ceramic 100/115V - T2.0A
C55 C56 R85 C57 C58
+D 100E
100u 100u 3300u 3300u 6,3V
25V 25V 16V 16V to filaments
R87 V3-5
33E
3W

C59 R95 R96

R86 R88 100E 100E
1K 1K
3300u
16V
V1 V2
REL1 REL3
REMOTE CHANNEL 1N4148 1N4148 12VDC 12VDC
SWITCHING 4 5 4 5
9 9

+HT
C60 C62 R93 R94 -D C64 +D
REL2
12VDC 2K2 2K2
10u 10u R91
1000u
63V 63V 1M 16V
Green Red
R89 R90 12
V3 V4-V5
T3 T4 T5
10K 10K R92
S7 C61 C63 22K 4 5
2n2 2n2 9 4 5

CLEAN/OD/OD+ filaments

KOCH DRAWN: DATE: MARK

GUITAR ELECTRONICS Dolf Koch june-2005 STUDIOTONE 1.3
Amersfoort
The Netherlands
c Copyright 2003, Koch Guitar Electronics
SERIAL NRS:
x445 - x . . .
POWER SUPPLY, LOGIC PAGE:
3 of 3