Koch Studiotone schematics.pdf

V1 - 12AX7LM V2 - 12AX7

C9

470p REL3A BRIGHT

R16 470K +C

R3 100K 1W

V1A R2

1

270p

C4 22n

V1B

R10 470K

6

4

3

3

R4 2K7

C1 680n

P1 A200K

CL VOLUME

KOCH GUITAR ELECTRONICS

Amersfoort The Netherlands

8

R20 100K 1W

V2A S1

5

R11 680K

1

C8 4n7

V2B

10M C10 R22 33K

6

C13 1n R24

470p

CW

C11

7

2

8

3

22n C12

CW

22n

CW

220K P3 B200K P4 A1M

1

7 CW

R6 470K

REL2

R27

R23

6

7

2

INPUT

C3 470p

47n REL1

R15 100K 1W

S3

S2

+C R17 470K

C7

R8 100K 1W

2

10K

R1 1M

+C

+C

R5 1M C2

MID SHIFT

CW

R7 220K

R9 1K5

P2 A200K

C5 22u R12 220K

OD DRIVE

c

C6 470p

R13 180K

R14 1K5

R18 1M

R19 470K

R21 820E 1W

TREBLE BASS MID

H/M/L

Copyright 2003, Koch Guitar Electronics

P5 B20K

DRAWN: Dolf Koch

DATE: june-2005

SERIAL NRS: x445 - x . . .

10M

C14 270p REL3B

R26

8

470K

9

R28 220K P6 A200K

CW

R25 470K

OD VOLUME

STUDIOTONE

MARK 1.3

PRE-AMP

PAGE: 1 of 3

+B

+E from preamp

3 2

+

TO FX

7 6

IC1

FROM FX

R31

-

R30 1M

R36 100K 1W

V4

R37 150K 1W C21

1K

4

IC1,2 IC3 T1 T2 V3 V4,5 TX1

+A

C22

R40

100n

47K

7

R44 100E 1W

9 2

V3B R32 47K

1

V3A

SPEAKER OUTPUTS

3

TX1

68p -E

R38 220K

6

2

- TL071 - TL061 - BD136 - BD135 - 12AX7 - EL84 - VDV-G25

C25

R42 330R 1W

16 ohms +HT

100u 40V

7

8 ohms

+D 3

C39 100n

R64 2

4n7

3

R60

220K

7

IC3 +

6

R35 1K

33E 3W

4

C23

R41

100n

47K

C24 100u 25V

100u 40V

R70

R65 6K8

2

R47

9

R45 100E 1W

7

47K

+E 3

R67 220K

2

-D

7

+ -

-G R71 22K

+A

IC2 4

-E R68 4K7 C43 470n KOCH GUITAR ELECTRONICS

Amersfoort The Netherlands

R51 470E

6

11

33n

100mH

R53 10K

R52

C31

470E

47n

S5

10

P7 B20K

C29 15n

C32 47n

1x12/4x12

C30 22n

R54 10K

Mike position

S6

22K C37 1u REVERB VOLUME

C35 15n

LINE OUT

C36 470n

RECOR DING

R56 2K2

C38 470n R58

R59

220E 2W

100E 2W

100E 2W

DATE: june-2005

SERIAL NRS: x445 - x . . .

TO CLEAN INPUT

470n

R55 2K2

R57

DRAWN: Dolf Koch

C28

R50 330E

C34 4n7

C33 4n7

4n7

CW

R69

R48 1K

R49 C27 68K

22K

Reverb Can: Accutronics 8AB3C1B

SPEAKER OFF/ON

S4

3

V5

4 ohms

R46 8E2 25W

T2

R62 100K

2n2

R34 6K8

R66

10K

C42

R33 47K

T1

C26

R43 330R 1W

R39 220K

R63 6K8

R61 4K7

C41

8

HEAD PHONES

STUDIOTONE

MARK 1.3

POWER AMP

PAGE: 2 of 3

STANDBY +C

+B

+A

R80 C50

R81

3K3

3K3

C51

22u 450V

22u 450V

R83

C52 3K3

C53

2K2 5W

22u 450V

47u 450V

HT FUSE

4x 1N4007

+HT

R82

T3-5 - BC547 TX2 - TXM-25.1 230 V

Z2

115 V

TX2

T315mA

C54

POWER

100 V

300V

47u 450V

MAINS -E

+E

R84 100E

+D

-D

2x 1N4007

Z1

Z3

230V - T1.0A 100/115V - T2.0A

AT1.6 10V Ceramic C55

C56

100u 25V

100u 25V

R85 100E

+D R87 33E 3W R86 1K

R88 1K

C57

C58

3300u 16V

3300u 16V

6,3V to filaments V3-5

R95 100E

C59

R96 100E

3300u 16V V1

REMOTE CHANNEL SWITCHING

1N4148

4

C60

REL2 12VDC

10u 63V

R89

R90 T3

S7

+HT

C62

10u 63V

10K C61 2n2

R93 2K2

R94 2K2

12

Amersfoort The Netherlands

-D

4

9

5

+D

C64 1000u 16V

Green

Red V3

T5

T4 10K C63 2n2

5

9

R91 1M

R92 22K

4

CLEAN/OD/OD+

KOCH GUITAR ELECTRONICS

V2

REL1 REL3 1N4148 12VDC 12VDC

9

V4-V5 5

4

5

filaments

c

Copyright 2003, Koch Guitar Electronics

DRAWN: Dolf Koch

DATE: june-2005

SERIAL NRS: x445 - x . . .

STUDIOTONE

MARK 1.3

POWER SUPPLY, LOGIC

PAGE: 3 of 3