nobels_prec_preampeq.pdf part of Nobels PREC nobels_prec_preampeq.pdf, guitar preamp / booster text manual preview

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1

2

3 V+ R15

4

5

6

LEVEL
3 P1 V9 50KA 2 C15 33 C31 27N 2 V-

C32 3

2

Q2

F 1K R14 56K 1 pow INPUT E J1 3 C11 2 1 J8004 56N R11 1M R12 3K9 3 C12 1 4 2.2 R13 33K Q1 K222E V+ C14 100P V+ 1 3 U1A 5 2 R16 11K V4558S C16 2.2 R32 3K3 2N7 R33 100K

C2362G

F

TREBLE
R34 2K2 C21 3 V9 50KB P2 1 2 12N C26 100P 7 C24

non shorting switch! Power on / bypass OUTPUT J2

1

3 2 1 V+ 9 8 6 V-

22N VR21 2K2 R10 33K C17 100P R22 100

2

E J8004

MID
3

1 P3 V9 30KB

D

R17 22K

R19 1K V+ 1 3 4 4558S R18 100K U2A 5 2 2.2 C20

4558S C22 39N R20 8K2 U2B 2 C23 22N R23 10K 6 4

5

SW1B SK22F02 C25 3.3

D

VV-

3 P4 V9 50KB

1

V-

C 4148 Power on / bypass non shorting switch! V+ V+ V+ V+

D2

R41 5K1

BASS

R24 100K V-

C

R47 1K5

D1 REDLED VB

2

B SW1A SK22F02 3

2

V+ C201 220 R201 15K R43 82K R44 100K C6 1 7 R45 200K 6 U1B 4558S R46 2M2 8

D201

(c) Copyright 1997 - ALL RIGHTS RESERVED
All unspecified capacitors in uF, resistors carbon 5%

9

4001 J3 5 4 1 A J7001 EXTERNAL POWER SUPPLY pow

1REHOV(OHFWURQLFV
Barnerstrasse 42, 22765 Hamburg, Germany
http://wwww.nobels.com - email: [email protected]
Title Number: Date:

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1

R202 15K

C202 220

CIRCUIT DIAGRAM PREAMP + EQ / PRE-C Time: 27-Jan-2000 18:56:51
R:\$PRO\CMPCT\PRE-C\DSGN\PREC_2A.SCH 5

V-

V-

V-

VVV-

Size: A5 Sheet 1
6

Rev: 2 of

A

1

File: 4

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