Box of Rock (3 knobs)

The Box of Rock pedal emulates the JTM45 tone. This project simplifies the original circuit by removing the boost section, fitting in a 1590B enclosure with 3 knobs.

Steps

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Categories

Tayda Electronics Kits, DIY Projects, DIY Guitar Effects

Created by DHEA
Status: Active

Designators and components Step 2 of 5

COMPONENTS

The schematic and designators of this PCB are similar to the ones from DHD2 without the boost section.

PCB
PCB   BOX OF ROCK (3 KNOBS) DIY PCB GUITAR EFFECT
Capacitors
C1 100n     100NF 100V 5% POLYESTER FILM BOX TYPE CAPACITOR
C2 22n     22NF 100V 5% POLYESTER FILM BOX TYPE CAPACITOR
C3 470p 470PF 50V CERAMIC DISC CAPACITOR
C4 22n     22NF 100V 5% POLYESTER FILM BOX TYPE CAPACITOR
C5 1u 1UF 100V 5% POLYESTER FILM BOX TYPE CAPACITOR
C6 10n 10NF 100V 5% POLYESTER FILM BOX TYPE CAPACITOR
C7 22n     22NF 100V 5% POLYESTER FILM BOX TYPE CAPACITOR
C8 1n 1NF 100V 5% POLYESTER FILM BOX TYPE CAPACITOR
C9 1n 1NF 100V 5% POLYESTER FILM BOX TYPE CAPACITOR
C12   47u 47UF 25V ELECTROLYTIC CAPACITOR 5X11MM
C13   1n 1NF 100V 5% POLYESTER FILM BOX TYPE CAPACITOR
C14   1n 1NF 100V 5% POLYESTER FILM BOX TYPE CAPACITOR

Transistors
Q1 BS170 BS170 BS170RLRAG MOSFET N-CHANNEL
Q2 BS170 BS170 BS170RLRAG MOSFET N-CHANNEL
Q3 BS170 BS170 BS170RLRAG MOSFET N-CHANNEL

Resistors
R1 1M   1M OHM 1/4W 1% METAL FILM RESISTOR
R2 1M   1M OHM 1/4W 1% METAL FILM RESISTOR
R3 1M   1M OHM 1/4W 1% METAL FILM RESISTOR
R4 5.1k   5.1K OHM 1/4W 1% METAL FILM RESISTOR
R5 470k 470K OHM 1/4W 1% METAL FILM RESISTOR
R6 1M   1M OHM 1/4W 1% METAL FILM RESISTOR
R7 1M   1M OHM 1/4W 1% METAL FILM RESISTOR
R8 5.1k   5.1K OHM 1/4W 1% METAL FILM RESISTOR
R9 100 100 OHM 1/4W 1% METAL FILM RESISTOR
R10 1M   1M OHM 1/4W 1% METAL FILM RESISTOR
R11   1M   1M OHM 1/4W 1% METAL FILM RESISTOR
R12   5.1k   5.1K OHM 1/4W 1% METAL FILM RESISTOR
R13   330 330 OHM 1/4W 1% METAL FILM RESISTOR
R14   47k 47K OHM 1/4W 1% METAL FILM RESISTOR
R15   82k 82K OHM 1/4W 1% METAL FILM RESISTOR
R16   10k 10K OHM 1/4W 1% METAL FILM RESISTOR
R17   10k 10K OHM 1/4W 1% METAL FILM RESISTOR
R23   82 82 OHM 1/4W 1% METAL FILM RESISTOR

Diodes
D1 1N4739A   1N4739A 1N4739 ZENER DIODE 9.1V 1W
D2 1N4739A   1N4739A 1N4739 ZENER DIODE 9.1V 1W
D3   1N4001   1N4001 DIODE 1A 50V

Potentiometers
VOL 100k-A 100K OHM LOG POTENTIOMETER
TONE 100k-B 100K OHM LINEAR POTENTIOMETER
GAIN 5k-C 5K OHM ANTI-LOG POTENTIOMETER

PCB

SCHEMATIC

TRANSISTORS

2N7000 is a common replacement for BS170, however the pinout is a 180 degrees turn. Mount the transistors on the PCB as follows.