OD Eleven

The OD Eleven provides a classic transparent overdrive perfect to drive a tube amplifier.
Steps

Created by DHEA
Status: Active
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Designators and components Step 2 of 5

COMPONENTS

PCB        OD ELEVEN OVERDRIVE DIY PCB GUITAR EFFECT

Capacitors
C1    47n       47NF 100V 5% POLYESTER FILM BOX TYPE CAPACITOR
C2    100p     100PF 50V CERAMIC DISC CAPACITOR
C3    33n       33NF 100V 5% POLYESTER FILM BOX TYPE CAPACITOR
C4    1u         1UF 100V 5% POLYESTER FILM BOX TYPE CAPACITOR
C5    47n       47NF 100V 5% POLYESTER FILM BOX TYPE CAPACITOR
C6    1u         1UF 100V 5% POLYESTER FILM BOX TYPE CAPACITOR
C7    100u     100UF 35V ELECTROLYTIC CAPACITOR 6X11MM
C8    47u       47UF 25V ELECTROLYTIC CAPACITOR 5X11MM
C9    Not mounted

IC
IC1    NJM4558        NJM4558D IC DUAL OPERATIONAL AMPLIFIER
IC Socket        8PIN IC DIP SOCKET

Diodes
D1    1N4148      1N4148 SWITCHING SIGNAL DIODE
D2    1N4148      1N4148 SWITCHING SIGNAL DIODE
D3    1N4148      1N4148 SWITCHING SIGNAL DIODE
D4    1N4148      1N4148 SWITCHING SIGNAL DIODE
D5    Not mounted
D6    Not mounted
D7    Not mounted
D8    1N4001      1N4001 DIODE 1A 50V

Resistors
R1     1M        1M OHM 1/4W 1% METAL FILM RESISTOR
R2     1M        1M OHM 1/4W 1% METAL FILM RESISTOR
R3     3.3k      3.3K OHM 1/4W 1% METAL FILM RESISTOR
R4     3.3k      3.3K OHM 1/4W 1% METAL FILM RESISTOR
R5     1.5k      1.5K OHM 1/4W 1% METAL FILM RESISTOR
R6     3.3k      3.3K OHM 1/4W 1% METAL FILM RESISTOR
R7     3.3k      3.3K OHM 1/4W 1% METAL FILM RESISTOR
R8     8.2k       8.2K OHM 1/4W 1% METAL FILM RESISTOR
R9     10k       10K OHM 1/4W 1% METAL FILM RESISTOR

Switches
S1        Not mounted
S2        Not mounted

Potentiometers
GAIN    500K-B    500K OHM LIN POTENTIOMETER
VOL      10k-B      10K OHM LIN POTENTIOMETER
TONE    5k-B        5K OHM LIN POTENTIOMETER
BASS    50k-B      50K OHM LIN POTENTIOMETER

 

SCHEMATIC

 

PCB   

 

MODS

Increase the potentimeter resistance to increase the gain.

GAIN     1M-B    1M OHM LIN POTENTIOMETER