Tubescreamer

The Tubescreamer is probably the most built overdrive pedal in the DIY community. The pedal has a characteristic mid-boosted tone perfect for soft rock and blues.

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Designators and components Step 2 of 5

COMPONENT LIST (for TS808)

PCB
PCB Tubescreamer PCB

Capacitors
C1 22n   22NF 0.022UF 100V 5% POLYESTER FILM BOX TYPE CAPACITOR
C2 1u   1UF 100V 5% POLYESTER FILM BOX TYPE CAPACITOR
C3 47n   47NF 0.047UF 100V 5% POLYESTER FILM BOX TYPE CAPACITOR
C4 50p   50PF 50V CERAMIC DISC CAPACITOR
C5 220n   220NF 0.22UF 100V 5% POLYESTER FILM BOX TYPE CAPACITOR
C6 220n   220NF 0.22UF 100V 5% POLYESTER FILM BOX TYPE CAPACITOR
C7 1u   1UF 100V 5% POLYESTER FILM BOX TYPE CAPACITOR
C8 100n   100NF 0.1UF 100V 5% POLYESTER FILM BOX TYPE CAPACITOR
C9 10u   10UF 50V 105C RADIAL ELECTROLYTIC CAPACITOR 5X11MM
C10 100u   100UF 35V 105C RADIAL ELECTROLYTIC CAPACITOR 6X11MM
C11 47u 47UF 50V 105C RADIAL ELECTROLYTIC CAPACITOR 6X11MM

Diodes
D1 1N4148   1N4148 SWITCHING SIGNAL DIODE
D2 1N4148   1N4148 SWITCHING SIGNAL DIODE
D3 1N4001   1N4001 DIODE 1A 50V

IC
IC1 NJM4558 NJM4558D DUAL OPERATIONAL AMPLIFIER
(Socket SOCKET IC 8 PIN)

Transistors
Q1   2N3904   2N3904 NPN GENERAL PURPOSE TRANSISTOR
Q2   2N3904   2N3904 NPN GENERAL PURPOSE TRANSISTOR

Potentiometers
GAIN 500k-A   500K OHM LOGARITHMIC TAPER POTENTIOMETER
TONE   20k-W 20K OHM W-TAPER W20K TONE CONTROL POTENTIOMETER
VOL 100k-A   100K OHM LOGARITHMIC TAPER POTENTIOMETER

PCB

PCB SCHEMATIC

MODIFICATIONS

TS9

Replace the following components to build the TS9 version

C11 4.7u 4.7UF 35V 105C RADIAL ELECTROLYTIC CAPACITOR 5X11MM
R15 470 470 OHM 1/4W 1% METAL FILM RESISTOR
R16 100k 100K OHM 1/4W 1% METAL FILM RESISTOR

OP Amp

Use an 8-pin socket and replace different operational amplifiers: LM833, OP275, TL072, NE5532...

Diodes

You can obtain different types of distortion by changing the diodes. The germanium diodes (1N60, 1N270 or 1N34A) will produce softer distortion, the silicon (1N914 or 1N4148) harder and the leds more fuzz and crunch. You can also experiment with different combinations (symmetric o asymmetric).

GENERAL DESCRIPTION OF COMPONENTS

Resistors

Use a multimeter or the color bands to obtain the resistance value. Resistors do not have polarity, you can place them in any direction.

Electrolytic capacitors

Electrolytic capacitors have their value printed on them. The negative polarity pin is indicated by a white strip along the can. They also have a longer leg indicating the positive pin. The maximum voltage rating never can be exceeded, make sure you are using at least double voltage rating than your power supply. For example, if you are using a 9V power supply, use a electrolytic capacitor with at least 18V maximum voltage rating.

Polyester capacitors

Polyester capacitors have their value marked with three numbers. Read as picofarads (pF), the first two are the 1st and 2nd digits and the third is the multiplier code. These capacitors do not have polarity, you can place them in any direction.

Ceramic capacitors

Ceramic capacitors have their value marked with three numbers. Read as picofarads (pF), the first two are the 1st and 2nd digits and the third is the multiplier code. These capacitors do not have polarity, you can assemble them in any direction.

Integrated Circuits

Integrated Circuits (ICs) have their model printed on them. A notch half-circle or a dot indicates the correct position on the PCB.

Diodes

Diodes have their model printed on them. The polarity (cathode) is indicated by the ring near the side. This ring is also marked on the PCB.

Led diodes

Led diodes have polarity, the cathode is indicated as a flat surface on the side of the diode and also it is the shorter led. On the PCB, the cathode is marked as a flat side and anode as a round side.

Potentiometers

Potentiometers have their resistance value marked on them. They are marked with A, B or C for logarithmic, linear and reverse logarithmic, respectively.