TubescreamerThe 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. Also, for rock and metal, it can be used before the lead channel of amplifier to make distor
Designators and components Step 2 of 5
COMPONENT LIST (for TS808)
1 x Tubescreamer PCB
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
D1 1N4148 1N4148 SWITCHING SIGNAL DIODE
D2 1N4148 1N4148 SWITCHING SIGNAL DIODE
D3 1N4001 1N4001 DIODE 1A 50V
OPAMP 2134 OPA2134PA OPA2134 2134 HI-PERF OP-AMP IC
Q1 2N3904 2N3904 NPN GENERAL PURPOSE TRANSISTOR
Q2 2N3904 2N3904 NPN GENERAL PURPOSE TRANSISTOR
R1 1M 1M OHM 1/4W 1% METAL FILM RESISTOR
R2 1k 1K OHM 1/4W 1% METAL FILM RESISTOR
R3 510k 510K OHM 1/4W 1% METAL FILM RESISTOR
R4 10k 10K OHM 1/4W 1% METAL FILM RESISTOR
R5 10k 10K OHM 1/4W 1% METAL FILM RESISTOR
R6 4.7k 4.7K OHM 1/4W 1% METAL FILM RESISTOR
R7 51k 51K OHM 1/8W 1% METAL FILM RESISTOR
R8 1k 1K OHM 1/4W 1% METAL FILM RESISTOR
R9 10k 10K OHM 1/4W 1% METAL FILM RESISTOR
R10 220 220 OHM 1/4W 1% METAL FILM RESISTOR
R11 1k 1K OHM 1/4W 1% METAL FILM RESISTOR
R12 1k 1K OHM 1/4W 1% METAL FILM RESISTOR
R13 510k 510K OHM 1/4W 1% METAL FILM RESISTOR
R14 10k 10K OHM 1/4W 1% METAL FILM RESISTOR
R15 100 100 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
R18 10k 10K OHM 1/4W 1% METAL FILM RESISTOR
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
MODIFICATIONS AND EXPERIMENTATION
To build the TS9 version just replace the original components
You can use many types of operational amplifiers. There are plenty of information and disccussion about the sound from different operational amplifiers on the internet. You can try for example:
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).
For more information about diode modifications please take a look to www.diystompboxes.com/cnews/mods.html
GENERAL DESCRIPTION OF COMPONENTS
The resistors are ¼ Watt metal type. You can either use a multimeter or the color bands to obtain their values. Resistors don’t have polarity; you can assemble them in any direction.
Electrolytic capacitors have the value printed on them. The polarity is also is marked for the negative lead, additionally the longer leg is the positive and shorter the negative. Assemble the electrolytic capacitor according with the positive polarity (+) marked in the PCB, that is, the longer leg of the capacitor is passed through the pad marked with +.
The polyester capacitors have three numbers, read as picofarads (pF), the first two are the 1st and 2nd digits and the third is the multiplier code. This type of capacitors doesn’t have polarity; you can assemble them in any direction.
Diodes have their type number marked on them. This two terminals component has polarity; a ring near the side indicates the cathode. This ring is marked as a line to indicate the correct polarity in the PCB.
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.
Integrated Circuits have their name and model printed on them. A notch half-circle or a dot indicates the correct position that the IC needs to be assembled on the PCB.
Potentiometers can be mounted directly on the PCB. For a correct orientation, the potentiometer shaft is marked on the PCB.
Transistors are three terminals components and their model and name are printed on them. To indicate the correct assembling position one side of the transistor is flat and the other one is round, in the same way, the PCB is marked with round and flat side.