Purple Plexi 800

The Purple Plexi is a powerful distortion pedal with plexi-style amps tone. It is very dynamic and touch-sensitive distortion, perfect for rock music.
Steps

Created by DHEA
Status: Active
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Designators and components Step 2 of 4

PCB DESIGNATORS

Capacitors        
C1    390p    390PF 50V CERAMIC DISC CAPACITOR
C2    4.7n    4.7NF 0.0047UF 100V 5% POLYESTER FILM BOX TYPE CAPACITOR
C3    100n    100NF 0.1UF 100V 5% POLYESTER FILM BOX TYPE CAPACITOR
C4    47u    47UF 50V 105C RADIAL ELECTROLYTIC CAPACITOR 6X11MM
C5    47u    47UF 50V 105C RADIAL ELECTROLYTIC CAPACITOR 6X11MM
C6    4.7n    4.7NF 0.0047UF 100V 5% POLYESTER FILM BOX TYPE CAPACITOR
C7    100n    100NF 0.1UF 100V 5% POLYESTER FILM BOX TYPE CAPACITOR
IC        
IC1    LM386    LM386 LM386N AUDIO AMPLIFIER IC
Resistors        
R1    2.2M    2.2M OHM 1/4W 1% METAL FILM RESISTOR
R2    10    10 OHM 1/4W 1% METAL FILM RESISTOR
R3    10    10 OHM 1/4W 1% METAL FILM RESISTOR
R4    470    470 OHM 1/4W 1% METAL FILM RESISTOR
R5    4.7k    4.7K OHM 1/4W 1% METAL FILM RESISTOR
R6    1.8k    1.8k OHM 1/4W 1% METAL FILM RESISTOR
R7    4.7k    4.7K OHM 1/4W 1% METAL FILM RESISTOR
R8    330    330 OHM 1/4W 1% METAL FILM RESISTOR
Potentiometers        
VOL    100k-B    100K OHM LINEAR TAPER POTENTIOMETER
FREQ    5k-B    5K OHM LINEAR TAPER POTENTIOMETER
GAIN    1K-B    1K OHM LINEAR TAPER POTENTIOMETER

 

GENERAL DESCRIPTION OF COMPONENTS

Resistors

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
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 +.

Polyester capacitors
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.

Ceramic capacitors

The ceramic 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

 

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
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
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.

 

Potentiometer
Potentiometers can be mounted directly on the PCB. For a correct orientation, the potentiometer shaft is marked on the PCB.