Treble Booster Brian May

This pedal is a classic booster DIY project. You can use it to add treble or to overdrive the amp with a great sound.

Steps

Designators and components Step 2 of 5

PCB DESIGNATORS

Resistors
R1   120k 120k OHM 1/4W 1% METAL FILM RESISTOR
R2   100k 100K OHM 1/4W 1% METAL FILM RESISTOR
R3 1k 1K OHM 1/4W 1% METAL FILM RESISTOR
R4   22k 22K OHM 1/4W 1% METAL FILM RESISTOR
R5   2.4k   2.4K OHM 1/4W 1% METAL FILM RESISTOR
R6   6.8k   6.8K OHM 1/4W 1% METAL FILM RESISTOR
R7 100 100 OHM 1/4W 1% METAL FILM RESISTOR
R8 Jumper

Capacitors
C1   4.7n   4.7NF 100V 5% POLYESTER FILM BOX TYPE CAPACITOR
C2   1n 1NF 100V 5% POLYESTER FILM BOX TYPE CAPACITOR
C3   47n      47NF 100V 5% POLYESTER FILM BOX TYPE CAPACITOR
C4   47u 47UF 25V ELECTROLYTIC CAPACITOR 5X11MM

Transistor
Q1 2N5088 2N5088 GERENAL PURPOSE TRANSISTOR

Potentiometer
VOL 100k-A 100K OHM LOGARITHMIC POTENTIOMETER

PCB (LINK)

PCB SCHEMATIC

The following table shows several projects that you can build with the DH.A8 PCB. Note that some components are jumpers or are not mounted.

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.

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.

Transistors

Transistors are three terminals components and their model is printed on them. To indicate the correct orientation, one side of the transistor is flat and the other one is round.

Potentiometers

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