Klon Buffer

The Klon Buffer is one of the most popular guitar buffers. This simple and effective circuit restores the high frequencies lost through long cables or large pedal chains.

Steps

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Designators and components Step 2 of 4

COMPONENT LIST

PCB
PCB KLON BUFFER DIY PCB GUITAR EFFECT

Capacitors
C1   220n   220NF 0.22UF 100V 5% POLYESTER FILM BOX TYPE CAPACITOR
C2   47u 47UF 50V 105C RADIAL ELECTROLYTIC CAPACITOR 6X11MM
C3 1u 1UF 100V 5% POLYESTER FILM BOX TYPE CAPACITOR

Diode
D1 LED LED 3MM RED

IC
OPAMP TL071 TL071 OPERATIONAL AMPLIFIER

Resistors
R1   100k 100K OHM 1/4W 1% METAL FILM RESISTOR
R2   100k   100K OHM 1/4W 1% METAL FILM RESISTOR
R3 1M 1M OHM 1/4W 1% METAL FILM RESISTOR
R4   100k   100K OHM 1/4W 1% METAL FILM RESISTOR
R5 560   560 OHM 1/4W 1% METAL FILM RESISTOR
R6   3.3k 3.3K OHM 1/4W 1% METAL FILM RESISTOR

PCB

CIRCUIT

GENERAL DESCRIPTION OF COMPONENTS

Resistors

Resistors don't have polarity, so you can place them in any direction. Determine their resistance value by using a multimeter or by reading the color bands.

Electrolytic capacitors

Electrolytic capacitors have their value and maximum voltage rating printed on the body. The negative pin is indicated by a white stripe along the can, and it also has a shorter leg. The longer leg is positive. Never exceed the maximum voltage rating. Ensure the capacitor's voltage rating is at least double that of your power supply (e.g., use an 18V capacitor for a 9V power supply).

Polyester capacitors

Polyester capacitors don't have polarity and can be placed in any direction. Their value is marked using a three-number code. The first two numbers represent the first and second digits of the value, and the third number is the multiplier code (read in picofarads, pF).

Integrated Circuits

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

Led diodes

LEDs (Light Emitting Diodes) have polarity. The cathode is indicated by a flat edge on the side of the LED's plastic casing and a shorter leg. The longer leg is the anode. On the PCB, the cathode is marked with a flat side and the anode with a round side.