Akashic Guitar effects PCB lookup
GAINSAGRPD

1590B · 3 knobs

PCB Guitar Mania

Grizzly Fuzz

Based on the KMA Fuzzly Bear· 1 other board clones it

Category
Fuzz· Silicon Fuzz Monster
Controls
Gain · Sag · Rpd
Difficulty
Easy
Price
€9.90out of stock
Tags
beginner

Heads up Builders widely report inconsistent quality from PCB Guitar Mania boards, and whether a given board works is a gamble. Read recent forum reports before ordering.

From the vendor

Project overview

High saturated simple silicon fuzz that will blow you away. Features Sag pot to achieve that dying battery sound and an add-on toggle switch for selecting between the stock didoes, no diodes, and a free slot to choose with any alternative you want, germanium, schotky, LEDs, or any other diode you feel to experiment with.

Introduction

The KMA audio machines fuzzy bear is a great sounding, highly saturated, and simple to build Fuzz pedal that’s based on the Jordan Bosston, a black little unit that got plugged straight into your guitar, and the original effect is an absolute must-have for Pedal builders size ages. People sworn by the sound of it with an almost empty battery. So KMA decided to add this feature as an external Sag control (dying fuzz knob) that allows you to get this sound whenever you like by reducing the transistor’s voltage. Well…. there was not much to do for us anymore except adding a diode clipping switch that allows you to lift the diodes (still very fuzzy), use stock or use some even harder clipping germanium diodes.

Controls

• Gain

• Sag

• Volume

For further analysis on this circuit take a look at this thread on Free Stomp Boxes Forum.

For any technical questions regarding this build don’t forget to check out our Facebook Group and our forum at Free Stomp Boxes.

Grizzly Fuzz 1.0v – Building Docs (13/10/2022)

Grizzly Fuzz 1.0v – Building Docs (07/06/2019)

Grizzly Fuzz – 125b Drilling Template

Grizzly Fuzz – 1590b Drilling Template

Schematic

The schematic is in the vendor's build document, page 7. Open the build document. No KiCad fragment has been drawn for this circuit yet.

Parts list 24 rows

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RefValueNormalizedTypeNotes
Resistors 6
R04K74.7k
R1150K150k
R2560K560k
R3560K560k
R418K18k
R52K22.2k
Capacitors 6
C1330n330n
C222n22n
C347p47p
C468n68n
C5100n100n
C647u47u
Diodes 7
D11N40011N4001
D41N41481N4148
D51N41481N4148
D61n34A*1N34A
D71n34A*1N34A
D81n34A*1N34A
D91n34A*1N34A
Transistors 2
Q1BC109C**BC109C
Q22N39062N3906
Potentiometers 3
GAINB500KB500kPotentiometer
SAGB50KB50kPotentiometer
RPD1M1MPotentiometer

Other boards based on the KMA Fuzzly Bear