1590B · 3 knobs
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
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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
Report a wrong parse| Ref | Value | Normalized | Type | Notes |
|---|---|---|---|---|
| Resistors 6 | ||||
| R0 | 4K7 | 4.7k | ||
| R1 | 150K | 150k | ||
| R2 | 560K | 560k | ||
| R3 | 560K | 560k | ||
| R4 | 18K | 18k | ||
| R5 | 2K2 | 2.2k | ||
| Capacitors 6 | ||||
| C1 | 330n | 330n | ||
| C2 | 22n | 22n | ||
| C3 | 47p | 47p | ||
| C4 | 68n | 68n | ||
| C5 | 100n | 100n | ||
| C6 | 47u | 47u | ||
| Diodes 7 | ||||
| D1 | 1N4001 | 1N4001 | ||
| D4 | 1N4148 | 1N4148 | ||
| D5 | 1N4148 | 1N4148 | ||
| D6 | 1n34A* | 1N34A | ||
| D7 | 1n34A* | 1N34A | ||
| D8 | 1n34A* | 1N34A | ||
| D9 | 1n34A* | 1N34A | ||
| Transistors 2 | ||||
| Q1 | BC109C** | BC109C | ||
| Q2 | 2N3906 | 2N3906 | ||
| Potentiometers 3 | ||||
| GAIN | B500K | B500k | Potentiometer | |
| SAG | B50K | B50k | Potentiometer | |
| RPD | 1M | 1M | Potentiometer | |
Other boards based on the KMA Fuzzly Bear
- Teddy Rupture Fuzz PedalPCB · 125B · $8.00