Akashic Guitar effects circuit lookup
TONELEVELGAINDEPTH

125B · 4 knobs

PCB Guitar Mania

Bulgarian Fuzz

Based on the Bulgarian schematic

Category
Fuzz· Vintage germanium fuzz
Controls
Tone · Level · Gain · Depth
Difficulty
Easy
Price
€9.90out of stock
Tags
soviet

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

Originally from a Bulgarian electronics magazine from the 80s and never produced as far as we know. This circuit needed a lot of rework and experimentation. The end result: a great touch sensitive unique mellow-sounding Germanium fuzz.

Introduction

Looking for something different in a fuzz pedal? Check out the Bulgarian Fuzz – it’s only available at our store!

The original schematic comes from a Bulgarian electronics magazine from the 80s, and there is no record of a pedal after it.

We had to do some deep work over the original source—Readapting and modernizing the schematic without losing the soul of its roots took us some fair struggle, but it was worth it! The final result is a distinctive two-mode old-school germanium fuzz with harmonics compensation.

With its unique tone, this pedal is sure to stand out from the crowd. If you’re looking for something vintage and special, Bulgarian Fuzz is the perfect build for you.

Controls

Potentiometers

• Depth

• Level

• Tone

• Gain

Switches

• Compensation

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

Bulgarian Fuzz 1v2 – Building Docs

Bulgarian Fuzz 1v1 – Building Docs

Bulgarian Fuzz – Drilling template

Schematic

The schematic is in the vendor's build document, page 5. Open the build document. No KiCad fragment has been drawn for this circuit yet.

Parts list 34 rows

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RefValueNormalizedTypeNotes
Resistors 13
R6100k100k
R12100r100
R110M10M
R510k10k
R91M1M
R727k27k
R102M2M
R112M2M
R13470k470k
R4560r560
R268k68k
R86k86.8k
R382k82k
Capacitors 10
C9100p100p
C10100p100p
C11100p100p
C7150n150n
C41n1n
C1220n220n
C2220n220n
C5220n220n
C639n39n
C8470n470n
Diodes 2
D21N41481N4148
D11N58191N5819
Transistors 3
Q1NPN Germanium*NPN GERMANIUM
Q2NPN Germanium*NPN GERMANIUM
Q3NPN Germanium*NPN GERMANIUM
Potentiometers 4
TONEA25kA25k
LEVELA50kA50k
GAINB1MB1M
DEPTHB25kB25k
Switches 1
COMPENSATIONSPDT On/OnSPDT ON/ON
LEDs 1
LED3mm red LED3MM RED LED