Enclosure not stated · 2 knobs
MicTester's 1969 Fuzz BoxVerified
Based on the MicTester 1969 Fuzz Box
From the post
Her's a unique fuzz circuit from MicTester for your #FuzzFriday. Here's what he had to say about it:
Way back in 1969, I heard "Inna Gadda Da Vida" for the first time. I realized quickly after building some simple transistor stages that didn't work properly that "the" sound was coming from abused transistors! Experimentation over some weeks led to [this circuit]! Just two pots give an amazing range of distorted sounds and none of the components are critical.
Please tweak away until you find the sound you want! Alter capacitors, change the transistors–experiment!
The original FSB thread with the schematic can be found here.
Schematic
This is a board layout, a drawing of where each part goes, and the post may link the schematic it was drawn from. Open the layout at Effects Layouts (blog). No KiCad fragment has been drawn for this circuit yet.
Parts list 15 rows
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| Ref | Value | Normalized | Type | Notes |
|---|---|---|---|---|
| Resistors 7 | ||||
| ×2 | 390K | 390k | read from the layout by eye | |
| ×1 | 10K | 10k | read from the layout by eye | |
| ×4 | 1K | 1k | read from the layout by eye | |
| ×3 | 22K | 22k | read from the layout by eye | |
| ×1 | 4.7K | 4.7k | read from the layout by eye | |
| ×1 | 1.5M | 1.5M | read from the layout by eye | |
| ×1 | 2.2M | 2.2M | read from the layout by eye | |
| Capacitors 3 | ||||
| ×2 | 47nF | 47n | read from the layout by eye | |
| ×3 | 100nF | 100n | read from the layout by eye | |
| ×1 | 47uF | 47u | electrolytic; read from the layout by eye | |
| Diodes 2 | ||||
| ×2 | 1N4148 | 1N4148 | read from the layout by eye | |
| ×1 | 1N4001 | 1N4001 | read from the layout by eye | |
| Transistors 1 | ||||
| ×2 | BC109C | BC109C | Q1-2: BC109C, BC549C, etc.; read from the layout by eye | |
| Potentiometers 2 | ||||
| Fuzz | B1M | B1M | Potentiometer | read from the layout by eye |
| Level | A50K | A50k | Potentiometer | read from the layout by eye |