Enclosure not stated · 3 knobs
Mad Professor Fire Red FuzzVerified
Based on the Mad Professor Fire Red Fuzz· 3 other boards clone it
From the post
Here's Bjorn's take on the classic Big Muff circuit. JFETs are used as clippers in the first clipping stage, and a JFET-based gain recovery stage is used instead of the traditional BJT one found in the original. You can use board mount pots from the solder side using right angle PCB mount pots.
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 34 rows
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Check before you build · 2 values the reader of this layout was not sure of
- Two clipping diodes left of centre (rows J-K): 4148 on the populated board but 4007 on the wiring diagram; entered as 1N4148 from the board
- 14.7K in the group of four resistors right of centre (rows G-J): printed clearly on both views, unusual value
| Ref | Value | Normalized | Type | Notes |
|---|---|---|---|---|
| Resistors 15 | ||||
| ×3 | 100Ω | 100 | read from the layout by eye | |
| ×1 | 150Ω | 150 | read from the layout by eye | |
| ×1 | 470Ω | 470 | read from the layout by eye | |
| ×1 | 2K | 2k | read from the layout by eye | |
| ×1 | 6.8K | 6.8k | read from the layout by eye | |
| ×2 | 8.2K | 8.2k | read from the layout by eye | |
| ×1 | 10K | 10k | read from the layout by eye | |
| ×1 | 14.7K | 14.7k | read from the layout by eye | |
| ×2 | 15K | 15k | read from the layout by eye | |
| ×2 | 22K | 22k | read from the layout by eye | |
| ×1 | 33K | 33k | read from the layout by eye | |
| ×1 | 68K | 68k | read from the layout by eye | |
| ×3 | 100K | 100k | read from the layout by eye | |
| ×3 | 470K | 470k | read from the layout by eye | |
| ×1 | 1M | 1M | read from the layout by eye | |
| Capacitors 8 | ||||
| ×1 | 470pF | 470p | read from the layout by eye | |
| ×1 | 3.9nF | 3.9n | read from the layout by eye | |
| ×1 | 10nF | 10n | read from the layout by eye | |
| ×4 | 100nF | 100n | read from the layout by eye | |
| ×1 | 220nF | 220n | read from the layout by eye | |
| ×3 | 1uF | 1u | electrolytic; read from the layout by eye | |
| ×1 | 10uF | 10u | electrolytic; read from the layout by eye | |
| ×1 | 100uF | 100u | electrolytic; read from the layout by eye | |
| Diodes 2 | ||||
| ×2 | 1N4148 | 1N4148 | printed 4148 on the board; the wiring diagram prints 4007; read from the layout by eye | |
| ×1 | 1N4007 | 1N4007 | printed 4007, on the +9v line; read from the layout by eye | |
| Transistors 6 | ||||
| Q1 | BC550C | BC550C | read from the layout by eye | |
| Q2 | BC550C | BC550C | read from the layout by eye | |
| Q3 | BC550C | BC550C | read from the layout by eye | |
| Q4 | 2N5485 | 2N5485 | JFET; read from the layout by eye | |
| Q5 | 2N3819 | 2N3819 | JFET; read from the layout by eye | |
| Q6 | 2N3819 | 2N3819 | JFET; read from the layout by eye | |
| Potentiometers 3 | ||||
| Drive | A100K | A100k | Potentiometer | board lugs labelled Sustain; read from the layout by eye |
| Tone | B100K | B100k | Potentiometer | read from the layout by eye |
| Volume | B100K | B100k | Potentiometer | read from the layout by eye |
Other boards based on the Mad Professor Fire Red Fuzz
- Mad Professor Fire Red Fuzz Dirtbox Layouts
- Mad Professor Fire Red Fuzz Revolution Deux
- Mad Professor Fire Red Fuzz Tagboard Effects