Enclosure not stated · 3 knobs
Electro Harmonix / Sovtek Russian Big MuffVerified
Based on the Electro-Harmonix Sovtek Russian Big Muff
- Category
- Distortion
- Build
- Vero· 19×17· 17 cuts, 5 links
- Layout
- Verified · Dirtbox Layouts marks it as built and working
- Tags
- Big Muff, Distortion, Electro Harmonix, Fuzz, MOJO, USSR
From the post
Requested MOJO layout.
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 Dirtbox Layouts. No KiCad fragment has been drawn for this circuit yet.
Parts list 32 rows
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| Ref | Value | Normalized | Type | Notes |
|---|---|---|---|---|
| Resistors 11 | ||||
| ×4 | 470K | 470k | read from the layout by eye | |
| ×4 | 100K | 100k | read from the layout by eye | |
| ×3 | 10K | 10k | read from the layout by eye | |
| ×3 | 12K | 12k | read from the layout by eye | |
| ×3 | 390Ω | 390 | read from the layout by eye | |
| ×1 | 39K | 39k | read from the layout by eye | |
| ×1 | 22K | 22k | read from the layout by eye | |
| ×1 | 20K | 20k | read from the layout by eye | |
| ×1 | 1K | 1k | read from the layout by eye | |
| ×1 | 2.7K | 2.7k | read from the layout by eye | |
| ×1 | 1M | 1M | read from the layout by eye | |
| Capacitors 8 | ||||
| ×6 | 100nF | 100n | read from the layout by eye | |
| ×2 | 47nF | 47n | read from the layout by eye | |
| ×1 | 10nF | 10n | read from the layout by eye | |
| ×1 | 5.6nF | 5.6n | read from the layout by eye | |
| ×1 | 3.9nF | 3.9n | read from the layout by eye | |
| ×3 | 500pF | 500p | legend: sub 430pF for Red Army OD spec; read from the layout by eye | |
| ×1 | 100pF | 100p | read from the layout by eye | |
| ×1 | 100uF | 100u | electrolytic; read from the layout by eye | |
| Diodes 5 | ||||
| D1 | KD521A | KD521A | legend: KD521A, KD521V, KD522B or 2D510A; read from the layout by eye | |
| D2 | KD521A | KD521A | legend: KD521A, KD521V, KD522B or 2D510A; read from the layout by eye | |
| D3 | KD521A | KD521A | legend: KD521A, KD521V, KD522B or 2D510A; read from the layout by eye | |
| D4 | KD521A | KD521A | legend: KD521A, KD521V, KD522B or 2D510A; read from the layout by eye | |
| D5 | 1N5817 | 1N5817 | read from the layout by eye | |
| Transistors 4 | ||||
| Q1 | KT3102E | KT3102E | legend: KT3102E, KT3102EM, BC547C or BC549C; read from the layout by eye | |
| Q2 | KT3102E | KT3102E | legend: KT3102E, KT3102EM, BC547C or BC549C; read from the layout by eye | |
| Q3 | KT3102E | KT3102E | legend: KT3102E, KT3102EM, BC547C or BC549C; read from the layout by eye | |
| Q4 | KT3102E | KT3102E | legend: KT3102E, KT3102EM, BC547C or BC549C; read from the layout by eye | |
| Potentiometers 3 | ||||
| Sustain | B100K | B100k | Potentiometer | 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 |
| Switches 1 | ||||
| Switch | SPST | SPST | wired between Tone 3 and the board (Switch 2); read from the layout by eye | |