Enclosure not stated · 4 knobs
MXR El Grande Bass FuzzVerified
Based on the MXR El Grande Bass Fuzz
From the post
Per request. Note that there is an option to choose between internal trim pot (as in original) or external potoentiometer for the Freq control. Freq switch is external and the MPQ3904 transistor array is replaced with ordinary 2N3904s. Schematic is avaiable 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 Dirtbox Layouts. No KiCad fragment has been drawn for this circuit yet.
Parts list 40 rows
Report a wrong parseGot parts in a drawer? See what you can build with them.
| Ref | Value | Normalized | Type | Notes |
|---|---|---|---|---|
| Resistors 20 | ||||
| ×6 | 100K | 100k | read from the layout by eye | |
| ×4 | 470K | 470k | read from the layout by eye | |
| ×3 | 330Ω | 330 | read from the layout by eye | |
| ×3 | 12K | 12k | read from the layout by eye | |
| ×2 | 8.2K | 8.2k | read from the layout by eye | |
| ×2 | 10K | 10k | read from the layout by eye | |
| ×2 | 15K | 15k | read from the layout by eye | |
| ×2 | 39K | 39k | read from the layout by eye | |
| ×1 | 2.2M | 2.2M | read from the layout by eye | |
| ×1 | 33K | 33k | read from the layout by eye | |
| ×1 | 1K | 1k | read from the layout by eye | |
| ×1 | 82K | 82k | read from the layout by eye | |
| ×1 | 130K | 130k | read from the layout by eye | |
| ×1 | 2.7K | 2.7k | read from the layout by eye | |
| ×1 | 100Ω | 100 | read from the layout by eye | |
| ×1 | 820K | 820k | read from the layout by eye | |
| ×1 | 510K | 510k | read from the layout by eye | |
| ×1 | 2.4K | 2.4k | read from the layout by eye | |
| ×1 | 180K | 180k | read from the layout by eye | |
| ×2 | ? | ? | LED resistor, value not given; read from the layout by eye | |
| Capacitors 8 | ||||
| ×9 | 100nF | 100n | read from the layout by eye | |
| ×3 | 470pF | 470p | read from the layout by eye | |
| ×1 | 3.9nF | 3.9n | read from the layout by eye | |
| ×1 | 4.7nF | 4.7n | read from the layout by eye | |
| ×1 | 10nF | 10n | read from the layout by eye | |
| ×1 | 220nF | 220n | read from the layout by eye | |
| ×5 | 1uF | 1u | electrolytic; read from the layout by eye | |
| ×1 | 100uF | 100u | electrolytic; read from the layout by eye | |
| Diodes 1 | ||||
| ×5 | 1N4148 | 1N4148 | D1-D5; read from the layout by eye | |
| Transistors 3 | ||||
| ×5 | 2N5088 | 2N5088 | Q1, Q3, Q5, Q7, Q9; read from the layout by eye | |
| ×4 | 2N3904 | 2N3904 | Q2, Q4, Q6, Q8; read from the layout by eye | |
| Q10 | 2N5087 | 2N5087 | PNP; read from the layout by eye | |
| ICs 1 | ||||
| IC1 | TL062 | TL062 | read from the layout by eye | |
| Potentiometers 4 | ||||
| Tone | A100K | A100k | Potentiometer | read from the layout by eye |
| Fuzz | B100K | B100k | Potentiometer | read from the layout by eye |
| Level | B100K | B100k | Potentiometer | read from the layout by eye |
| Freq | B100K | B100k | Potentiometer | optional, replaces the Freq trimmer; read from the layout by eye |
| Trimmers 1 | ||||
| Freq | 100K | 100k | omit if using the external Freq pot; read from the layout by eye | |
| Switches 2 | ||||
| Sub Sw | DPDT on/on | DPDT ON/ON | toggle; read from the layout by eye | |
| Freq Sw | SPDT on/on | SPDT ON/ON | toggle; read from the layout by eye | |