Enclosure not stated · 5 knobs
Smallsound/Bigsound Mini OverdriveVerified
Based on the Smallsound/Bigsound Mini· 3 other boards clone it
From the post
A "Mini" version of Smallsound/Bigsound Fuck Overdrive.
Thanks to Brian for uploading his original schematic!
(You can find original thread and schematic here.)
11/07/16 Layout updated!
Brian has suggested to use J201 for Q2 & Q4 and to add a 10K trimpot between V+ and the Bias pot.
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 Tagboard Effects. No KiCad fragment has been drawn for this circuit yet.
Parts list 24 rows
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Check before you build · 3 values the reader of this layout was not sure of
- The edge label '5457' sits under the right-hand part of the board; taken to be the JFET at upper right (D-S-G, below the 10K trimmer), with the two J201 labels on the top-centre and bottom-centre JFETs
- Transistors labelled only '5089' and '5457'; entered as 2N5089 and 2N5457
- 10K trimmer at top right has no name printed
| Ref | Value | Normalized | Type | Notes |
|---|---|---|---|---|
| Resistors 6 | ||||
| ×6 | 1K | 1k | read from the layout by eye | |
| ×4 | 4K7 | 4.7k | read from the layout by eye | |
| ×2 | 1M | 1M | read from the layout by eye | |
| ×1 | 10R | 10 | read from the layout by eye | |
| ×1 | 47K | 47k | read from the layout by eye | |
| ×1 | 33K | 33k | read from the layout by eye | |
| Capacitors 7 | ||||
| ×1 | 1n | 1n | read from the layout by eye | |
| ×1 | 15n | 15n | read from the layout by eye | |
| ×1 | 100n | 100n | read from the layout by eye | |
| ×1 | 220n | 220n | read from the layout by eye | |
| ×3 | 1u | 1u | film (box); read from the layout by eye | |
| ×3 | 10u | 10u | electrolytic; read from the layout by eye | |
| ×1 | 220u | 220u | electrolytic; read from the layout by eye | |
| Diodes 1 | ||||
| D1 | 1N5817 | 1N5817 | read from the layout by eye | |
| Transistors 3 | ||||
| ×1 | 2N5089 | 2N5089 | printed 5089; read from the layout by eye | |
| ×2 | J201 | J201 | JFET; read from the layout by eye | |
| ×1 | 2N5457 | 2N5457 | JFET, printed 5457; read from the layout by eye | |
| Potentiometers 5 | ||||
| Treble | B10K | B10k | Potentiometer | read from the layout by eye |
| Bias | B10K | B10k | Potentiometer | read from the layout by eye |
| Gain | A100K | A100k | Potentiometer | dual; read from the layout by eye |
| Volume | A100K | A100k | Potentiometer | read from the layout by eye |
| Bass | C500K | C500k | Potentiometer | read from the layout by eye |
| Trimmers 2 | ||||
| ×2 | 50K | 50k | Bias; read from the layout by eye | |
| ×1 | 10K | 10k | unlabelled; read from the layout by eye | |
Other boards based on the Smallsound/Bigsound Mini
- Smallsound/Bigsound Mini Dirtbox Layouts
- Smallsound/Bigsound Mini Effects Layouts (blog)
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