Enclosure not stated · 8 knobs
Bipolar Bear - Dual OverdriveVerified
Based on the Bipolar Bear Dual Overdrive
- Category
- Distortion
- Controls
- N. Volume · S. Volume · S. Gain · S. Mids · S. Tone · N. Tone · N. Mids · N. Gain
- Difficulty
- Difficult
- Build
- Vero· 33×23· 70 cuts, 33 links
- Layout
- Verified · Tagboard Effects marks it as built and working
- Tags
- Bipolar Bear, Distortion, Overdrive, Rolo
From the post
Here is another great project by David Rolo.
You can find all infos here.
14/02/2016 All layouts re-drawn and updated due to schematic errors.
Big thanks to Michael Oriente for fixing this project!
(Check commects to easily fix previous layouts)
Original Video:
You can use Mark's Dual Offboard Wiring for this project.
... and the separated circuits
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 49 rows
Report a wrong parseGot parts in a drawer? See what you can build with them.
Check before you build · 4 values the reader of this layout was not sure of
- 2n ceramic left of the 2134 IC (about column 8, row 14): printed '2n', may be a truncated 2n2
- S. Tone B50K: legend name; the board wires are labelled S. Treble 1-3, assumed the same pot
- Which two of the seven transistors are 2N7000: taken from the labels above the board (the DGS and SGD outlines left of centre); the other five are J201
- IC printed '1044' (charge pump, MAX1044/TC1044 family) and '4558': kept as printed
| Ref | Value | Normalized | Type | Notes |
|---|---|---|---|---|
| Resistors 15 | ||||
| ×3 | 33K | 33k | read from the layout by eye | |
| ×5 | 1M | 1M | read from the layout by eye | |
| ×3 | 470K | 470k | read from the layout by eye | |
| ×3 | 1K | 1k | read from the layout by eye | |
| ×1 | 560R | 560 | read from the layout by eye | |
| ×1 | 4K7 | 4.7k | read from the layout by eye | |
| ×4 | 47K | 47k | read from the layout by eye | |
| ×1 | 100R | 100 | read from the layout by eye | |
| ×3 | 22K | 22k | read from the layout by eye | |
| ×6 | 10K | 10k | read from the layout by eye | |
| ×2 | 330R | 330 | read from the layout by eye | |
| ×1 | 15K | 15k | read from the layout by eye | |
| ×1 | 470R | 470 | read from the layout by eye | |
| ×1 | 3K3 | 3.3k | read from the layout by eye | |
| ×1 | 120R | 120 | read from the layout by eye | |
| Capacitors 18 | ||||
| ×6 | 100n | 100n | read from the layout by eye | |
| ×2 | 1n | 1n | read from the layout by eye | |
| ×4 | 470p | 470p | read from the layout by eye | |
| ×1 | 150p | 150p | read from the layout by eye | |
| ×2 | 560p | 560p | read from the layout by eye | |
| ×1 | 2n | 2n | read from the layout by eye | |
| ×2 | 2n2 | 2.2n | read from the layout by eye | |
| ×3 | 10n | 10n | read from the layout by eye | |
| ×1 | 15n | 15n | read from the layout by eye | |
| ×1 | 22n | 22n | read from the layout by eye | |
| ×2 | 47n | 47n | read from the layout by eye | |
| ×1 | 330n | 330n | read from the layout by eye | |
| ×1 | 470n | 470n | read from the layout by eye | |
| ×1 | 680n | 680n | read from the layout by eye | |
| ×3 | 1u | 1u | film; read from the layout by eye | |
| ×2 | 1u | 1u | electrolytic; read from the layout by eye | |
| ×2 | 47u | 47u | electrolytic; read from the layout by eye | |
| ×3 | 100u | 100u | electrolytic; read from the layout by eye | |
| Diodes 3 | ||||
| ×2 | Ge | GE | D1, D2, legend: Ge Diodes; read from the layout by eye | |
| D3 | 9.1V Zener | 9V1 | read from the layout by eye | |
| D4 | 1N4001 | 1N4001 | read from the layout by eye | |
| Transistors 2 | ||||
| ×2 | 2N7000 | 2N7000 | MOSFET; read from the layout by eye | |
| ×5 | J201 | J201 | JFET; read from the layout by eye | |
| ICs 3 | ||||
| ×1 | 4558 | 4558 | read from the layout by eye | |
| ×1 | OPA2134 | OPA2134 | printed 2134; read from the layout by eye | |
| ×1 | 1044 | 1044 | charge pump, printed 1044; read from the layout by eye | |
| Potentiometers 8 | ||||
| N. Volume | A100K | A100k | Potentiometer | read from the layout by eye |
| S. Volume | A100K | A100k | Potentiometer | read from the layout by eye |
| S. Gain | B100K | B100k | Potentiometer | dual; read from the layout by eye |
| S. Mids | B20K | B20k | Potentiometer | read from the layout by eye |
| S. Tone | B50K | B50k | Potentiometer | wired as S. Treble 1-3; read from the layout by eye |
| N. Tone | B100K | B100k | Potentiometer | read from the layout by eye |
| N. Mids | B250K | B250k | Potentiometer | read from the layout by eye |
| N. Gain | A500K | A500k | Potentiometer | read from the layout by eye |