1590B · 3 knobs
Cerulean (Legacy)
Based on the Marshall Bluesbreaker· 5 other boards clone it
- Category
- Overdrive
- Controls
- Tone · Drive · Volume
- Difficulty
- Easy
- Price
- see vendor
From the vendor
A classic overdrive effect that was designed to mimic the Marshall Bluesbreaker amplifier from the 1960s, the Bluesbreaker is also the source circuit for a number of high-dollar "boutique" guitar pedals.
With this project, you can build an original Bluesbreaker or either of the most popular clones, the Analogman King of Tone and the JHS Morning Glory, or your own custom flavor. Like the Stratus (Tube Screamer) project, its feedback clipping section is extremely flexible and allows for any imaginable combination of diodes as well as a switch to go between two configurations. The second switch optionally allows you to include a Bright Cut mod (from the Morning Glory) or a hard-clipping mod (from the King of Tone).
Demo videos
Here’s a demo video from Ryan Wood testing out a Cerulean built to Morning Glory specs:
Schematic
The schematic is in the vendor's build document. Open the build document. No KiCad fragment has been drawn for this circuit yet.
Parts list 35 rows
Report a wrong parse| Ref | Value | Normalized | Type | Notes |
|---|---|---|---|---|
| Resistors 11 | ||||
| R1 | 1M | 1M | ||
| R2 | 3k3 | 3.3k | ||
| R3 | 4k7 | 4.7k | ||
| R4 | 10k | 10k | ||
| R5 | 220k | 220k | ||
| R6 | 6k8 | 6.8k | ||
| R7 | 1k | 1k | ||
| R8 | 6k8 | 6.8k | ||
| R9 | 1M | 1M | ||
| R10 | 47k | 47k | ||
| R11 | 47k | 47k | ||
| Capacitors 10 | ||||
| C1 | 10n | 10n | ||
| C2 | 47pF | 47p | ||
| C3 | 10n | 10n | ||
| C4 | 10n | 10n | ||
| C5 | 100n | 100n | ||
| C6 | 10n | 10n | ||
| C7 | 10n | 10n | ||
| C8 | 100n | 100n | ||
| C10 | 100uF | 100u | ||
| C11 | 100uF | 100u | ||
| Diodes 5 | ||||
| D1 | 1N914 | 1N914 | ||
| D2 | 1N914 | 1N914 | ||
| D3 | 1N914 | 1N914 | ||
| D4 | 1N914 | 1N914 | ||
| D11 | 1N4002 | 1N4002 | ||
| Transistors 1 | ||||
| Q1 | (omit) | (OMIT) | ||
| ICs 1 | ||||
| IC1 | TL072 | TL072 | ||
| Potentiometers 4 | ||||
| TONE | 25KB | B25k | Potentiometer | |
| DRIVE | 100KB | B100k | Potentiometer | |
| VOLUME | 100KA | A100k | Potentiometer | |
| RPD | 1M | 1M | Potentiometer | |
| Switches 1 | ||||
| SW2 | SPDT | SPDT | ||
| LEDs 1 | ||||
| LED1 | into | INTO | ||
| Jacks & sockets 1 | ||||
| J1 | to | TO | ||
Other boards based on the Marshall Bluesbreaker
- Cerulean Aion FX · 1590B · $12.50
- King OF The Morning Effects Layouts · 125B · $12.00
- Breaking Blues Five Cats Pedals · £4.50
- Bluesbreaker PCBWay: Glory to Ukraine
- Blue Breaker PedalPCB · 125B · $8.00