125B · 5 knobs
Boosted Jimmy
Based on the Paul Cochrane Timmy
- Category
- Overdrive· Transparent Overdrive
- Controls
- Bass · Boost · Drive · Treble · Vol
- Difficulty
- Intermediate
- Price
- €11.90out of stock
Heads up Builders widely report inconsistent quality from PCB Guitar Mania boards, and whether a given board works is a gamble. Read recent forum reports before ordering.
From the vendor
Project overview:
Our beloved Timmy is a versatile board that allows us to build many different versions of this classic transparent overdrive. Choose between the classic Paul Cochrane version or the Lovepedals approach, featuring many custom mods. The boost section is a Lovepedal C0T 50, just like on the Amp 11.
Introduction
Paul Cochrane has created one of the best and most cloned transparent overdrives ever. There are plenty of “Boutique” brands that have cloned this circuit and claimed it as their own design.
Here you have some examples of pedals based on this beloved circuit:
• Vemuram Jan Ray (300 USD rip off)
• Lovepedal Amp 11 (Includes a COT 50 as boost section)
• Lovepedal Kalamazoo (Different tone control)
• Rockett .45 Caliber (simplified version without one opamp section)
• Walrus Audio Mayflower (Hybrid with a TS)
However, for this project’s purpose, we focused on making this board optimized for building the classic Timmy and the Lovepedal Amp 11, as are just a couple of values different from each other.
We have included two external toggles that add different sets of diodes into the clipping section, replacing the original Timmy’s internal dip switch.
The boost section is a replica of the Lovepedal COT 50 (Church of tone) as its presence on the AMP 11.
Controls
• Drive
• Bass
• Treble
• Volume
• Boost
For further analysis on this circuit, take a look at this thread on Free Stomp Boxes Forum and DIY Stomp Boxes Forum.
For any technical questions regarding this build, don’t forget to check out our Facebook Group and our forum at Free Stomp Boxes.
Important: We recently changed the name from Beloved Timmy to Boosted Jimmy. You may receive a version from before the name change.
Boosted Jimmy 2v1 – Building Docs
Beloved Timmy 1.1v – Building Docs
Beloved Timmy 1.1v – Drilling Template
Beloved Timmy 1v – Building Docs
Beloved Timmy 1v – Drilling Template
Schematic
The schematic is in the vendor's build document, page 7. Open the build document. No KiCad fragment has been drawn for this circuit yet.
Parts list 49 rows
Report a wrong parse| Ref | Value | Normalized | Type | Notes |
|---|---|---|---|---|
| Resistors 15 | ||||
| R1 | 2m2 | 0.0022 | ||
| R2 | 510k | 510k | ||
| R3 | 3k3 | 3.3k | ||
| R5 | 1k5 | 1.5k | ||
| R6 | 3k3 | 3.3k | ||
| R7 | 3k3 | 3.3k | ||
| R8 | 3k3 | 3.3k | ||
| R9 | 10k | 10k | ||
| R10 | 10k | 10k | ||
| R12 | 1M | 1M | ||
| R13 | 2M2 | 2.2M | ||
| R14 | 3k3 | 3.3k | ||
| R15 | 330r | 330 | ||
| R16 | 330r | 330 | ||
| R11 | 100r | 100 | ||
| Capacitors 14 | ||||
| C5 | 10nf | 10n | ||
| C6 | 1uf | 1u | ||
| C7 | 100nf | 100n | ||
| C12 | 47nf | 47n | ||
| C14 | 100nf | 100n | ||
| C8 | 47uf | 47u | ||
| C9 | 47uf | 47u | ||
| C13 | 47uf | 47u | ||
| C1 | 47nf | 47n | ||
| C2 | 100pf | 100p | ||
| C3 | 39nf | 39n | ||
| C4 | 1uf | 1u | ||
| C11 | 100nf | 100n | ||
| C10 | 47uf | 47u | ||
| Diodes 10 | ||||
| D0 | 1n5817 | 1N5817 | ||
| D1 | 1n4148 | 1N4148 | ||
| D2 | 1n4148 | 1N4148 | ||
| D3 | 1n4148 | 1N4148 | ||
| D4 | 1n4148 | 1N4148 | ||
| D5 | 1n4148 | 1N4148 | ||
| D6 | 1n4148 | 1N4148 | ||
| D7 | 1n4148 | 1N4148 | ||
| D8 | BAT46 | BAT46 | ||
| D9 | BAT46 | BAT46 | ||
| Transistors 1 | ||||
| Q1 | 2N5088 | 2N5088 | ||
| ICs 1 | ||||
| IC1 | JRC4559 | JRC4559 | ||
| Potentiometers 5 | ||||
| BASS | 50KB | B50k | Potentiometer | |
| BOOST | 1KB | B1k | Potentiometer | |
| DRIVE | 1MB | B1M | Potentiometer | |
| TREBLE | 50KB | B50k | Potentiometer | |
| VOL | 10KA | A10k | Potentiometer | |
| Switches 1 | ||||
| SW1 | SPDT | SPDT | ||
| LEDs 2 | ||||
| D11 | 3mm LED | 3MM LED | ||
| D12 | 3mm LED | 3MM LED | ||