Akashic Guitar effects PCB lookup
BASSBOOSTDRIVETREBLEVOL

125B · 5 knobs

PCB Guitar Mania

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

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RefValueNormalizedTypeNotes
Resistors 15
R12m20.0022
R2510k510k
R33k33.3k
R51k51.5k
R63k33.3k
R73k33.3k
R83k33.3k
R910k10k
R1010k10k
R121M1M
R132M22.2M
R143k33.3k
R15330r330
R16330r330
R11100r100
Capacitors 14
C510nf10n
C61uf1u
C7100nf100n
C1247nf47n
C14100nf100n
C847uf47u
C947uf47u
C1347uf47u
C147nf47n
C2100pf100p
C339nf39n
C41uf1u
C11100nf100n
C1047uf47u
Diodes 10
D01n58171N5817
D11n41481N4148
D21n41481N4148
D31n41481N4148
D41n41481N4148
D51n41481N4148
D61n41481N4148
D71n41481N4148
D8BAT46BAT46
D9BAT46BAT46
Transistors 1
Q12N50882N5088
ICs 1
IC1JRC4559JRC4559
Potentiometers 5
BASS50KBB50kPotentiometer
BOOST1KBB1kPotentiometer
DRIVE1MBB1MPotentiometer
TREBLE50KBB50kPotentiometer
VOL10KAA10kPotentiometer
Switches 1
SW1SPDTSPDT
LEDs 2
D113mm LED3MM LED
D123mm LED3MM LED