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125B · 3 knobs

PCB Guitar Mania

UberBolt

Based on the JHS Superbolt

Category
Preamp / Amp-in-a-box· Old-school overdrive preamp
Controls
Drive · Tone · 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:

UberBolt is the newest and improved version of Superbolt, one of the most distinguished pedals in the history of JHS, a stompbox that managed to recreate the classic sound of a Supro amps of the 1960.

It’s so acclaimed because tons of guitarists out there love the classic, crunchy, old-school overdrive tones with plenty of warmth and roundness the pedal has to offer. If you are one of them, this PCB has been specially designed for you!

Introduction

Hey! Would you like to have a pedal that lets you experience the feel and sound of the original amp that inspired players like Jimmy Page, Brian Setzer, and Switchfoot’s Drew Shirley? What are you waiting for then?! Just call an UberBolt and ride it into the homeland of the classic, amp-like rock tones. Just a warning: UberBolt can drive you through nasty tonal roads. At lower settings, you get a more subtle, darker tone. And since it’s an updated version of the original, this pedal boasts an improved taper on the volume control for a wider sweet spot.

Now that you are in, let’s check what this great pedal can do. Fits of all, notice that there’s no spiky, modern-style distortion to be found here. The control set is stray forward and will lead you exactly where you want to go:

A Volume knob that doesn’t need to turn it much to get some serious overdrive—a Tone knob for adjusting the brightness and a Drive knob for the gain.

The gain switch allows you to switch between two different styles of overdrive. Put it in the down position to achieve smoother and less aggressive tones that enable you to emulate the sound of an amp that’s just breaking up into overdrive – ideal for blues-like styles. Change it to the up position for a dirtier tone with higher headroom and upper-mid emphasis for that classic heavy rock tone.

Controls

Potentiometers

• Tone

• Drive

• Volume

For any technical questions regarding this build don’t forget to check out our Facebook Group and our forum at Free Stomp Boxes.

Uber-Bolt – Building Docs

Uber-Bolt – Drilling template

Schematic

The schematic is in the vendor's build document, page 5. Open the build document. No KiCad fragment has been drawn for this circuit yet.

Parts list 45 rows

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RefValueNormalizedTypeNotes
Resistors 13
R11m1M
R2120k120k
R141m1M
R151k51.5k
R16470k470k
R172k72.7k
R1810k10k
R19470k470k
R20330r330
R2112k12k
R2212k12k
R234k74.7k
R2410k10k
Capacitors 17
C173n33.3n
C20100n100n
C21100n100n
C833u33u
C18100u100u
C1910u10u
C2210u10u
C2310u10u
C722n22n
C9470p470p
C104n74.7n
C114n74.7n
C12470p470p
C1310n10n
C144n74.7n
C1510n10n
C163n33.3n
Diodes 4
D11n58171N5817
D23mm3MM
D31n58171N5817
D41n58171N5817
Transistors 3
Q1J201J201
Q2J201J201
Q3J201J201
ICs 1
IC3TC1044SCPATC1044SCPA
Potentiometers 3
DRIVE500KAA500kPotentiometer
TONE500KAA500kPotentiometer
VOL50KAA50kPotentiometer
Trimmers 3
TRIM1100K100kTrimmer
TRIM2100K100kTrimmer
TRIM3100K100kTrimmer
Jacks & sockets 1
J201Q1Q1