Akashic Guitar effects PCB lookup
GAINLEVEL

125B · 2 knobs

PCB Guitar Mania

Thunder Lead

Based on the Marshall Super Lead

Category
Distortion· Vintage voiced reverb
Controls
Gain · Level
Difficulty
Average
Price
€9.90out of stock
Tags
diy-originals

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

Inspired by the tone of the Marshall Superlead, part of the series ‘Develop your own Preamp’ where you can combine preamp sections of iconic amplifiers with different types of EQs in order to create your own custom boutique pedal.

Introduction

You love that massive British Rock´n´Roll tone, but are tired that there are almost all related to the Plexi? Here is something for you. Run-off-Groove´s Thor is a take on the Marshall Super Lead . They replaced the Tubes with jets and tweaked it till they got it right. They even came up with a solution for the problem that this kind of circuit usually tempts to have too much gain compared to the original. Btw, the documents on their Page go deeper into this circuit if you want to know more about the theory behind how this circuit has designed.

Back to the sound and what you can expect from it. ROG is known for its amazing-sounding takes on existing designs. So what we did is I pretty much 1 to 1 copy of it but with the major benefits that you do not have to deal with tagboard to make one.

Sound-wise I was pretty surprised that this circuit isn’t done many more times. It Rocks way more than you need for your rhythm playing if gives you creamy leads you know from your favorite records from the 80s with a pretty authentic tube triode-like response. Also, the two toggles for brightness and low-end adjustment make way more sense than one would expect from just the flip of a switch. I really enjoyed playing with this little and easy-to-build project.

Controls

• Gain

• Level

• Bright switch

• Bottom Switch

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

Thunder Lead – Building Docs

Thunder Lead – Drilling Template

Schematic

The schematic is in the vendor's build document, page 6. Open the build document. No KiCad fragment has been drawn for this circuit yet.

Parts list 42 rows

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RefValueNormalizedTypeNotes
Resistors 17
R11M1M
R233k33k
R3390r390
R4470k470k
R51k1k
R6220k220k
R7390r390
R8390r390
R91M1M
R1010k10k
R1110k10k
R12120k120k
R1339k39k
R1456k56k
R15100k100k
R1633k33k
R172k72.7k
Capacitors 14
C7100u100u
C8100u100u
C1220p220p
C21n1n
C3470p470p
C4470p470p
C5100n100n
C6100n100n
C9100n100n
C10470p470p
C111n1n
C1222n22n
C1322n22n
C14100n100n
Diodes 1
D11n58171N5817
Transistors 4
Q1J201J201
Q2J201J201
Q3J201J201
Q4J201J201
ICs 1
IC1TL072TL072
Potentiometers 2
GAIN1MAA1MPotentiometer
LEVEL100KAA100kPotentiometer
Trimmers 2
TRIM5K5kTrimmer
TRIM220K20kTrimmer
Jacks & sockets 1
J201Q1Q1