Akashic Guitar effects PCB lookup
GAINTREBLEVOL

125B · 3 knobs

PCB Guitar Mania

Exotic Preamp

Based on the Xotic BB Preamp· 3 other boards clone it

Category
Overdrive· TS type Overdrive
Controls
Gain · Treble · Vol
Difficulty
Intermediate
Price
€8.90out 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

Overdrive with roots on the classic TS808 featuring a Baxandall active Bass and Treble control to cut and boost the frequencies you need. This bad boy delivers around 30db boost, and it’s for sure one of the gainiest TS-inspired pedals out there.

Introduction

From the three Xotic Preamp pedals, the BB has the most amount of Gain and the biggest amount of Volume push. So it can deliver quite a lot of clean Boost (around 30db) to drive your amp harder by itself. That’s why we proudly choose this one for our first take on these classic designs. These Series are Stompboxes that are out there for a decade now and still can be spot on so many Pedalboards. One reason is for sure its active Bass and Treble EQ allows you to cut and boost frequency. Another reason is that the BB in the Name stands for Blues Braker; just by the name itself, you could hear some creamy lead tones in your head. Didn’t you? Is there more to say? Happy building!

The Building Doc applies to both the 1v0 and 1v1 versions of the PCB. The only distinction between the two models lies in the arrangement of the controls, so please use the drilling template that corresponds to your version.

Controls

Potentiometers

• Treble

• Bass

• Vol

• Gain

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

Exotic Preamp 1v0 & 1v1 – Building Docs

Exotic Preamp 1v1 – Drilling template

Exotic Preamp 1v0 – 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 55 rows

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RefValueNormalizedTypeNotes
Resistors 26
R12m20.0022
R21k1k
R3470k470k
R410k10k
R510k10k
R61k1k
R710k10k
R84k74.7k
R910k10k
R101k1k
R1119k19k
R121k1k
R13220r220
R1410k10k
R1547k47k
R1610k10k
R1733k33k
R184k74.7k
R194k74.7k
R20470k470k
R2110k10k
R2247r47
R23100k100k
R2410k10k
R2510k10k
R264k74.7k
Capacitors 18
C122n22n
C21u1u
C347p47p
C447n47n
C5220n220n
C6220n220n
C7100n100n
C8150p150p
C933n33n
C1033n33n
C114n74.7n
C124n74.7n
C14100n100n
C16100n100n
C1310u10u
C1510u10u
C17100u100u
C1847u47u
Diodes 4
D01n58171N5817
D11n9141N914
D21n9141N914
D33mm3MM
Transistors 2
Q12N50882N5088
Q22N50882N5088
ICs 2
IC1TL072TL072
IC2TL072TL072
Potentiometers 3
GAIN1MBB1MPotentiometer
TREBLE50KBB50kPotentiometer
VOL100KAA100kPotentiometer

Other boards based on the Xotic BB Preamp