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GAINTREBLEBASSMIDLEVEL

125B · 5 knobs

Aion FX

Perelandra DeluxeBoost / Overdrive

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

Category
Overdrive· Boost, overdrive
Controls
Gain · Treble · Bass · Mid · Level
Difficulty
Intermediate
Price
$12.50in stock

From the vendor

A flexible drive pedal that can go from clean volume boost to smooth overdrive. Includes a 2-band tone stack for treble & bass as well as a clipping diode switch and midrange tone control.

The Perelandra Deluxe Boost / Overdrive is a recreation of the Xotic BB Preamp, a flexible tone machine that lets you go from a clean boost to a nice smooth overdrive with a 3-band EQ to shape the tone and three clipping options.

This is an expanded version of the original Perelandra, developed based on direct traces of several BB variants. Modifications have been incorporated from the “Comp” and “MB” (mid boost) custom shop models. Each of these modifications can be set to a position that mimics the stock circuit, so while you now have additional tone-shaping tools available, the original tone of the BB Preamp is unaffected.

The Perelandra Deluxe does not replace the original Perelandra, which is a simpler build with fewer controls and components. The original Perelandra also has the option to build the Bass BB Preamp variant which the Deluxe does not cover.

Note: This project uses a type of capacitor that has been temporarily discontinued by WIMA. Please see our news article about the issue and the substitution spreadsheet for project-specific recommendations. We are stocking an equivalent from Kemet in the mean time. The build document has not yet been updated to reflect this.

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 69 rows

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RefValueNormalizedTypeNotes
Resistors 26
R11k1kMetal film resistor, 1/4W
R2470k470kMetal film resistor, 1/4W
R310k10kMetal film resistor, 1/4W
R410k10kMetal film resistor, 1/4W
R510k10kMetal film resistor, 1/4W
R64k74.7kMetal film resistor, 1/4W
R71k1kMetal film resistor, 1/4W
R810k10kMetal film resistor, 1/4W
R9220R220Metal film resistor, 1/4W
R101k1kMetal film resistor, 1/4W
R111k1kMetal film resistor, 1/4W
R1247k47kMetal film resistor, 1/4W
R1310k10kMetal film resistor, 1/4W
R1447k47kMetal film resistor, 1/4W
R154k74.7kMetal film resistor, 1/4W
R164k74.7kMetal film resistor, 1/4W
R1733k33kMetal film resistor, 1/4W
R1810k10kMetal film resistor, 1/4W
R19470k470kMetal film resistor, 1/4W
R2010k10kMetal film resistor, 1/4W
R21470R470Metal film resistor, 1/4W
R22100k100kMetal film resistor, 1/4W
R2310k10kMetal film resistor, 1/4W
R2410k10kMetal film resistor, 1/4W
RPD1M1MMetal film resistor, 1/4WInput pulldown resistor.
LEDR4k74.7kMetal film resistor, 1/4WLED current-limiting resistor. Adjust value to change LED brightness.
Capacitors 19
C122n22nFilm capacitor, 7.2 x 2.5mm
C21uF1uFilm capacitor, 7.2 x 3.5mm
C347pF47pMLCC capacitor, NP0/C0G
C447n47nFilm capacitor, 7.2 x 2.5mm
C5220n220nFilm capacitor, 7.2 x 2.5mm
C6220n220nFilm capacitor, 7.2 x 2.5mm
C71uF1uFilm capacitor, 7.2 x 3.5mm
C8100n100nFilm capacitor, 7.2 x 2.5mm
C9150pF150pMLCC capacitor, NP0/C0G
C1033n33nFilm capacitor, 7.2 x 2.5mm
C1133n33nFilm capacitor, 7.2 x 2.5mm
C124n74.7nFilm capacitor, 7.2 x 2.5mm
C134n74.7nFilm capacitor, 7.2 x 2.5mm
C1410uF10uElectrolytic capacitor, 5mm
C15100n100nFilm capacitor, 7.2 x 2.5mm
C1610uF10uElectrolytic capacitor, 5mm
C1747uF47uElectrolytic capacitor, 5mmReference voltage filter capacitor.
C18100uF100uElectrolytic capacitor, 6.3mmPower supply filter capacitor.
C19100n100nMLCC capacitor, X7RPower supply filter capacitor.
Diodes 7
D11N58171N5817Schottky diode, DO-41
D21N9141N914Fast-switching diode, DO-35
D31N9141N914Fast-switching diode, DO-35
D41N9141N914Fast-switching diode, DO-35
D51N9141N914Fast-switching diode, DO-35
D61N9141N914Fast-switching diode, DO-35
D71N9141N914Fast-switching diode, DO-35
Transistors 2
Q12N50882N5088BJT transistor, NPN, TO-92Substitute. Original uses 2SC1815.
Q22N50882N5088BJT transistor, NPN, TO-92Substitute. Original uses 2SC1815.
ICs 2
IC1JRC4558DJRC4558DOperational amplifier, DIP8
IC2JRC4558DJRC4558DOperational amplifier, DIP8
Potentiometers 4
GAIN1MBB1M16mm right-angle PCB mount pot
BASS50kBB50k16mm right-angle PCB mount pot
MID20kWW20k16mm right-angle PCB mount potModification from “MB” custom shop model.
LEVEL100kB dual100KB DUAL16mm right-angle PCB mount potLinear taper, dual right-angle PCB mount.
Switches 2
COMPSPDT cntr offSPDT CNTR OFFToggle switch, SPDT on-off-onModification from “Comp” custom shop model.
FSW3PDT3PDTStomp switch, 3PDT
LEDs 1
LED5mm5MMLED, 5mm, red diffused
Jacks & sockets 5
IC1-SDIP-8 socketDIP-8 SOCKETIC socket, DIP-8
IC2-SDIP-8 socketDIP-8 SOCKETIC socket, DIP-8
IN1/4" mono1/4" MONO1/4" phone jack, closed frameSwitchcraft 111X or equivalent.
OUT1/4" mono1/4" MONO1/4" phone jack, closed frameSwitchcraft 111X or equivalent.
DC2.1mm2.1MMDC jack, 2.1mm panel mountMouser 163-4302-E or equivalent.
Hardware 1
ENC125B125BEnclosure, die-cast aluminumCan also use a Hammond 1590N1.

Other boards based on the Xotic BB Preamp