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GAINBASSTREBLELEVEL

125B · 4 knobs

Aion FX

NebulaVintage Distortion

Based on the Maxon DS-830· 1 other board clones it

Category
Distortion
Controls
Gain · Bass · Treble · Level
Difficulty
Intermediate
Price
$12.50in stock

From the vendor

A vintage-inspired distortion that uses both hard and soft clipping along with an active boost or cut for both bass and treble frequencies.

The Nebula Vintage Distortion is based on the Maxon DS-830 Distortion Master, first released in 2001 as part of Maxon’s Vintage Series. While the circuit was a brand new design, its aesthetics were inspired by the “big box” Maxon and Ibanez effects of the late 1970s such as the OD-880 and Phase Tone II.

The DS-830 circuit features both hard and soft clipping, with op-amp feedback diodes followed by diodes to ground, similar to the Nobels ODR-1. The EQ is made of two active gyrators, a bass control at 126 Hz and a treble control at 2.5kHz. Each of these frequencies can be boosted or cut as needed.

The updated version of the Nebula includes one new feature: a 3-way toggle switch that allows you to select soft clipping only, hard clipping only, or the stock mode with both sets of diodes engaged. This lends a bit of extra control over the clipping character not found in the original pedal. Other than this addition, it’s a direct adaptation of the DS-830.

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 a limited supply 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 66 rows

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RefValueNormalizedTypeNotes
Resistors 27
R110k10kMetal film resistor, 1/4W
R21M1MMetal film resistor, 1/4W
R310k10kMetal film resistor, 1/4W
R410k10kMetal film resistor, 1/4W
R5100k100kMetal film resistor, 1/4W
R62k2kMetal film resistor, 1/4W
R7390R390Metal film resistor, 1/4W
R81k1kMetal film resistor, 1/4W
R910k10kMetal film resistor, 1/4W
R10100k100kMetal film resistor, 1/4W
R1122k22kMetal film resistor, 1/4W
R1210k10kMetal film resistor, 1/4W
R13560R560Metal film resistor, 1/4W
R143k93.9kMetal film resistor, 1/4W
R1510k10kMetal film resistor, 1/4W
R1610k10kMetal film resistor, 1/4W
R17220R220Metal film resistor, 1/4W
R183k3kMetal film resistor, 1/4W
R19510k510kMetal film resistor, 1/4W
R2010k10kMetal film resistor, 1/4W
R21100k100kMetal film resistor, 1/4W
R22470R470Metal film resistor, 1/4W
R2310k10kMetal film resistor, 1/4W
R2410k10kMetal film resistor, 1/4W
R25100R100Metal film resistor, 1/4W
RPD2M22.2MMetal film resistor, 1/4WInput pulldown resistor. Can be as low as 1M.
LEDR4k74.7kMetal film resistor, 1/4WLED current-limiting resistor. Adjust value to change LED brightness.
Capacitors 18
C1100n100nFilm capacitor, 7.2 x 2.5mm
C23n93.9nFilm capacitor, 7.2 x 2.5mm
C31uF1uFilm capacitor, 7.2 x 3.5mm
C410pF10pMLCC capacitor, NP0/C0G
C51uF1uFilm capacitor, 7.2 x 3.5mm
C61uF1uFilm capacitor, 7.2 x 3.5mm
C7470n470nFilm capacitor, 7.2 x 3mm
C8100n100nFilm capacitor, 7.2 x 2.5mm
C93n33.3nFilm capacitor, 7.2 x 2.5mm
C103.3uF3.3uFilm capacitor, 7.2 x 5.5mm
C11220n220nFilm capacitor, 7.2 x 2.5mm
C1247n47nFilm capacitor, 7.2 x 2.5mm
C131uF1uFilm capacitor, 7.2 x 3.5mm
C14100n100nFilm capacitor, 7.2 x 2.5mm
C151uF1uFilm capacitor, 7.2 x 3.5mm
C16220uF220uElectrolytic capacitor, 6.3mmReference voltage filter capacitor.
C17220uF220uElectrolytic capacitor, 6.3mmPower supply filter capacitor.
C18100n100nMLCC capacitor, X7RPower supply filter capacitor.
Diodes 5
D11N58171N5817Schottky diode, DO-41
D21N9141N914Fast-switching diode, DO-35
D31N9141N914Fast-switching diode, DO-35
D41N9141N914Fast-switching diode, DO-35
D51N9141N914Fast-switching diode, DO-35
Transistors 4
Q12N54572N5457JFET, N-channel, TO-92Substitute. Original uses 2SK256-Y.
Q22N50882N5088BJT transistor, NPN, TO-92Substitute. Original uses 2SC1815-BL.
Q32N50882N5088BJT transistor, NPN, TO-92Substitute. Original uses 2SC1815-BL.
Q42N50882N5088BJT transistor, NPN, TO-92Substitute. Original uses 2SC1815-BL.
ICs 1
IC1JRC4558DJRC4558DOperational amplifier, DIP8
Potentiometers 3
GAIN250kAA250k16mm right-angle PCB mount pot
BASS5kCC5k16mm right-angle PCB mount pot
LEVEL100kAA100k16mm right-angle PCB mount pot
Switches 2
CLIPDPDT on-on-on TDPDT ON-ON-ON Toggle switch, DPDT on-on-onSee build notes for possible modifications.
FSW3PDT3PDTStomp switch, 3PDT
LEDs 1
LED5mm5MMLED, 5mm, red diffused
Jacks & sockets 4
IC1-SDIP-8 socketDIP-8 SOCKETIC socket, DIP-8
IN1/4" stereo1/4" STEREO1/4" phone jack, closed frameSwitchcraft 112BX 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 Maxon DS-830