Akashic Guitar effects circuit lookup
MIDSUSTONEVOL

1590B · 4 knobs

Aion FX

Halo (Legacy)

Based on the Electro-Harmonix Big Muff Pi· 73 other boards clone it

Category
Fuzz· Distortion / Sustainer, Fuzz
Controls
Mid · Sus · Tone · Vol
Difficulty
Easy
Price
see vendor
Buy the PCB at Aion FX Build document Build Documentation (V1) pdf

From the vendor

One of the most classic guitar effects of all time, its sound falls somewhere between a distortion effect and a fuzz with an incredibly long sustain.

There’s no shortage of PCB offerings for a Big Muff, but I’ve tried to make a board that could be used to build any variation or clone out there as well as incorporating a number of mod options. Here are a few of the features:

• Optional “Presence” or midrange control (more info at AMZ). If you choose not to use this control, the Tone pot has two possible orientations so you can still have a symmetrical control layout.

• Extra pads for clipping diodes, allowing you to easily use LEDs or just about anything else

• Choice between two different gain recovery/output stages: “classic” or JFET (like in the BJFE Fire Red Fuzz)

• Space for large 1uf film caps where appropriate, allowing you to build any historical variant of the BMP

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 54 rows

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Got parts in a drawer? See what you can build with them.

ocr read from an image · sch paired from the schematic · fixed corrected by hand. Check marked values against the build document.

RefValueNormalizedTypeNotes
Resistors 24
R23k33.3k
R1839k39k
R382k82k
R1939k39k
R4390k390k
R20390k390k
R5820R820
R21100k100k
R622k22k
R2212k12k
R71k1k
R232k72.7k
R88k28.2k
R24100R100
R10390k390k
R11150R150
R1212k12k
R138k28.2k
R1482k82k
R15390k390k
R16820R820
R1722k22k
R9100k100k
R1012k2k
Capacitors 16
C1100n100n
C3100n100n
C4100n100n
C5560pF560p
C650n50n
C7100n100n
C8560pF560p
C950n50n
C104n4n
C1110n10n
C12100n100n
C13100n100n
C14100uF100u
C15100n100n
C2470pF470p
C10110uF10u
Diodes 5
D11N9141N914
D21N9141N914
D31N9141N914
D41N9141N914
D51N40011N4001
Transistors 4
Q12N50882N5088
Q22N50882N5088
Q32N50882N5088
Q42N50882N5088
Potentiometers 4
Mid25KBschB25kPotentiometer
Sus100KBschB100kPotentiometer
Tone100KBschB100kPotentiometer
Vol100KAschA100kPotentiometer
LEDs 1
LED1intoINTO

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