Akashic Guitar effects circuit lookup
EXPANDERVOLUMETONEOCTAVE

1590B · 4 knobs

Aion FX

Rift (Legacy)

Based on the Univox Super-Fuzz· 37 other boards clone it

Category
Fuzz· Octave Fuzz
Controls
Expander · Volume · Tone · Octave
Difficulty
Intermediate
Price
see vendor
Buy the PCB at Aion FX Build document

From the vendor

A classic untamed fuzz from the 1970s that adds an octave-up overtone, famous for its use by Pete Townshend of The Who.

The Rift is a modified version of the Univox Superfuzz, a classic octave fuzz. It was originally developed by the Shin-Ei company in Japan and called the FY-6, but they also rebadged the circuit for over a dozen other brands such as Apollo, Electra and Hohner. However, the Univox Superfuzz was the most well-known of the brands and is considered the definitive version of the circuit.

The Rift includes two modifications that lend more flexibility to this circuit. While the original unit only had a tone switch to go between two presets, here you have the option of using a pot instead to blend between them. There is also a clipping switch to allow you to choose between two different sets of diodes, or lift them altogether for a different (and much louder) sound.

Schematic

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

Parts list 64 rows

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RefValueNormalizedTypeNotes
Resistors 30
R122k22k
R2100k100k
R3100k100k
R41k81.8k
R547k47k
R6470k470k
R710k10k
R847k47k
R93k33.3k
R10220k220k
R11150k150k
R1210k10k
R1310k10k
R14470R470
R15470R470
R16100k100k
R1722k22k
R1810k10k
R191k81.8k
R2022k22k
R21100k100k
R2247k47k
R2310k10k
R2422k22k
R2510k10k
R26100k100k
R2715k15k
R2810k10k
R291k1k
R30100k100k
Capacitors 16
C110uF10uelec
C22n22.2n
C310uF10uelec
C4100n100n
C510uF10uelec
C610uF10uelec
C710uF10uelec
C810uF10uelec
C910uF10uelec
C1010uF10uelec
C1110uF10uelec
C121n1n
C13100n100n
C1410uF10uelec
C1510uF10uelec
C16100uF100uelec
Diodes 7
D21N34A1N34A
D31N34A1N34A
D41N9141N914
D51N9141N914
D61N9141N914
D71N9141N914
D11N40021N4002
Transistors 6
Q12SC8282SC828
Q22SC8282SC828
Q32SC8282SC828
Q42SC8282SC828
Q52SC8282SC828
Q62SC8282SC828
Potentiometers 4
EXPANDER50KBB50kPotentiometer
VOLUME50KBB50kPotentiometer
TONE50KBB50kPotentiometer
OCTAVE10KBB10kPotentiometer
LEDs 1
LED1intoINTO

Other boards based on the Univox Super-Fuzz