Akashic Guitar effects circuit lookup
VOLUMEFUZZ

125B · 2 knobs

PCB Guitar Mania

Octavius

Based on the Roger Mayer Octavia· 27 other boards clone it

Category
Octave / Pitch· Vintage octave fuzz
Controls
Volume · Fuzz
Difficulty
Average
Price
€9.90out 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

Inspired by one of Tycobrahe’s most famous and distinctive designs. Frequently used by Jimy Hendrix, this pedal produces a fuzz sound that is one octave higher than the note you are currently playing, delivering unique tones in the process.

Introduction

This classic circuit originated in early 1967, is an analog board with the properties of a frequency doubler, envelope generator, and amplitude modulator with additional frequency shaping filter circuits. Its features can be recognized in many of Jimi Hendrix’s recordings, just as “Purple Haze,” “Fire,” “One Rainy Wish,” “Little Miss Lover,” “Little Wing,” “Machine Gun,” and several others.

The pedal produces a clean fuzz that will allow the octave sound to go through, and when you put some chord on it, you can hear that great ring modulation sound happening.

We also added an “octave lift” switch so you can use it without the octave overtones for added flexibility. If you prefer to keep it loyal to the original, just wire a jumper between pads 1 and 2 of the switch silkscreen.

This easy-to-build board will allow you to have one of the most collectible vintage pedals out there.

Controls

• Fuzz

• Volume

For further analysis on this circuit, take a look at this thread on Free Stomp Boxes Forum.

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

Octavius 1.1v – Building Docs

Octavius 1.0v – Building Docs

Octavius – Drilling template

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 32 rows

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RefValueNormalizedTypeNotes
Resistors 12
R4180K180k
R71K1k
R111K21.2k
R11M1M
R5220K220k
R6220R220
R1022K22k
R9470R470
R847K47k
RLED4K74.7k
R2680K680k
R3680K680k
Capacitors 9
C1100n100n
C4100n100n
C2150p150p
C31n1n
C6100u100u
C9100u100u
C533u33u
C833u33u
C7220u220u
Diodes 3
D21n34a1N34A
D31n34a1N34A
D11n58171N5817
Transistors 3
Q22N44012N4401
Q32N44012N4401
Q12n50872N5087
Transformers 1
XFM142TM02242TM022
Potentiometers 2
VOLUME500K AA500k
FUZZ1K BB1k
Switches 1
SW1SPDT ON/ONSPDT ON/ON
LEDs 1
LED3mm Red LED3MM RED LED

Other boards based on the Roger Mayer Octavia