Akashic Guitar effects circuit lookup
DRIVEFATNESSOUTPUT

Enclosure not stated · 3 knobs

Tagboard Effects

Roger Mayer Page 1Verified

Based on the Roger Mayer Page 1

Category
Distortion
Controls
Drive · Fatness · Output
Build
Vero· 19×13· 18 cuts, 8 links
Layout
Verified · Tagboard Effects marks it as built and working
Tags
Distortion, Fuzz, Roger Mayer

From the post

Request. Info about the original from Roger Mayer:

In 1964 I designed my first fuzz guitar effects pedal that was used by Jimmy Page and Big Jim Sullivan and featured on many early hit records. I am pleased to announce that after 40 years this early ground breaking fuzz will be available again. It uses carefully selected germanium transistors and has the same distortion section as the original 1964 version. An added carefully tuned passive fatness control follows the distortion section and this adds fatness without messing up the guitar's detail or the distortion characteristics. It has all the features of the new Vision Series with Hard Wire and Buffered Dual Outputs and is housed in the same style of new enclosure. This reissue meets our strict guidelines of keeping the best of the old but also adding some new noteworthy modern features and we at Roger Mayer welcome you to step on to a piece of genuine history.

Page 1 Front Panel Controls

DRIVE: This sets the amount of distortion.

FATNESS: A combination circuit tailored to provide control to the overall tone depth and is not just a simple top cut circuit.

OUTPUT:The output level boost available can also be used to drive the amplifier very hard if required.

Schematic

This is a board layout, a drawing of where each part goes, and the post may link the schematic it was drawn from. Open the layout at Tagboard Effects. No KiCad fragment has been drawn for this circuit yet.

Parts list 24 rows

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RefValueNormalizedTypeNotes
Resistors 10
×4470K470kread from the layout by eye
×310K10kread from the layout by eye
×239K39kread from the layout by eye
×233K33kread from the layout by eye
×147R47read from the layout by eye
×1100K100kread from the layout by eye
×12M22.2Mread from the layout by eye
×118K18kread from the layout by eye
×122K22kread from the layout by eye
×11K51.5kread from the layout by eye
Capacitors 6
×110n10nread from the layout by eye
×21n1nread from the layout by eye
×12n22.2nread from the layout by eye
×1220u220uelectrolytic; read from the layout by eye
×222u22uelectrolytic; read from the layout by eye
×12u22.2uelectrolytic; read from the layout by eye
Transistors 3
Q1BC550CBC550Cread from the layout by eye
Q2AC128AC128germanium; read from the layout by eye
Q3AC128AC128germanium; read from the layout by eye
ICs 1
×1LM301NLM301Nread from the layout by eye
Potentiometers 3
DriveB100KB100kPotentiometerread from the layout by eye
FatnessB100KB100kPotentiometerread from the layout by eye
OutputA100KA100kPotentiometerread from the layout by eye
Trimmers 1
×147K47kset IC pin 6 to half the supply; read from the layout by eye