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Enclosure not stated · 3 knobs

Effects Layouts (blog)

Mad Professor Amber DriveVerified

Based on the Mad Professor Amber Overdrive· 3 other boards clone it

Category
Fuzz
Controls
Drive · Tone · Volume
Layout
Verified · Effects Layouts (blog) marks it as built and working
Tags
Fuzz, Mad Professor, Overdrive

From the post

The Amber Drive is a slightly tweaked Fire Red Fuzz. Not a whole lot of differences between the two other than some value changes, but it's enough to make this not as fuzzy as the FRF apparently.

Here's the drilling template for this one. It should also work for the Fire Red Fuzz.

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 Effects Layouts (blog). No KiCad fragment has been drawn for this circuit yet.

Parts list 35 rows

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Check before you build · 1 value the reader of this layout was not sure of
  • 14.7K in the group of four resistors right of centre (rows G-J): printed clearly on both the board and the wiring diagram, unusual value
RefValueNormalizedTypeNotes
Resistors 15
×3100Ω100read from the layout by eye
×1150Ω150read from the layout by eye
×1470Ω470read from the layout by eye
×12K2kread from the layout by eye
×16.8K6.8kread from the layout by eye
×28.2K8.2kread from the layout by eye
×110K10kread from the layout by eye
×114.7K14.7kread from the layout by eye
×215K15kread from the layout by eye
×122K22kread from the layout by eye
×147K47kread from the layout by eye
×168K68kread from the layout by eye
×3100K100kread from the layout by eye
×3470K470kread from the layout by eye
×21M1Mread from the layout by eye
Capacitors 10
×1330pF330pread from the layout by eye
×1470pF470pread from the layout by eye
×110nF10nread from the layout by eye
×115nF15nread from the layout by eye
×147nF47nread from the layout by eye
×3100nF100nread from the layout by eye
×1220nF220nread from the layout by eye
×31uF1uelectrolytic; read from the layout by eye
×110uF10uelectrolytic; read from the layout by eye
×1100uF100uelectrolytic; read from the layout by eye
Diodes 1
×31N40071N4007printed 4007; two clippers and one on the +9v line; read from the layout by eye
Transistors 6
Q1BC550CBC550Cread from the layout by eye
Q2BC550CBC550Cread from the layout by eye
Q3BC550CBC550Cread from the layout by eye
Q42N54852N5485JFET; read from the layout by eye
Q52N38192N3819JFET; read from the layout by eye
Q62N38192N3819JFET; read from the layout by eye
Potentiometers 3
DriveA100KA100kPotentiometerboard lugs labelled Sustain; read from the layout by eye
ToneB100KB100kPotentiometerread from the layout by eye
VolumeB100KB100kPotentiometerread from the layout by eye

Other boards based on the Mad Professor Amber Overdrive