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DRIVEBASSTREBLE

Enclosure not stated · 3 knobs

Revolution Deux

Colorsound Overdriver

Based on the Colorsound Overdriver· 10 other boards clone it

Category
Overdrive
Controls
Drive · Bass · Treble
Price
see vendor
Also as
Vero layout · from Revolution Deux
Tags
freestompboxes.org trace
Read the post at Revolution Deux Schematic imageKit Rae's Colorsound articlefreestompboxes.org thread Vero layout

From the vendor

The Overdriver, the Power Boost rehoused in a grey hammerite case for the American market and the pedal Jeff Beck used on Blow by Blow. This version runs on 9V: three silicon transistors (BC169C, BC184C or BC109): a two-transistor high-gain preamp with a 10k pot in the first stage's emitter, a Baxandall bass and treble stack, and a third transistor recovery stage. The recovery stage uses 150k/1k8/470 bias values instead of the 18V version's 180k/3k9/1k.

The vero layout adds an optional 1M input pull-down resistor (R15 on the layout). The vero layout shows an optional 100k volume control on the output. The vero builder adjusted the two 1k8 collector resistors (to 2k) to give 5V on the collectors; the reissue uses a 2k2 Gain pot and different capacitor values (layout color key).

Schematic

The schematic is in the post. Open it at Revolution Deux. No KiCad fragment has been drawn for this circuit yet.

Parts list 33 rows

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RefValueNormalizedTypeNotes
Resistors 14
R1120K120kread from the schematic by eye
R26.8K6.8kread from the schematic by eye
R3150K150kread from the schematic by eye
R412K12kread from the schematic by eye
R51.8K1.8kread from the schematic by eye
R6470470read from the schematic by eye
R84.7K4.7kread from the schematic by eye
R94.7K4.7kread from the schematic by eye
R1039K39kread from the schematic by eye
R115.6K5.6kread from the schematic by eye
R12150K150kread from the schematic by eye
R1333K33kread from the schematic by eye
R141.8K1.8kread from the schematic by eye
R15470470read from the schematic by eye
Capacitors 13
C1220n220nread from the schematic by eye
C222u22uelectrolytic; 10u in some units; read from the schematic by eye
C3220p220pread from the schematic by eye
C422u22uelectrolytic; read from the schematic by eye
C510u10uelectrolytic; read from the schematic by eye
C6100n100nacross Bass; read from the schematic by eye
C7100n100nread from the schematic by eye
C810n10nread from the schematic by eye
C910n10nread from the schematic by eye
C1010u10uelectrolytic; read from the schematic by eye
C1122u22uelectrolytic; read from the schematic by eye
C12220n220noutput; read from the schematic by eye
C1322u22uelectrolytic, power filter; read from the schematic by eye
Transistors 3
Q1BC169CBC169Cor BC184C, BC109; read from the schematic by eye
Q2BC169CBC169Cor BC184C, BC109; read from the schematic by eye
Q3BC169CBC169Cor BC184C, BC109; read from the schematic by eye
Potentiometers 3
Drive10K10kPotentiometerread from the schematic by eye
Bass100K100kPotentiometerread from the schematic by eye
Treble100K100kPotentiometerread from the schematic by eye

Other boards based on the Colorsound Overdriver