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GAINTREBLEOUTPUT

Enclosure not stated · 3 knobs

Revolution Deux

mictester Simplified Klon Centaur

Based on the Klon Centaur· 49 other boards clone it

Category
Overdrive
Controls
Gain · Treble · Output
Price
see vendor
Also as
Vero layout · from Revolution Deux
Tags
freestompboxes.org trace
Read the post at Revolution Deux Schematic imagefreestompboxes.org thread Vero layout

From the vendor

mictester's single-rail version of the Klon Centaur: the same circuit as the original without the charge pump, with each section adjusted so its response matches an original unit, and tested against originals. It keeps the dual-gang Gain pot that blends the clean path with the 1N34A germanium-clipped path, the active treble control and the buffered output, with a 1N4742 zener on the supply.

Schematic

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

Parts list 60 rows

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Check before you build · 3 values the reader of this schematic was not sure of
  • R1 is marked '10k*' on the drawing; the asterisk is not explained.
  • The resistor in U2B's feedback is labeled R241 (read as R24, 100k).
  • The vero layout's parts list differs in places: R12 410k (the schematic has R12 and R12A, both 820k, in parallel), C13 4n7 (the schematic has C13 and C13A, both 2n2), R5 5k (the schematic has R5 and R5A, both 10k), and a TL074 instead of two TL072.
RefValueNormalizedTypeNotes
Resistors 32
R110K10kdrawn 10k*; read from the schematic by eye
R21M1Mread from the schematic by eye
R3100K100kread from the schematic by eye
R4560560read from the schematic by eye
R510K10kread from the schematic by eye
R5A10K10kparallel with R5; read from the schematic by eye
R610K10kread from the schematic by eye
R71.5K1.5kread from the schematic by eye
R81.5K1.5kread from the schematic by eye
R91K1kread from the schematic by eye
R102.2K2.2kread from the schematic by eye
R1115K15kread from the schematic by eye
R12820K820kread from the schematic by eye
R12A820K820kparallel with R12; read from the schematic by eye
R131K1kread from the schematic by eye
R143.9K3.9kLED resistor; read from the schematic by eye
R1522K22kread from the schematic by eye
R1647K47kread from the schematic by eye
R1727K27kread from the schematic by eye
R1812K12kread from the schematic by eye
R1915K15kread from the schematic by eye
R2068K68kread from the schematic by eye
R211.8K1.8kread from the schematic by eye
R22100K100kread from the schematic by eye
R234.7K4.7kread from the schematic by eye
R24100K100kdrawn R241; read from the schematic by eye
R25560560read from the schematic by eye
R2668K68kread from the schematic by eye
R2768K68kread from the schematic by eye
R28100K100kread from the schematic by eye
R2927K27kbias divider; read from the schematic by eye
R3027K27kbias divider; read from the schematic by eye
Capacitors 19
C1100n100nread from the schematic by eye
C24.7u4.7uelectrolytic; read from the schematic by eye
C3100n100nread from the schematic by eye
C468n68nread from the schematic by eye
C568n68nread from the schematic by eye
C6390n390nread from the schematic by eye
C782n82nread from the schematic by eye
C8390p390pread from the schematic by eye
C91u1uelectrolytic; read from the schematic by eye
C101u1uelectrolytic; read from the schematic by eye
C112.2n2.2nread from the schematic by eye
C1227n27nread from the schematic by eye
C132.2n2.2nread from the schematic by eye
C13A2.2n2.2nparallel with C13; read from the schematic by eye
C143.9n3.9nread from the schematic by eye
C154.7u4.7uelectrolytic; read from the schematic by eye
C161u1uelectrolytic; read from the schematic by eye
C1747u47uelectrolytic; read from the schematic by eye
C1847u47uelectrolytic; read from the schematic by eye
Diodes 3
D21N34A1N34Agermanium, clipping; read from the schematic by eye
D31N34A1N34Agermanium, clipping; read from the schematic by eye
D41N47421N4742 / 12Vzener, supply; read from the schematic by eye
ICs 2
U1TL072TL072TL072CP; read from the schematic by eye
U2TL072TL072TL072CP; read from the schematic by eye
Potentiometers 3
GainB100KB100kPotentiometerP1, dual gang (P1A/P1B); read from the schematic by eye
TrebleB10KB10kPotentiometerP2; read from the schematic by eye
OutputB10KB10kPotentiometerP3; read from the schematic by eye
LEDs 1
D1LEDLEDred; read from the schematic by eye

Other boards based on the Klon Centaur