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LEVEL 1LEVEL 2MASTER LEVEL

Enclosure not stated · 3 knobs

Revolution Deux

Zvex Super Duper 2-in-1

Based on the Z.Vex Super Duper 2-in-1· 8 other boards clone it

Category
Boost
Controls
Level 1 · Level 2 · Master Level
Price
see vendor
Tags
freestompboxes.org trace
Read the post at Revolution Deux Schematic imagefreestompboxes.org threadMadbean Pedals FireBomb project

From the vendor

Two cascaded Zvex Super Hard-On channels in one box, each a single BS170 MOSFET common-source stage with a 9.1V zener protecting the gate and a 5K gain (Level) rheostat in the source. Channel 2's output bleeder resistor is replaced by a 100K Master volume so the pair can be used as an overdrive at any output level. Each channel has its own footswitch.

Use 3PDT switches instead of DPDT to add LED indicators. The post suggests building two Super Hard-On layouts, or Madbean's FireBomb project, for a board.

Schematic

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

Parts list 20 rows

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RefValueNormalizedTypeNotes
Resistors 8
R110M10Mchannel 1 gate to ground; read from the schematic by eye
R210M10Mchannel 1 drain-gate; read from the schematic by eye
R35.1K5.1kchannel 1 drain; read from the schematic by eye
R4100K100kchannel 1 output bleeder; read from the schematic by eye
R510M10Mchannel 2 gate to ground; read from the schematic by eye
R610M10Mchannel 2 drain-gate; read from the schematic by eye
R75.1K5.1kchannel 2 drain; read from the schematic by eye
R8100100power filter; read from the schematic by eye
Capacitors 5
C1100n100nchannel 1 input; read from the schematic by eye
C210u10uelectrolytic, channel 1 output; read from the schematic by eye
C3100n100nchannel 2 input; read from the schematic by eye
C410u10uelectrolytic, channel 2 output; read from the schematic by eye
C5100u100uelectrolytic, power filter; read from the schematic by eye
Diodes 2
D19.1V zener9V1channel 1 gate; read from the schematic by eye
D29.1V zener9V1channel 2 gate; read from the schematic by eye
Transistors 2
Q1BS170BS170read from the schematic by eye
Q2BS170BS170read from the schematic by eye
Potentiometers 3
Level 15K5kPotentiometerchannel 1 gain; read from the schematic by eye
Level 25K5kPotentiometerchannel 2 gain; read from the schematic by eye
Master Level100K100kPotentiometerread from the schematic by eye

Other boards based on the Z.Vex Super Duper 2-in-1