Akashic Guitar effects circuit lookup
DRAIN TRIMGAINVOLUMETONE

Enclosure not stated · 4 knobs

Revolution Deux

Greer Amps Sucker Punch

Based on the Greer Amps Sucker Punch· 6 other boards clone it

Category
Distortion
Controls
Drain trim · Gain · Volume · Tone
Price
see vendor
Tags
freestompboxes.org trace
Read the post at Revolution Deux Schematic imagefreestompboxes.org thread

From the vendor

Nick Greer's high-gain distortion, sold as a preamp plus 'power amp' design voiced after a dying vintage Marshall Lead. The trace shows a J201 JFET booster with a trimmer on the drain feeding the Gain pot and an LM386 power amp chip that does the distortion, followed by the Volume pot and a simple treble-cut Tone control. The post's author is not a fan of 386 distortions because of their note decay.

Schematic

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

Parts list 15 rows

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Fixes to the schematic, from the post

  • The output capacitor after the LM386 is marked '???' on the drawing; it is 100n.
Check before you build · 1 value the reader of this schematic was not sure of
  • The tone capacitor is marked '.01uF*'; the asterisk is not explained.
RefValueNormalizedTypeNotes
Resistors 3
R12.2M2.2Mgate to ground; read from the schematic by eye
R21.5K1.5ksource; read from the schematic by eye
R310K10kLM386 input; read from the schematic by eye
Capacitors 6
C122u22uelectrolytic, source bypass; read from the schematic by eye
C210n10nJFET output; read from the schematic by eye
C322p22pLM386 input; read from the schematic by eye
C422u22uelectrolytic, LM386 pins 1-8; read from the schematic by eye
C5100n100noutput; drawn '???', the post gives 100n; read from the schematic by eye
C610n10ntone; drawn .01uF*; read from the schematic by eye
Transistors 1
Q1J201J201read from the schematic by eye
ICs 1
IC1LM386LM386read from the schematic by eye
Potentiometers 4
Drain trim100K100kPotentiometertrimmer on the J201 drain; read from the schematic by eye
GainA1MA1MPotentiometerread from the schematic by eye
VolumeA250KA250kPotentiometerread from the schematic by eye
ToneB100KB100kPotentiometerread from the schematic by eye

Other boards based on the Greer Amps Sucker Punch