Akashic Guitar effects PCB lookup
DRIVETONECURVEVOLUME

125B · 4 knobs

Aion FX

KarkadannDynamic Overdrive

Based on the Way Huge Green Rhino

Category
Overdrive
Controls
Drive · Tone · Curve · Volume
Difficulty
Intermediate
Price
$12.50in stock

From the vendor

A drive pedal based loosely on the classic Tube Screamer with a few extra tone-shaping controls added.

The Karkadann Dynamic Overdrive is an adaptation of the Way Huge Green Rhino Mark II, an updated version of the original Green Rhino that was first released in 1996, based on the Tube Screamer. While it was technically their best-selling pedal, only 419 of them were produced while Way Huge was active between 1992 and 1999.

In 2008, Jeorge Tripps went to work for Dunlop, who was eager to resurrect the Way Huge brand with their support behind it. The Mark II version was designed by Jeorge and released in 2011.

The Mark IV followed in 2016. There is no record of a Mark III, so either it was an unreleased prototype or they just skipped a number. Regardless, the Mark IV drops the Curve control and adds a new 500 Hz control, along with a toggle switch to drop both the 100 Hz and 500 Hz EQ stages to return it to the sound of the original 1990s version.

Another confusing detail: the original Green Rhino was called the “Green Rhino Overdrive II” to distinguish it from the Red Llama, the company’s other overdrive. There was only one version of the Green Rhino during the 1990s and it was always called the Overdrive II. The Mark II that came fifteen years later is different.

The Karkadann is a direct adaptation of the Green Rhino Mark II circuit with no modifications.

Schematic

The schematic is in the vendor's build document, page 7. Open the build document. No KiCad fragment has been drawn for this circuit yet.

Parts list 69 rows

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RefValueNormalizedTypeNotes
Resistors 28
R11k1kMetal film resistor, 1/4W
R2560k560kMetal film resistor, 1/4W
R310k10kMetal film resistor, 1/4W
R410k10kMetal film resistor, 1/4W
R551k51kMetal film resistor, 1/4W
R63k33.3kMetal film resistor, 1/4W
R722k22kMetal film resistor, 1/4W
R81k1kMetal film resistor, 1/4W
R9220R220Metal film resistor, 1/4W
R1022k22kMetal film resistor, 1/4W
R111k1kMetal film resistor, 1/4W
R121k1kMetal film resistor, 1/4W
R13470k470kMetal film resistor, 1/4W
R1410k10kMetal film resistor, 1/4W
R1510k10kMetal film resistor, 1/4W
R1610k10kMetal film resistor, 1/4W
R1710k10kMetal film resistor, 1/4W
R1824k24kMetal film resistor, 1/4W
R19470R470Metal film resistor, 1/4W
R2010k10kMetal film resistor, 1/4W
R2110k10kMetal film resistor, 1/4W
R2210k10kMetal film resistor, 1/4W
R2310k10kMetal film resistor, 1/4W
R241M1MMetal film resistor, 1/4W
R25680k680kMetal film resistor, 1/4W
R261M1MMetal film resistor, 1/4W
RPD2M22.2MMetal film resistor, 1/4W
LEDR4k74.7kMetal film resistor, 1/4W
Capacitors 16
C122n22nFilm capacitor, 7.2 x 2.5mm
C21uF1uFilm capacitor, 7.2 x 3.5mm
C356pF56pMLCC capacitor, NP0/C0G
C4220n220nFilm capacitor, 7.2 x 3.0mm
C547n47nFilm capacitor, 7.2 x 2.5mm
C6220n220nFilm capacitor, 7.2 x 3.0mm
C7220n220nFilm capacitor, 7.2 x 3.0mm
C81uF1uFilm capacitor, 7.2 x 3.5mm
C9220n220nFilm capacitor, 7.2 x 3.0mm
C101uF1uFilm capacitor, 7.2 x 3.5mm
C111uF1uFilm capacitor, 7.2 x 3.5mm
C1210uF10uElectrolytic capacitor, 5mm
C13100uF100uElectrolytic capacitor, 6.3mmPower supply filter capacitor.
C1447uF47uElectrolytic capacitor, 5mmReference voltage filter capacitor.
C15100n100nMLCC capacitor, X7RReference voltage filter capacitor.
C16100n100nMLCC capacitor, X7RPower supply filter capacitor.
Diodes 3
D11N58171N5817Schottky diode, DO-41
D21N9141N914Fast-switching diode, DO-35
D31N9141N914Fast-switching diode, DO-35
Transistors 5
Q12N50882N5088BJT transistor, NPN, TO-92Substitute; original uses PN2484.
Q22N50882N5088BJT transistor, NPN, TO-92Substitute; original uses PN2484.
Q32N50882N5088BJT transistor, NPN, TO-92Substitute; original uses PN2484.
Q42N50882N5088BJT transistor, NPN, TO-92Substitute; original uses PN2484.
Q52N50882N5088BJT transistor, NPN, TO-92Substitute; original uses PN2484.
ICs 3
IC1LF353NLF353NOperational amplifier, DIP8
IC2LF353NLF353NOperational amplifier, DIP8
IC3LM833LM833Operational amplifier, DIP8
Potentiometers 5
100HZ20kBB20k16mm right-angle PCB mount pot
CURVE5kBB5k16mm right-angle PCB mount pot
DRIVE500kBB500k16mm right-angle PCB mount pot
TONE20kCC20k16mm right-angle PCB mount pot
VOL.100kBB100k16mm right-angle PCB mount pot
Switches 1
FSW3PDT3PDTStomp switch, 3PDT
LEDs 1
LED5mm5MMLED, 5mm, red diffused
Jacks & sockets 6
IC1-SDIP-8 socketDIP-8 SOCKETIC socket, DIP-8
IC2-SDIP-8 socketDIP-8 SOCKETIC socket, DIP-8
IC3-SDIP-8 socketDIP-8 SOCKETIC socket, DIP-8
IN1/4" mono1/4" MONO1/4" phone jack, closed frameSwitchcraft 111X or equivalent.
OUT1/4" mono1/4" MONO1/4" phone jack, closed frameSwitchcraft 111X or equivalent.
DC2.1mm2.1MMDC jack, 2.1mm panel mountMouser 163-4302-E or equivalent.
Hardware 1
ENC125B125BEnclosure, die-cast aluminumCan also use a Hammond 1590N1.