EarthQuaker Devices Bit Commander

 

Krank SK - Krankenstein Amp Emulator

 A J-FET / MOSFET amp emulator of Krank Krankenstein. Very interesing transistor setup with MOSFET and silicon diodes in some of the gain stages. Schematic specifies KP303s for the J FETS but western analouges is J201 and 2N5457/58. Managed to keep it reasonable small so the brave one could try to fit this 6 knobber in a 1509B box....

 
 

 

 

 

 

MTK demo time.

 

 

 

MTK Woodworks S.M.F.R Fuzz

 MTK has played around with some one knob fuzzes and expanded it to a 4-knob domm/sludge machine.

Product description ;-):

S.M.F.R. Fuzz

The Stony Meat Face Ritual Fuzz combines the best parts of three of my favorite pedals. The grindy bite of the DAM Meathead, the raw low-end of the BAT Ritual Fuzz, and the phenomenal tone shaping of the Grind Custom FX Ultra Stoner. The SMFR is a fully saturated fuzz that can push the mids for growly stoner riffs or head down into the doomy thickness and anywhere between.  

 

 

 

 

 

Lastgasp Art Laboratories Rattle Crow

 

Multivox / Big Jam SE-4 Octave Box

 A pretty cool variation of MXR Blue Box with a few extra bits and features. The only thing that is a bit unclear is the switch that selects between  one octave down, 1/2 octave down and 2 octave down. Original has a 3 position slider switch but I would like to convert to a toggle switch (3PDT on/off/on or DPDT on/on/on?) or maybe a rotary but I'm not sure how to tackle it. Layout has the switch labels per the schematic which can be found in this link:  https://music-electronics-forum.com/filedata/fetch?id=829397

*update*7mike_p found a solution for the switch. See hit comment below.

 

 

MXR Blue Box w. mods

 Couldn't resist to add another layout for the Blue Box since there is a bunch of mods online...

• Octave switch that toggles between stock two octave down setting and one octave down setting.
  
• Treble boost switch that lifts up 10nF low pass filter cap before the Output control. Should result in an overall brighter and louder tone.
•  Both potentiometers is increased from 50k to 100k. This is supoosed to increase the overall output.

 One untested mod that could be fun to try out would be replacing 330ohm resistor that sends voltage to the CD4013 IC with a small value potentioeter for a starve control since those chips can behave quite funnilly at different voltages.

'

MXR Blue Box

 

JHS Moonshine V2 Overdrive

 Per request. HERE is the schematic.

Escobedo T.M.K. (Too Many Knobs)

 Another noisemaker fuzz from the old DIY wizard Tim Escobedo...

Friedman Small Box

 :o)

Schematic is avaiable HERE.

 

 

 

 

 

Marshall Supa Wah

 Schematic is avaiable HERE.

Roland AD-50 Double Beat Wah section

 This was a request. Primary intended for the fuzz section but could of course be used as a stand alone unit.

Parasit Studio Sonic Reducer V2

 Schematic avaiable HERE.

 

Escobedo Ugly Face

 

 

 Demo by MTK

 

Durham Crazy Horse

 Cranked Neil Young toanz in a box with an interesting sag/bias control labelled Volts. And yes....D4 is going nowhere....

Updated 201224 and now drawn from a  schematic without bugs, avaiable HERE.

 

Parasit Studio The Corruptor V3

 Latest version (V3) of a square wave fuzz with a PLL IC to achieve ring modulation.

Schematic and info is avaiable HERE.

 

 

Parasit Studio Raygun Youth Chaos Fuzz

 One of the craziest things I've heard. An op amp fuzz that tickles a Phase Locked Loop IC from one of my DIY heroes, Fredrik Lyxén of Parasit Studio. Schematic, demo and more info HERE.

Hudson Electronics Sidecar

 A TS with bandaxall tonestack, a germanium transistor wired as a clipping diode and a high fidelity op amp. Schematic is avaiable HERE.

Lovetone Brown Source

 There has been several schematics of this one over the years, each one having some bugs. But recentrly Lacesensor at FSB managed to do a proper trace and he posted thr corretions at FSB.

 

 

Death by Audio Absolute Destruction

 A transatralntic trace by Enrico, AlexS and fuzzhead. 

A big thanks goes to Enrico for letting us trace his pedal, all the images and the schematic.

The layout is tested and verified. There is some odd parts in there which can easily be subbed for other values. (221ohm to 220 ohm and 4,64k to 4,7k). MPSA05G transistors isn't that common but MPSA06 which is more widely avaiable works fine and is almost identical spec wise.

Also, Overload is linear, not log as in the first posted layout.