Mojo Hand Fx Iron Bell Fuzz

 

Monster Effects Mastortion

 Brent Hinds signature overdrive with a sligtly simplified power section. Schematic is avaiable at FSB.

 

JHS PG-14

 Per request. Schematic is avaiable at PedalPCB.

 

 

 

 

Tesla AYZ-030 Graphic Equalizer

 An old graphic equalizer from the former Chechoslovakia. For more fidelity, LM741 could with subbed with TL071 or other low noise single op amps.

Triungulo Lab Ensemble Crunch

 Here is a variation of the pre amp found in Roland/Boss CE-1. Note that the diode 1, 2 and the crunch switch is optional.

Big thanks to Lorenzo for the schematic and for verifying this layout!

 

GTC Bloody Finger

 Hmmm, a booster in front a of wah circuit, followed by a Red Llama? Sounds interesting!

Schematic is avaibale HERE.

 

Buzzefall - Laboga Mr Hector Amp Emulator

 Another high gain amp emulator, this time based on Laboga Mr Hector.

Fuzzhead Fx Red Sun Fuzz

 This one started as an attempt to improve an obscure old japanese germanium fuzz circuit from the late 60s called Sekova FA II Fuzz which suffered from quite low output and lack of sustain. After some experimenting I removed the clipping diodes, tweaked the bias and added another gain stage upfront which is borrowed from Roland Bee Baa but with a germanium transistor. For transistor selection I found that these with low leakage and a hfe around 100 sounds good but it is worth experimenting with others especially for Q2 and Q3.

 

 

 

ENGL 3

 Another ENGL amp emulator and another schematic from a russian DIY forum using both J FETs and MOSFETs. It is worth socketing the diodes at the MOSFET transistors since these only add a bit compression to the distortion.

 

 

JMK Paralyzer

MI Audio Super Blues Pro

 Schematic is avaiable HERE

Haunting Mids Fuzz V1

 First version with external switches. the design itself is completely different from later versions with two cascaded Szisklai silicon / germaium pair transistor stages. Switches A and B adjust gain and Switch C adjust bias of the second transistor pair. The original had Dale resistors which explains the odd values but use closest common values. Schematic is avaiable HERE.

Haunting Mids Fuzz V3

 This was a request. It is basically a stripped down Big Muff without external gain control, tone control and recovery stage. Decoupling caps is a bit bigger than most Big Muff variants and the clipping diodes is LEDs and Zener diodes.

M3 Emthree Mini Synthy

 This is an obscure octave down fuzz from Italy, manufactued in 70's. The three pontentiometers adjust normal fuzz, one octave down and two octave down. Note that I made small mod to this one since the original SAJ110 IC is long gone obsolete and expensive. It is replaced with a CD4024 binary counter and divider IC.

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.

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