DOD Envelope Filter 440 Reissue

 Per request. This is supposed to a great envelope filter with both up and down sweeps.

Schematic is avaiable HERE.

 

Guyatone WR3 Wah Rocker

 A fairly simple to build auto wah that is supposed to sound really good.

Schematic is avaiable HERE.

Hagerman Amplification Fuzz

 Schematic is avaiable HERE.

Hagerman Amplification Octave Up

 Schematic is avaiable HERE.

Hagerman Amplification Distort

 Schematic is avaiable HERE.

Hagerman Amplification Transistor Overdrive

 Schematic is avaiable HERE.

Maestro Fuzz Phazzer FP-1

 The layout is based on Brian Kepharts modernized version of this weird, fun and old device.  

HERE is a link to a very detalied description of this circuit, schematic, bias setup and explenations of the small but useful modifications.

Hagerman Amplification Echo - PT2399 Delay

 Schematic is avaiable HERE.

Blackhawk Amplifiers Valkyrie Drive V3

 This one was quite tricky to trace. Got the topology figured out quite quickly but but identifying some of the capacitor values was quite difficult with these Greenies with faded markings. Had to look at several units, all had some minor variations but I think the layout below is pretty much spot on.

It is a heavy fuzzy overdrive with the gain control rolled back, maxed out it is a high gain fuzz. Most units had a 100k gain control with quite a limited range. It was later reworked for V4, using a 500kC potentiometer which gives a much more useful range.

It can be quite noisy with the gain maxed out (probably bcause of the layout itself, not the circuit design...) but short wires and shielded by an enclosure helps.

Hagerman Amplification Scream - LM386 Overdrive

 Schematic is avaiable HERE.

 

 

Spontaneous Audio Devices Son of Kong (modified)

 Layout is based on schematic from PedalPCB.

This is a stripped down version of the original pedal to make it fit into a small enclosure. For those who wants to build the complete circuit, Deadend Fx has PCB on their site called Diddy.

 

 

Death by Audio Evil Filter

 

 

 

The layout above is still unverified but I did a smaller simplified version a while ago. The fuzz section has been removed since didn't care for it. Less offboard wiring and and a smaller enclosure...and you can put your favorite fuzz after it.

 

 

DOD Looking Glass OD

 Based on schematic from PedalPCB.

Ampeg Phazzer

 Schematics avaiable at FSB.

 

 

Abasi Pathos Distortion

 Turned out a bit big but it will fit in a BB enclosure...

Based on the schematic avaiable at PedalPCB.

Randall RRED Overdrive

 ...and this one is for the Pantera and Dimebag fans...

Schematic avaiable at PedalPCB.

 

Blackhawk Amplifiers Gandalf Octave Fuzz

 Traced by evilarsen.

A great sounding octave up fuzz which has an op amp slamming a transformer and two diodes just like in an old Octavia. The transformer listed is 42TL022 but the more recent version has a different unknown part number which is supposed to work even better. A wild guess would be 42TL002?

More info at Blackhawk Amplifiers.

Subdecay Variac

 Based on schematic from PedalPCB.

Analogman Peppermint Fuzz

 The Sun Faces evil twin. Buzzy, raspy and no clean up at all!

The transistors part numbers remains unknown but the Hfe should be almost almost twice as high compared to the usual recommended germanium Fuzz Face gain.

More info HERE.

 

 

 

 

Analogman Sun Face

 Per request.

There are a few schematics to choose from so I decided to use the one from Fuzzdog which has an internal trimpot so you can fine tune the sweep of the Sun Dial control.

 

 

 

 

BenSpinks shared the values from his RCA Mid Gain Sun Face. They differs quite a bit so here we have an RCA layout as well. 

 

Runoffgroove 22/7

 A DIY classic by Runofgroove. It is a Big Muff but the transistors is replaced with hex inverters.

Schematic and more info HERE.

 

 

MXR Phase 45

 

WTF Big Enuff? - Violet Edition

 Another distortion unit designed by Pedro (WTFiCanBuildMyOwnPedals). Here is his own words on his creation.

"This one will destroy many amps and eardrums. It is nothing new, just a marriage between a Big Muff and the Booster from the FZ-2 (pedalPCB's version) which has a very powerful EQ... and it sounds exactly like I imagined it. Anders was very helpful, as always, in putting a layout together when this came in conversation and after some developing here it is. Earlier versions had less pots and was just a fuzz, but this is the ultimate version in my opinion: no need to waste a perfectly good booster and why not have lots of controls to shape the texture of the fuzz? 

The DPDT switch (which I like to have on a footswitch) activates or bypasses the three gain stages of the BMP (LEVEL, GAIN) before hitting the booster (MASTER; BOOST, HIGH, LOW). Everything interacts pretty much with everything to create diverse and loud textures of fuzz with crazy sustain. This one is loosely based on a Violet Ram's Head, which is one of my favourite Muffs, but every version should work (a Russian version for bass was also built and sounds great)."

 

 

Blackhawk Amplifiers Valhalla Fuzz V1

Here we have a layout for the first (I think!) handwired version of  Blackhawks take on a Fuzz Face. But it has a few interesting and useful extra things going on. 

First, a passive pickup simulator so you can have a buffer upfront or anywhere in the signal chain. Next comes the fuzz circuit itself which are closely related to a Meathead but with larger input and electrolytic "gain" caps. Next there is two quite large value output caps that are connected to the Bass Boost switch. At the end of the circuit there is a simple but very effective notch filter that gives a wide array of tones, from rumbling bass, scooped mids and sizzly high mids.. The notch filter Tone control can be bypassed with the tone bypass switch and will give a big volume boost with a thick grinding middy fuzz. 

Note that the Bass Boost switch only works when the notch filter is engaged. Also note that I couldn't read the marking on C9 but I'm pretty confident that the value is 220nF.

C9 is now confirmed, 220nF it is

 

Maestro Fuzz Phazzer FP2-3 - modified

 

This one belongs to the category " old, weird and forgotten". Maestro Fuzz Phazzer was an odd piece of gear, a gnarly fuzz based on Maestro FZ-1S Super fuzz followed by an optical discrete phaser circuit....without a LFO. The sweep was controlled by a foot treadle which also acted as a volume control in "bypass" mode.

I had to do some modernizations for this. First, true bypass. Second, get rid of that  dual gang 30k phase/volume potentiometer. I replaced it with a single 50k pot so you can use either a normal wah pot or a normal potentiometer. The volume function is lost but I added a master volume control at the end of the circuit.

There are some things that need to be tested as well; the LDRs and the mini lamp. I can't find any info on the stock parts but a good start might be socket some Univibe LDRs and a random mini lamp with solder leads.