Cornish SS-2 Light Drive

 With onboard input buffer. The original had two LM741s but these is replaced with its dual op amp equivalent 1458 to keep the board reasonably small

Cornish Buffer

 

Klon Buffer

 

El Musico Loco Blisterlily

 

Fuzzhead Fx Dronestortion Mk. I

 Last layout for a while. This is sort of a hack job, combining a Rat tuned for more low end with a LED/silicon diodes clipping switch. Then the signal is splitted into two signal paths using the Mid Scoop and Mid Boost tone sections from Boss FZ2. Signal is then fed into a treble cut control and an output buffer.

*Update 200909*

Tweaked it a bit more. A cap to ground at the input solved some noise artifacts without altering the overall sound. Highs control is now a 50kC pot.

Oh, and the name was changed to Dronestortion since....it can do some drone metal.

*Update 200912*

Final update, I promise.

The LED clippers seemed to the driving the following eq op amp stages into clipping resulting in some crackle and a bit harsch decay. Replaced those with normal 1N4148's and for the lower threshold diodes I used germanium diodes, old soviet D9K's but any ge diode will do with V.d. 0,3-0,27.

 

 

 

 

 

 

 

 

 

Basic Audio Lucky Number

 Schematic and info avaiable HERE

 

 

Yamaha OD-10MII Overdrive

 An obscure old japanese ovedrive circuit that looks like your worst 80's metal pedal. But the reputation is pretty good and it has its small fanbase. And it is not a YATS.

 

EarthQuaker Devices Terminal Fuzz

 

Little Jim

 Found this cool little thing at DIYSB. A fairly simple high gain circuit which is supposed to emulate a cranked Marshall using three MOSFETS with a J FET buffer up front. There is a simple treble roll of at the end of the circuit.

Write-up, schematic and a demo HERE

 

 

Dinosaural Tube Bender w. Aion Wyvern mod

 

 Schematic and info at Aion Electronics

 

 

Fuzzhead Fx Harmonic Gyrolator

 Harmonic Percolator is one the coolest vintage dirtboxes out there with its simple yet unique design, its odd even order harmonics texture, odd mojo parts and it is also a very good overdrive with the gain control rolled back. 

But using mostly humbucker equipped guitars nowadays  it tend to be overly compressed and a bit muddy and dull. Started to tinker with it tso it would suit hot humbuckers but no dice. As it is an unique circuit like no other, the usual mods didn't work out very well like reducing input cap or add a resistor in line with the input signal.

But I stumpled upon Dead End Fx Splinter project whcih offers a sollution for this namely reducing the coupling cap value between the transistors and adding a cap across the base of Q1 and ground.

Later on I added a "Texture" control which techically is a resostat which alters the resistanse to ground for one of the clipping diodes. Most stock HP's has 4,7k resistor here for some assymetric clipping. I used a 10k pot so stock setting is at noon, turn it up and you get a more open and wide distortion, roll it back for some glithy compreesed sounds with sub octaves jumping around.

And I added a two band gyrator tonestack at the end with values not to far away from Boss HM2. The result is a quite lo-fi, fat, industrial and grim fuzz.

 

 

 

 

 

 

Earthquaker Devices Bows

 As requested.

Darkglass Vintage Microtubes

 

Zencafe's Microtubes 2K

At first I thought this was an original Darkglass design but couldn't find any info on it except for the schematic. But it turns out it is a DIY designed project by zencafe at DIYSB. Schematic and info in this thread, 

Looks like a fun and quite simple project which looks like a hotrodded Red Llama/Tube Sound Fuzz with some extra tonal options
 

Darkglass Microtubes B3K

 

Earthquaker Devices Dunes

 

Lell Heavy Metal DEQ-700

 Schematic avaiable HERE

 

The switch appears to a on/off selector for the distortion section so it can be used as a stand alone eq pedal as well. 

 

Lell Hyper Distortion

 

 

 

 

Lell EX-9 Exciter

 Schematic avaiable HERE

Note that pot lug numbers isn't labelled in the schematic. And the pot tapers is unknown but my best guess is that they are linear. 

This one seems to be a treble booster/light overdrive with a tonestack somewhat related to a parametric eq.

 

Yerasov Gamma HM-3 Heavy Metal