Electro Harmonix Clone Theory

 This is it for, now. Covid restrictions were lifted here today so I'm going to take a break and try to live a normal life for a while ;-).  But here is a project of the 70s version of EHX Clone Theory which should keep you occupied for a while. An onboard voltage doubler is included followed by a 15v voltage regulator for the required power supply. The only addon in the audio path compared to the vintage units is a booster stage and volume trim before the output to cure the slight volume drop when the circuit is engaged.

Schematic is avaiable HERE.

Analog Bit Crusher

 

Walrus Audio Julia Chorus

 Requested a few times so here it is. It is based on Boss CE-2 but it has a few useful addons and mods. Schematic is avaiable HERE.

 

JHS Super Bolt

 

 

This one is for lovers of olde good Valco and Supro tone...

 

DAM Black on Black

 A super rare tonebender by DAM. Input stage is pretty much a Buzzaround preamp stage while the fuzz stage (Q3) is a 3 knob tonebender stage. The tonestack is slightly tweaked to be more focused on the lower mids.

King Tone The Soloist

 Requested quite a few times. Clémtent got hold of one for a repair and while he was at it he traced it and drew a schematic. He even built a clone and it sounds spot on.

Note that both 220nF caps are tantalums in the real units but film caps will sound identical.

 

 

 

Colombo Plexi Breed

 Schematic is avaiable HERE.

Lectric Fx Momento Delay / PT2399 EHX Memory Man

 Ok, another monster of a layout...

Here is a delay based on the earliest version of EHX Memory Man (not Deluxe version). The obsolete and super rare SAD1024 BBDs is replaced by a PT2399 and is supposed to share almost the same sonic qualities, i.e. dark and murky. The rest of the audio circuit is pretty much the same as the old vintage units except for some upgrades to the reduce the noise floor. Also there is a voltage doubler with a 15v regulator added to achieve the requierd headroom found in the vintage units.

Schematic, more info and setup guide is avaiable HERE.

EarthQuaker Devices Interstellar Orbiter

 Schematic is avaiable HERE.

 

Boss CE-2 / CE-2B Chorus

 This one is for one those dark rainy days...

Schematic is avaiable HERE.

OKKO Diablo Boost+ version

 Several versions has been made of this great sounding overdrive  and this version is called "Boost+.The layout is based on the schematic at FSB but I took the liberty to do some changes that could be useful. 

First, the J FETs remains to be unknown so I added a Bias trimpot to be able to use several types of J Fets.

Second, the internal 9v/18v switch is now panel mounted.

Third, Level+ control is now external....simply because there are too many trimpots already!

All the trimpots (except for the Bias) is on the edge of the board for the option to build an 11 knob overdribe...:-p.

 

Danelectro 3699 Fuzz

 A tweaked Foxx Tone Machine that some people have requested. Once again it is traced by TOFO. 

So what makes it different from a stock Tone Machine? Lots of oddball resistor values, twice as big input, output and decoupling caps, Shottky diodes and a Mid Boost switch at the tonestack which can be subbed for a on/off/on switch for an extra Mid Scoop setting.

OKKO Dominator

 Schematic is avaiable HERE.

Dwarfcraft Devices Eau Claire Thunder V1

 Traced by TOFO. This is a layout for the early big box version with three footswitches. It is based on the russian Big Muff but with more gain, reversed tonestack tone bypass switch, switchable and tunable feedback loop and a diode selector switch for the second clipping stage.

Electronic Audio Experiments Beholder

 Another request. Here is something quite different; sort of a distressed sounding reverb/fuzz/noisebox. Schematic is avaiable HERE.

Redson 12 Overdrive

 Here is a quite rare old japanese  low to mid gain overdrive that is supposed to sound really good.

A big thanks to Tobias for the trace!

 

 

Guyatone MM2 Metal Master w. mods

Schematic is avaiable HERE.

Some mods needed to be done to make it more versitale. First, the 3 position slider switch is replaced by a rotary switch. Second, High and Mid eq sections were hardwired internally. Since  they are pretty much the same as in Boss MT-2 High and Mid eq sections, it was pretty easy to add external pots for these.

 

Electronic Audio Experiments Mu Blaster

 This was a request. Schematic and a neat circuit description is avaiable HERE.

Fulltone 2B

 Schematic is avaiable HERE.

Note that this is a buffered effect so the offboard wiring is a bit unusual.

 

Danelectro Daddy O