Tim Escobedo's take on the rare Harmonic Percolator. Simple with no mojo parts in sight.
Wednesday 23 February 2022
Thursday 10 February 2022
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.
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.
Wednesday 9 February 2022
Tuesday 8 February 2022
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.
Monday 7 February 2022
Sunday 6 February 2022
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.
Saturday 5 February 2022
Thursday 3 February 2022
Wednesday 2 February 2022
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.
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