dirtboxlayouts
Electro Harmonix Frequency Analyzer – Modern version
The modern version of EHX Frequency Analyzer. The ICL8083 IC is obsolete but there is still some vendors that have it in stock. Came out taller than expected since I wanted the bipolar voltage doubler circuit on the same board as the main circuit. But it will fit sideways in a BB enclosure… Schematic is … Read more
Frantone Vibutron
Per request. Included the “Rate mod”, a switch that toggles between two speed settings.. Schematic and info HERE.
Blackout Effectors Crystal Dagger
Here is a cool one. It is essentally two separate circuits in one box, a fuzz with a switchable octave up and a tweaked Small Stone phaser. Original had separate boards as well and if you wish you can house them in separate enclosures. If you decide to house them in one enclosure, the fuzz … Read more
Dunwich Amplification Olde Dirty Bass – Big box version
Update 2 210514 Both schematic and layout is now corrected. A big thank you to Vince who traced the later 125b version which revealed how the active Mid control really works. Update 1 210514 Caution! There was a mistake in the trace. The Mid control have a different setup than the schematic and … Read more
Thorpy Fx Gunshot Overdrive
A slightly modified Tubescreamer with the input buffer replaced by a SHO MOSFET booster. The Calibre control can be noisy but I guess “Crackle is OK”…. Schematic is avaiable HERE.
Dunwich Amplification Modified HM2 – “Left Hand Path” version
Traced by AlexS and Fuzzhead, this is a quite tweakable and heavily modified HM2 variant with more gain on tap, more volume, two on/off/on diode switches and a very flexible four band eq. It is a quite noisy beast when Gain and all eq controls is maxed out though but a buffer up front helps … Read more
Electro Harmonix V2 Big Muff Ram’s Head “White Can version” 1974
It is Pie Day so here is a layout of an old Ram’s Head variant. Rarely cloned and some cap values is not found in any of the other vintage EHX variants. 220pF/680pF caps replaces the standard 470pF/500pF values and the tonestack has less mid scoop. Still added a Mid switch for some sligtly boosted … Read more