Balmoral Electric RCA: BA-31C Preamp

 Schematic, writeup and layout is avaiable HERE. A gain control and a tone switch is added for some versitalty.

 

Germanium "Tube" Preamplifier

 Per request. Runs on -6v so I added a voltage inverter and voltage regulator along with pulldown resistors and polarity protection.

 

 

 

Balmoral Electric AIWA: 1011 Reel to Reel Preamp

 Andrew over at Vero P2P blog played around with old preamps a couple of years ago. Converting them to 9v stompbox cuircuits usually with some germanium mods. I think these deserves more attention.

First out is a preamp from a AIWA tape machine.

Schematics, writeup and layout is avaiable HERE. 

 

Death by Audio Interstellar Overdriver w. clean blend

 A contribution from Chris:

I pulled out my Bass VI the other day for the first time in over a year, and realized I needed an overdrive with a clean blend. I took the clean boost+blend section from the DeadEndFX take on the DBA Space Ring and placed the Interstellar Overdriver (still my favorite dirt circuit after all these years) in the loop of it.

It worked perfectly. I added a limiting resistor to ground on the level of the Interstellar OD just because I wanted the minimum levels of the "clean" and "OD level" knobs to sound similar... So here's an Interstellar OD with a clean blend so you can use it on bass - verified and good to go. 

 

Celestial Engineering Heavy Water Modulator

 Per request. Chuck D. Bones take on Fairfield Shallow Water. 

Schematic is avaiable HERE. 

 

Fairfield Circuitry Shallow Water

Schematic is avaiable HERE. 😰

 

 

 

Maestro FSH-1 Filter Sample/Hold

 Per request. With modern part numbers and three additional controls.

Schematic is avaiable HERE. 

 

Electro Harmonix Octave Multiplexer

 Early vintage version with two quad op amps and post recovery boost stage.

Schematic is avaiable HERE. 

 

Lasrgasp Art Laboratories Hypnospiral

 Schematic is avaiable HERE.

 

Stone Deaf Fx PDF-2

 Stone Deaf's take on a Maestro MPF-1. I added a Volume control since this thing gets loud. I also omitted the expression since a volume pedal with custom made dual wah pot is required.

Schematic is avaiable HERE. 

 

Butcher Pedals Pistol Slapper

 Schematic is avaiable HERE.

 

Guyatone PS-002 Chorus

 Quite a unique 128 stage BBD chorus topology with its own flavour.

Traced by Bernaduur and the schematic is avaiable HERE. 

 

Spaceman Effects Spacerocket 2

 Schematic is avaiable HERE.

 

Electro Harmonix Talking Pedal (EH-3200)

 Rarely cloned because of a custom made 11/7k dual gang pot.  As a workaround I added a couple of resistors in parallel with a common dual 100k pot (7,5k and 12k).

 

 

 

 

Dead End Fx Wurmloch / Death by Audio Space Ring

Per request.  A DBA Space Ring gets a Dead End treatment...

Add Clean, Blend and "Worm Hole" controls along with a "Worm Hole" switch you get a versitale ringmod/tremolo/fuzz box of mayhem.... 

Schematic is avaiable HERE. 

 

BJFe / Bearfoot Mint Green Mini Vibe

 Schematic is avaiable HERE.

 

Aleph Null Parallel Peacock Fuzz

 Build doc with info and schematic is avaiable HERE.

 

Aleph Null Oomph! Overdrive

 Schematic, writeup and demo is avaiable HERE.

 

Dead Astronaut Fx Dreamtime Delay

 2x2399 in series delay with current mirror setup for long clean delay times. Note that Rate and Depth pot is wired backwards in the schematic. Changed it for the layout and also subbed the 1mA pots for 1mC's.

Schematic is avaiable HERE. 

 

Dead Astronaut Fx Astro Flanger Filter

 A 9v EHX Electric Mistress Flanger with some sensible mods and addons.

Schematic is avaiable HERE.