Electro Harmonix Small Stone V1

 Layout for the first version of Small Stone which was produced between 1974(?) and 1978.

Layout is based on schematic from Lectric Fx

 Note that original had long gone obsolete 8 pin OTA chips so this layout is modernized for easy to get LM13700s.

 

Ross Distortion w. Tan/Black switch

 

Ross Phaser (OTA version)

 

Echoplex EP-3 Pre Amp / Aion Ares

 Aions Ares project which is based on Echoplex EP-3 Pre Amp which includes an onboard voltage doubler for more headroom. Schematic and info on J FET selection avaiable HERE.

'Note that there is two ground connections on the board, the purpose is to reduce any potential noise from the charge pump.  Those wires can be connected to any off board ground points like your audio jacks and DC jack. I also replaced the Drain resistors with trimmers for fine tune the bias.

Runoffgroove Tri-Vibe

 

Jen KPS-900 Phase Shifter

Similar to MXR 45 phaser but the pesky J FETs is replaced by a CD4007 chip so no transistor matching is required.

 Schematic avaiable HERE

 

Animal Factory Baron Samedi Fuzz 4-knob

 

Dead Astronaut Timestream Reverb

 A simple delay with both subtle reverb tones as well as oscillation reverb....

Schematic HERE

 

 

Dead Astronaut Faze Filter

 Requested by Alltrax74, a phaser based on MXR Phase 90 with some bells and whistles. 

Schematic is avaiable HERE

Note that the J FETs should be matched for best effect and CLR 1 value is 47k in the schematic but you could probably go lower if you not using a super bright LED 

Maestro RM-1A Ring Modulator

 A requested circuit but bear in mind that it is rather big, has an onboard charge pump for 15v-15v operation, and has a quite complicated setup due to five multiturn trimmers.

I've omitted the (for now) the Osc, Pitch, Carrier and Modulation jacks but might add it later on if is requested but it will be an "offboard wiring extravaganza".

 Schematic is avaiable HERE

Trimper setup is avaiable  HERE

 

 

 

 

 

Hudson Electronics Broadcast 9v/24v

 This pedal comes in two options, one that has an onboard charge pump for 24v operation and one without so here is two layouts for it....

*Edit*

9v version is now verified. 

 

 

 

 

 

 

 

 

 

JHS 3 Series Distortion

 

JHS 3 Series Overdrive

 Got some request for Overdrive and Distortion in the the new JHS 3 range. Was a bit hesistant at first since those are basically a Tubescreamer and a Rat with some simple mods....not "mostly own designed";-).

First up a Tubescreamer....sorry JHS 3 Series Overdrive.

Bixonic Expandora

 Schematic avaiable HERE

 

PE-12 Elektronika Venta Overdrive

 An old Soviet overdrive/distortion with some interesting features. The layout is  modified and modernized to use three dual 8 pin op amps instead of 14 pin single op amps that was used in the original pedal.

 

 

 

JHS 3 Series Fuzz

 Verified by AlexS.

Roland AD-50 Double Beat w. mods by Mark Hammer

 Mark Hammer tweaked one of the coolest yet most forgotten circuits a few years ago. Roland AD-50 Double Beat was a Fuzz Wah from the 70's with a fuzz with three tone settings and a "so-so" wah. He added three more tonestings for more versatility.

I built the stock Double Beat a while ago and found the normal setting sounding really good, one of the best fuzz sounds around while setting 2 and 3 sounded iether very thin or dark and dull so those settings is modified for this layout as well.

Also the stock Sustain control goes from fuzzy to very fuzzy so I added a Pre Gain control before the circuit since it cleans up really good. Original had 2SC1000 transistors which is obsoslete but really liked the sound of metal can 2N2222's in this circuit.

Tone settings is as follows: 

1. Normal Fuzz. Sounds killer!
2. Treble Boost. Original had 250pF cap which made it sounding very thin. Cap value is increased a bit to make this setting a bit more usable.
3. Treble Cut. Dark and muffled with original cap values. They are slightly reduced in this layout.
4. 2-pole Low Pass Filter. Similar in sound to setting 1 but a bit smoother.
5. Crossover Distortion. Same eq as setting 1 but has a quite rough "sandpaper grit" feel to it
6.  Scoop. Similar to scoop mode in a Superfuzz.

 

Fuzzhead Fx Stoner Bee

 Another take one the Bee Baa. Did a version a while ago called Pink Goat with a the notch filter tone setting reworked among other things.

Here after some more tinkering we have Stone Bee. Compared to stock Bee Baa it has a bit more gain and less highs in all three gain stages. Tone section is replaced by one of the best big muff tonestacks around, the one from Grind Custom Fx Ultrastoner. Since the sizzle can be a bit much for some there is a "Highs"control which blends in a filter cap across the base and collector at Q3.

 

 

 

 

Roland AF-100 Bee Baa Layout 2

 Had an old unverified layout that were pretty much trash. Got a request to build a stock Bee Baa so I drew a new layout for it.

One useful mod is to raise the overall output for the fuzz section by jumper 47k and 68k resistors connecting to the Volume control on the on the right side of the board.

 

 

And per request, a smaller layout with the Boost section removed.

 

 

 

 

DOD FX56 American Metal

 

Xotic EP Booster

 

Ibanez No. 58 Standard Wau Fuzz - Fuzz section

 Similar to the Ibanez No 59 Standard Fuzz but with a different tone section and a few extra resistors. If you want a bit more overall output level, 47k resistor connecting to Balance 3 could be can be replaced with a small value or a jumper. Another useful mod is to sub the germanium diodes with silicons for more crunch and tighter, louder fuzz.