Benson Preamp

 Schematic and suggested trimput setup at PedalPCB.

Shin's Music Dumbloid

 

Electro Harmonix Ripped Speaker Fuzz

 Schematic is avaiable at PedalPCB

Tape Saturator Diode Compressor - Op Amp version

 A request by KG who also provided lots of useful information and a schematics for this. A bit more simple version of the DIYRE Tape Saturator circuit using op amps and there is no need for a rack circuitry. 

The circuit is supposed to run on 16v / -16v so there is an onboard bipolar voltage doubler although it only gives out around 15v /-15v but it is close enough. 

Info about the circuit HERE.

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Beetronics FX Fat Bee

 Per another "request" from Portugal....:-P.

Schematic is avaiable at PedalPCB,

Greer Sucker Punch

 Another request, a close relative to DAM Sonic Titan.

DIYRE 15IPS Tape Saturator Colour Mk. II

 This was a request and offers something quite different.... it is a tape syle diode compressor. Notice that it runs on 16v biploar power so if you want to power it with normal 9v, a bipolar volatge doubler daughterboard can be used.

 *Edit* 270421. Now verified and I got some reports it works perfectly fine using a simple FET Booster up front.

Schematic and info is avaiable HERE. 

Greer Tomahawk Deluxe Drive

 Requested by a gentleman from Portugal.:-)

Schematic is avaiable at PedalPCB.

EarthQuaker Devices Tone Job

 Schematic is avaibale HERE.

And product description and eq curves HERE.

DAM FS-77 Fuzz Sound

 Andy at the most excellent layout and resource blog Vero & Point-2-Point Layouts traced this interesting tonebender variant a few months ago. It is a tweaked Tonebender Mk. III/IV with an input cap blend control and a Big Muff tonestack with odd values. Schematic and tracing jornal is avaiable HERE.

*EDIT 220429* Andy discovered a mistake in the trace regarding the function of the Balance control. Layout is updated. LINK

 

 

Mad Professor Sweet Honey Overdrive

 

Fuzzrocious Ram the Manparts

 

Lell EP Parametric Equalizer

 A 3 band parametric eq from the Soviet Union, anyone? Electronic switching is removed and op amp is altered for normal 8 pin DIP package which replaces the odd dual op amp 14 pin DIP package.

As for R28 which is connecting across the output of the last op amp and ground, the schematic simply says "100". Could be iether 100 ohm or 100k but 100 ohm seems a bit low?

 

Upsate 260712. R28 confirmed to be 100k. 

 

 

 

EWS FD-1 Fuzzy Drive

 Based on Seamoon Fuzz (...and Black Cat OD-1). An op amp clipping fuzzy overdrive with an active tonec ontrol tacked at the end. Note that the schematic have a few typos; the 470nF caps is actually 47nF according to some gutshots but 470nF might work for the bass players out there...

 

 

 

Pearl PE-10 Parametric EQ

 Schematic is avaiable HERE.

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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 avaiable HERE.

 

 

 

Frantone Vibutron

 Per request. Included the "Rate mod", a switch that toggles between two speed settings..

Schematic and info HERE.

 

Blackout Effectors Blunderbuss Fuzz

 

 

 

 

 

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 is the first circuit follwed by the phaser.

Schematic is avaiable at Dead End Fx

 

 

 

 

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 layout below indicates. Do not proceed if you want a Mid control that is 100% identical to the stock ODB. I will update the the schematic and layout as soon as I can. Lesson learned, hesistant to trace from gutshots from now on...

Intended for bass but works really good for guitar as well. Based on OCD but tuned for more low end, headroom and gain. Treble and Bass controls is a passive James tonestack and Mid control is an active Bridged-T feedback control. Cut switch is Shelving filter for the first gain stage and Clip switch selects between assymetric MOSFET/Silicon, LED and none clipping.  Traced by AlexS and fuzzhead and the layout is verified. 

Two things, though. We couldn't figure out the value of the Treble cap in the James tonestack but values between 330pF and 1nF sounds good.

Also, the LTC1144 charge pump is only needed if if you want to run it on 18v to get a 36v swing within the circuit. They are pretty expensive and not that common. MAX1044 and ICL7660S can be used as well but the cut between pin 1 and 8 of IC2 must be omitted. Those charge pumps can only handle a maximum input voltage at 10v and 12v respectively so a 9v power supply/battery is higly recommended...