Exar OD-02 Overdrive

 Cool looking soft clipping overdrive using a discrete op amp setup.

Schematic is avaiable HERE.

Exar MT-1 Metal

 Might be something for the HM-2 fans? The gyrator frequiencies and Q's looks promising...

Schematic is avaiable HERE.

Exar DS-02 Distortion

 Schematic is avaiable HERE.

Exar HR-03 Hammer

 An old polish distortion which is based on Ibanez Trash Metal. Which is basically a  buffered and boosted Rat circuit with an additional fixed gyrator EQ stage after the distortion circuit.

Schematic is avaiable HERE.

MXR M109 Six Band Graphic Equalizer

 This one was an old request.

Schematic is avaiable HERE.

 

Great Eastern FX Small Speaker Overdrive

 Schematic Is avaiable HERE.

 

Missing Link Audio Eliminator Overdrive

 Schematic is avaiable HERE.

Pigtronix Bass Fat Drive

 Schematic is avaiable HERE.

Very close to the normal Fat Drive, just four cap value changes.

Smart People Facory Red Threat

 Schematic and info is avaiable HERE

 

 

Coron DC-808 Distortion III

 Schematic is avaiable HERE.

Tesla AYZ-025 Fuzz Wah

 There is a layout for the fuzz section in library but here comes the whole package with the inductorless wah circuit ryincluded. The wah pot can be wired as a manual panel mounted "bandpass filter" tone control or wired through an expression jack. The fuzz section is based on Foxx tone machine but there is quite a lots of changes along the signal path wiith different component values, a couple of buffer stages and negative feedback resistors. However, the Tone control match the FTM so feel free to adjust the 3,3nf cap for a higher value to bring up some mids.

 

 

 

Tesla AYZ-033 Overdrive

 Slightly modified. Stock units had two 741 op amps but the layout is modified for a dual op amp. A 1458 will do the same job as two 741s.

 

 

 

Yamaha NE-1

 Schematic is avaiable HERE.

Electro Harmonix Attack Equalizer / Knockout EQ

 Found this in an older folthe usuader that I forgot. Includes some necesarry modernazations like true bypass, onbard charge pump, input and output caps and pulldown resistors.

Schematics is avaiable HERE.

J Rockett Boing Reverb

 Schematic is avaiable HERE.

Electro Harmonix Bassballs / PedalPCB Lowballer Twin Envelepoe Filter

 It s time for a guest appearance!

Chris Stelloh of Capitalist Death Cult requested a layout for this one a while ago but I couldn't do it at the time so he went off and did his own. The layout is verified and good to go.

It is basically a EHX Bassbals with quite a few mods by PedalPCB. The internal trimpots are now extrenal pots. The Attack, Decay and the the distortion section are addons that wasn't included in the original Bassballs.

Caroline Guitar Company Wave Canon Mk.1

 A small break from the break...

 

 

 

 

And a short demo by Orion Tonehunt. 

 

 

Boss SG-1 Slow Gear

 Schematic is avaiable HERE.

 

 

 

EHX Muff Fuzz - Op amp version

 The last layout for a while, I honesly don't know when the next one will be uploaded, probably in january. There is three eye surgeries on the horizon...

Anyway, I had athe change to trace an old EHX Muff Fuzz of the op amp variety a few weeks ago. As you know, EHX used parts whatever they had on hand in the 70s so there is lots of different schematics online so I have included several options for some of the values.

My unit had a 1458 op amp, silicon diodes, 47nF for C1 and 100k for R7.

ProCo Fat Rat

 Pretty much a stock Rat with two additional switches. The clipping switch selects between the stock silicons and a assymetric MOSFET/Shottky pair. A Earlier units is supposed to have a 1N270 germanium diode in place of the Shottky  The Fat switch toggles between stock mode and Fat mode by adding a 6,8uF cap at one of the RC filters and a cap to ground at the gate of the output buffer.

 

 

....and a demo by MR. Ian Sheridan.