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Hornby Skewes Zonk Machine

April 28, 2017, 6:11 am
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The Zonk Machine was one of the many British fuzz boxes that came out in the mid-60s. Like the Tone Bender Mk II it was designed to compete with, it also was featured 3 germanium transistors but offered more of a boost and slight oscillation (in a good way). This is a positive ground effect so unless you use a charge pump or can make it work with NPN germanium transistors you can't daisy chain it with other negative ground pedals. If you are going the NPN route, be sure to rotate the polarized caps an the diode 180º. Here's the schematic for reference.


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Way Huge Green Rhino Mk II

May 1, 2017, 6:15 am
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Here's the newest version of the Green Rhino from Way Huge. It's similar to a Tube Screamer, but with a few extra stages and lots of modifications. I've laid it out for board mounted pots in a 1590BB. Here's the schematic for reference.


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Frantone Vibutron

May 3, 2017, 6:14 am
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Here's another one of my Eagle creations. The Vibutron is a great sounding tremolo from Frantone that uses a ICL8038 to produce the LFO. Originals use a rotary switch for selecting the waveform, but as lvlark pointed out on the Tagboard Effects blog, a on/on/on DPDT switch can be used instead (check out his layout for switch wiring). For you perf builders, this might be a bit difficult to translate to perf (especially with 3 traces under the 8038), but I'm sure one of you out there will make it work. :D This layout has also been uploaded to OshPark if you want a fabricated board–click the OshPark tab above.





Note: Red lines are jumpers
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Hornby Skewes Zonk Machine II

May 5, 2017, 6:18 am
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The Zonk Machine II was the more budget friendly version of the Zonk Machine. It was a simplified circuit and featured silicon transistors in place of germanium. Originals used 2N4061 PNP silicons, but other could be used. Because it's silicon based, it shouldn't be too hard to make the swap to NPNs so it can be daisy chained with other negative ground effects. I've laid out 2 versions of this, one for BCE pinout transistors (like the original 2N4061s) and one for CBE pinout transistors. The perf layouts reflects the original positive ground configuration, and the PCB layouts reflect negative ground configuration. Note that the 3.9k resistor isn't always necessary (it's there to make the Fuzz pot value 2k). Here's the schematic for reference.

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Black Arts Toneworks Black Forest

May 8, 2017, 6:17 am
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This is Black Arts' take on the Colorsound Overdriver. There are a few component value changes and 6 different caps on a 2 pole, 6 position rotary switch at the input. It's got a wide range of tones, and goes from boost to overdrive to fuzz. It's laid out for board mounted pots and would fit in a 1590B if it weren't for the rotary. If you wanted to skip the rotary and just use one input cap, just populate the capacitor you want and jumper its corresponding pad to the SwA pad.


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Auto Swell

May 10, 2017, 6:20 am
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Someone showed me this circuit and it's a cool addition to this library. It's an old project from Electronics & Music Makers magazine and allows you to ramp up and down your volume. It's not a true-bypass pedal, but essentially an always-on boost that increases your volume when the momentary footswitch is pushed. More info and schematic can be found in these scans:



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FuzzHugger FX Algal Bloom

May 12, 2017, 6:13 am
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Here's another cool fuzz from FuzzHugger for Fuzz Friday. The Algal Bloom is transistor based with a wide range of tones, from mild overdrive to full on fuzz. It has the Gain and Level controls you'd expect, along with a Bloom control (expands the fuzz tone), Clean (blend), and Power (voltage sag), along with 2 toggle switches for more things to tweak. Originals have the Clean control internally, but who doesn't love more controls? It's laid out with board mounted pots to fit in a 125B enclosure with top mounted jacks.


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BBE Boosta Grande

May 15, 2017, 6:14 am
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The Boosta Grande is a simple opamp-based boost that's pretty similar to the MXR Micro Amp. Only differences being where the pot is in the circuit and component value changes. Offers up to +20dB of boost. Should fit in a 1590A if you don't board mount the pot.


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Smallsound/Bigsound Sparkle Motion

May 17, 2017, 6:18 am
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Stumbled across this one on the old Smallsound/Bigsound blog. The Sparkle Motion is based on the classic Rangemaster treble boost, but with a lot of extra controls. Schematic and more info can be found here.


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Crazy Tube Circuits Starlight

May 19, 2017, 6:21 am
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Here's the Starlight fuzz from Crazy Tube Circuits for Fuzz Friday. Much like the Ziggy Overdrive from Crazy Tube, it's a string of FET stages in a row, only with a lot more them (and also some MOSFETs as diodes thrown in). It's laid out for board mounted pots and designed to fit in a 125B with top mounted jacks.


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EarthQuaker Devices Talons

May 22, 2017, 6:30 am
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A while ago I laid this out for board mount 9mm pots at the request of someone on FSB. Always intended to modify that original layout for use with more common 16mm pots. Turns out it was easier to just lay it out fresh. Anyway, the Talons is a very versatile OD with an active 3-band EQ, and can run off +9v or +18v power supplies.



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Run Off Groove Omega

May 24, 2017, 6:30 am
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Here's a nice little boost from ROG that originated from trying to design a FET-based Rangemaster treble booster. I've laid it out for a 1590a with board mounted 9mm pots. More info, schematic and sound clips can be found here.

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Black Arts Toneworks Revelation

May 26, 2017, 6:30 am
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For Fuzz Friday here's the Revelation from Black Arts Toneworks. There are 2 versions of the Revelation: the Super Bass and Super Lead. The Super Bass is a stripped down Pharoah without the tone control, no clipping diodes in the 2nd gain stage, and an input gain control. The Super Lead version is the same circuit, but with the values of the Black Arts LSTR.





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Jack Deville Deuce Coupe

May 29, 2017, 6:30 am
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Here's a modified version of the Deuce Coupe. It's an opamp based drive with a charge pump so the circuit runs off +/-9v. The originals have relay bypass switching and a boost function (that I've not included in this layout). You can probably fit it in a 1590B, but a 125B will be a little roomier.


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BMP Tone Stack

May 31, 2017, 6:30 am
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Had a few requests for adding a Big Muff tone stack to a few existing layouts. Call me lazy, but it's easier to draw this up than make a whole bunch of random alternate layouts. 😁  Anyway, it should be pretty handy. I've included a layout for just the tone stack, and one for the tone stack plus the gain recovery stage that typically follows the tone stack in a Big Muff. You can use different values for various responses (values listed in the image below).

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Emanating Fist Black Acid

June 2, 2017, 6:30 am
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The Black Acid is the big brother of the one knob Black Dust fuzz from Emanating Fist. It's a silicon Fuzz Face variant with a Drive control that pans between 2 input capacitors. It's laid out for board mounted pots and will fit nicely in a 1590B.


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Hell's Gain

June 5, 2017, 6:30 am
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Got a request for this one. It was designed by Haroldo Gamal and Leonardo Plautz Chocron. The Hell's Gain is a high gain distortion with an active 3-bad EQ. It's a big one that ended up with a lot of jumpers, but's fairly standard with circuit using a bi-polar supply. It'll fit in a 1590BB or you might be able to squeeze it into a 125B if you turn the board sideways. Enjoy!

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Diamond Compressor

June 7, 2017, 6:30 am
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Gotten several requests for this one and for good reason. It's probably the best optical compressor design out there. This one's not for the feint of heart, and will take up most of a 1590BB enclosure. 3 jumpers, but the pots are board mounted. The on/off indicator LED in the original is a bi-color LED that pulsates with the signal. The switches in the original are internal, but can be mounted externally for more control. Be sure to jump lugs 3 and 5 on the EQ switch. Here's the schematic for reference.


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4ms Noise Swash

June 9, 2017, 6:30 am
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Figured with all the big layouts this week, I'd better finish it off with another big one for Fuzz Friday. This one's great if you like flipping switches, playing with knobs and making a ton of noise. Not all that complicated really, just a lot of controls for tweak-ability. The original 4ms design says to use a switched pot for the Self Oscillation control, but you can use a regular pot and a separate SPST switch instead if you want. Here's the schematic for reference.


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Little Angel V4

June 12, 2017, 6:30 am
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Had a request for this one and ended up drawing it up in Eagle. Rick Holt (frequencycentral) over on DIYSB designed this chorus and this is the latest version. It differs from earlier version with 2 toggle switches: One changes the effect from chorus to more of a vibe, and the other changes the sound (Space/Warble). I've also uploaded this to OSHPark if anyone is want's a fabricated board of this one. Best fit will probably be in a 125B.


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