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Channel: Perf and PCB Effects Layouts
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Gretsch ControFuzz

September 9, 2016, 6:26 am
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For Fuzz Friday I give you the ControFuzz from Gretsch. Originals are pretty rare and it's an fairly unique design based around a single 4558 chip. I found a build report from LucifersTrip over on DIYSB, and he suggested a slight mod to the Distortion control that improves the circuit, so the layout below is based on that.



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Suhr Riot

September 12, 2016, 6:12 am
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Gotten a few requests for this one. The Riot distortion from Suhr is built around 2, dual opamps (4580 in originals, but others can be used) with several clipping options for a great high gain experience. You can pretty much use whatever diodes you want, but it's laid out for 2 LEDs always clipping, with the option of adding either 3, 1N4148s in asymmetrical orientation or 4, 1N34s in series. You can also try replacing D4 with a 1N4148 (I've included pads for that on the PCB), or changing the color of the LEDs. Really, just experiment with what you have on hand and chose what sounds best to you.


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Jen Harmon Booster

September 14, 2016, 6:21 am
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Here's a really unique overdrive from the Italian manufacturer Jen from the late 70s. Think Tube Screamer meets Big Muff. It sort of reminds me of a DBA design (only more stable and not as over the top) with a whole mess of transistor stages pushing a BMP style tone stack. Originals used BC318c transistors, but others in the 400-500 hfe range can be used. Here's the schematic for reference.


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Way Huge Swollen Pickle Mk I

September 16, 2016, 6:13 am
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For Fuzz Friday we have the original Swollen Pickle from Way Huge Electronics. One of the unique things about this Muff clone is the use of a quad transistor array instead of 4 individual transistors. This makes for a quieter pedal and more consistency in transistor matching. However if you don't feel like tracking down an MPQ3904 or NTE2321, you can use 4 individual transistors. Just note the pinout in the layout below.


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HAO Sole Pressure

September 19, 2016, 6:18 am
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Here's HAO's take on the Distortion +/250 Preamp circuit. It uses LED clipping and features a Brilliance switch for normal, bright, and warm settings. A TL072 dual opamp is used, but on the original, only one side is used and the other is left unconnected. In this layout, I used the unused opamp for the voltage divider to give more stability there.


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Taptation

September 21, 2016, 6:19 am
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Want to add tap tempo to a PT2399 delay? Using this chip from DIYSB and the layout below, you can add tap to any single PT2399 delay (Deep Blue Delay, Rebote, Faux Analog Echo, etc). The Pin 6 pad connects to the 6th pin of the PT2399, and the LED flashes at the rate of the tap.

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Equinox II Demo

September 22, 2016, 5:55 am
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Sorry this isn't a layout guys, but I made a quick little demo of the Equinox II reverb and wanted to share it with you all. Still really digging the sound of this thing and works really well with my smaller amps that don't have built in reverb.


A little info (maybe more than you asked for?) on the gear I used: the guitar I used started its life as a Gibson Melody Maker SG–one of those with the single bridge humbucker with the volume control and output jack on the pickguard. When I bought it the neck had a pretty substantial crack in it, so I picked it up pretty cheap. Fixed the crack and decided to turn it into a Junior with a P90 and more traditional control placement. It is very unnerving when you start routing on a USA Gibson, but it's turned into quite a player and I'm glad I took it under the knife.

Much less to say about the amp. It's a stock Vox AC4C1 in red. Got it at close out and it's a great little bedroom amp. A little boxy sounding on its own, but that's why I built this reverb!

The mic used was MXL 990 into a Zoom H4N recorder. Shot with a Canon T4i and I promise next time I do a demo I'll use better lighting!
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Durham Crazy Horse

September 23, 2016, 6:03 am
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For Fuzz Friday here's an really interesting circuit from Durham that's both an overdrive and a fuzz. As the name implies helps you get some Neil Young tones, but does a lot more than that. The input stage features soft clipping in the feedback loop of an opamp,  much like a Tube Screamer. The 2nd half of the opamp acts like a buffer, pushing a Fuzz Face-style stage. This then pushes another Fuzz Face-style stage that feeds into a Big Muff tone stack. The addition of the Volts control to starve the opamp of voltage makes this a really versatile pedal. I've laid this out with on board pots that will ideally fit in a 125B with top mounted jacks. Here's the schematic for reference.


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Catalinbread Supercharged Overdrive

September 26, 2016, 6:16 am
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Here's one of the earliest Catalinbread designs, the Supercharged Overdrive. It's a pretty unique circuit with the Contour control adding in more distortion and saturation from the CD4007 stage. Laid out for board mounted pots and will fit quite nicely in a 1590B. Schematic here for reference.



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CultureJam DuoVibe

September 28, 2016, 6:30 am
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Here's a cool vibrato effect designed by CultureJam and based on Tim Escobedo's Wobbletron. Here's what he had to say about it his original build doc.

The DuoVibe is a two-stage optical vibe circuit than can also cop subtle phaser tones. The LFO is modified from the Shoot the Moon tremolo (itself derivative of the Tremulus Lune) and is capable of triangle wave and near-square wave output. The pitch bend in Vibe mode is discernible but not capable of “seasick” wobble. With the depth cranked, you can think of it as a sort of “tremolo with funk going on” kind of thing. There is a Vibe/Phase Mode switch, the name of which indicates its function and purpose. This switch simply toggles a feedback filtering cap value, but is useful despite the simplicity.
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VooDoo Lab Superfuzz

September 30, 2016, 6:01 am
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It's Fuzz Friday once again, so here's the VooDoo Lab Superfuzz. Despite the name, it's not based on classic Univox fuzz circuit with the same name. Rather, it's a highly modified Jordan Bosstone with an added EQ section. One interesting thing about this one is the fact that Q2 (PNP) has the emitter going to ground, where every other version of the Bosstone has that transistor's collector going to ground. Maybe VooDoo Lab found some extra mojo by doing it that way? Schematic can be found on FSB. I've laid it out for board mounted pots and it will fit nicely in a 1590B.


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EchoPlex Preamp

October 3, 2016, 6:13 am
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The EchoPlex Preamp emulates the input stage on the old EchoPlex EP-3. It provides up to 11dB of gain and is mostly used as an always on pedal to sweeten the user's tone. If you want to add the volume control, use a 500k pot and connect lug 1 at the junction of the 100n cap, 220k and 100k resistors, and run lug 2 to ground. This also works really well when running at 18v. Schematic for reference can be found here.



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Mad Professor Little Green Wonder

October 5, 2016, 6:25 am
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I feel like in the past few months I've done a ton Tube Screamer variants. Well here's another one, but one of the more interesting ones I've seen. Bjorn designed this one for Mad Professor and utilizes a dual-gang pot for the Body control that affects both the treble and bass response. The IC was originally a LF353, but that was changed to the TLC272CP as it was more readily available and worked at lower voltages and breaks up easier. The only schematic I found online was a little difficult to read (it was hand drawn) so I've drawn that up in Eagle as well. Pots are board mounted and will fit nicely in a 1590B.




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HipKitty Oxblood Distortion

October 7, 2016, 6:07 am
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 Here's your Fuzz Friday fix. I'm calling it a fuzz anyway since it's just a modded Fuzz Face with an input buffer and a treble cut control at the output. It's supposed to give the boxy sound of a cranked AC15. Here's HipKitty's description:

The Oxblood Distortion was designed to emulate the tone and response of an old Vox AC15 with added gain at the input stage. Unlike other Vox-like pedals which emulate the tone and response of the Vox AC30, only the Oxblood Distortion emulates a boosted AC15.

Unique to the Oxblood Distortion is it's ability to make a "large" amp sound "small" and in hyper-drive with the tone of the AC15.

Also unique to the Oxblood Distortion is it's controlled output. While other distortion pedals use greater than unity gain at output to alter the user's amplifier input stages, the Oxblood Distortion does not. This keeps the true tone and response of the effect intact throughout the initial preamp stage of the amplifier in use.



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BearFoot FX Baby Pink Booster

October 10, 2016, 6:03 am
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Here's a cool little booster from Bjorn. Fairly typical JFET boost but the way the originals are wired, when the effect is bypassed, it's buffer. This layout reflects that original wiring, so wire the In pad to the input jack, Out pad to the output jack, and use a DPDT footswitch. If want to wire it for true bypass, jumper the 2 switch pads at the top of the board and omit the 150k resistor going from lug 1 of the Boost pot to ground. Or you can wire up a SPST switch to go between buffer and boost. Lots of options with this little circuit. Works well off 18v too.



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Menatone King of the Britains

October 12, 2016, 6:23 am
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Here's a Menatone design that emulates a Marshall JCM800. Like many Menatone circuits, the King of the Britains has had several iterations over the years. For this layout I went with the 6-knob version (and is essentially the same as the Electrictabs JCM800 emulator). I've laid it out specifically for a 125B enclosure with all the pots board mounted. Here's the schematic for reference. I would have liked to included trimmers for biasing the J201s, but there just wasn't enough room. So it's probably a good idea to socket the resistors feeding the drains and reference the schematic for voltages.


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Devi Ever Vintage Fuzz Master

October 14, 2016, 6:33 am
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Here's a cool one from Devi Ever for Fuzz Friday. The Vintage Fuzz Master is only slightly different than the Soda Meiser and both can be built on the same board. The only difference is the orientation of the PNP 2N2907A transistor. I've also included 2 switches for the Chaos and Noise mods. If you don't want to include the switches, just jumper the switch pads.


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Walrus Audio Mayflower

October 17, 2016, 6:02 am
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Here's the Walrus Audio Mayflower, which is essentially a hybrid between the Tube Screamer and the Timmy (which has its roots in the TS already). Originals use a second dual opamp for buffering the voltage divider, which in this instance seems to just be unnecessary, so I've omitted that.


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Valve Wizard Small Time

October 19, 2016, 6:21 am
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Here's Valve Wizard's take on the PT2399 delay. It's very similar to most PT2399 delays out there, with a dual op-amp providing input and output buffering. This was designed with the tails function and it uses Valve Wizard's usual J112 switching. Here's his original schematic and explanation of the circuit. You can also use a DPDT footswitch for bypassing, using one side to turn the delay on/off and the other for LED indication. I've included 2 extra pads on the PCB layout for this function. If going this route, don't populate the J112 along with the 1N4148 diode, 1k and 4.7k resistors, and 10µ capacitor round the J112.


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Death by Audio Robot

October 21, 2016, 6:06 am
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For Fuzz Friday, here's another wild and wacky one from DBA:

The Robot is a low fidelity 8 bit pitch transposer with absolutely no feelings what-so-ever. It is completely synthetic and transforms any input into a spuree of resynthesized robot jargon.

Originals need a dedicated power supply as the HT8950 chip runs off 2.4-4 volts and the power section of the original will not play nice daisy chained with other pedals. To make it a little more user friendly, I've altered the power supply to use a 3.3v regulator (LM1117V33C or similar, though watch the pinout). Here's my modified schematic:





Note: I've also included 4 extra pads on the PCB layout in case anyone wanted to do the mod lvlark describes here.
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