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Scuzz Box
This is a a second build of Distort-O-Matic XI from Stompboxology. Read more about the first version of the project here and here, and a demo. The first version of the PCB had a couple mistakes which I fixed with this board. I designed the board to fit a 1590B enclosure. In the first build […]
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Scuzz Box v1.1
This is a second version of the Distort-O-Matic XI from stompboxology. You can read about the first versions here, and here. Distort-o-matic XI is described as a distortion box with an aggressive tone control. In more concrete terms it’s a diode clipper and octave fuzz with with a two band active tone control 30db of […]
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Distort-o-Matic XI demo
This is an audio demo of the Distort-o-matic XI from Stompboxology. Check out my build page for a schematic and images of the finished project.
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Super-Fuzz V2
I updated the Super-Fuzz Board to fix a problem with the last version. The prototyping service at PCBWay.com is very inexpensive, which facilitates my workflow. The schematic I used for this project came from Freestompboxes.org. It’s based on the original with a couple mods. The Tone switch has been turned into a pot to provide a range […]
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Univox Super Fuzz
Super Fuzz is a circuit that has many variations. It’s one of the popular building blocks that has been used for decades. It’s built around a full wave rectifier that produces an octave fuzz sound. similar circuits that use the full wave rectifier: Super Fuzz Kay Fuzztone Univox Super Fuzz Honey Psychedelic Machine Third Man […]
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Bork Bork
Just built up a Bork Bork from Breakfast Audio. This is a clone of the Ibanez Wau Wau Fuzz. As far as I my “in depth” research can tell the Wau Wau Fuzz was originally a Fuzz and Wah in wah type enclosure. It had both a Fuzz and a Wah effect in the same […]
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Kay Fuzz Tone
Here is a kay Fuzztone clone. This is an octave-type fuzz that uses a full-wave rectifier. It is similar to the Super Fuzz and all its variants. The Kay Fuzz Tone uses fewer transistors than the Super Fuzz so you could think of it as a stripped-down and simpler version. The kay Fuzz Tone came […]
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Distort-o-Matic XI Stompboxology
Here’s another project from Nicholas Boscorelli’s Stomboxology newsletter: Going Discreet. Described by the author as: All-transistor distortion box with aggressive tone controls. Nicholas Boscorelli When I look at this I see a diode clipper similar to the Electra, DOD 250, MXR Distortion+, Proco Rat, and others, combined with a Super Fuzz octave Fuzz type octave […]
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Bobtavia analysis
This is a quick look at how the Bobtavia works. The Bobtavia is uses the LM386 to amplify the input signal. In the default setup the LM386 has a gain of 20. The output of the LM386 runs through a 220µ C4 cap into a small audio transformer. The input appears at one output of […]
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Bobtavia by Bob Starr
Bobtavia is an old-school DIY octave fuzz. It’s a lot like the Roger Meyer Octavia but uses an LM386 instead of transistors. The Bobtavia uses a transformer like the original Octavia and the Maestro Brassmaster. What’s nice about the Bobtavia is its simplicity. The whole circuit is just a handful of parts. This was one of the first […]
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Titan boost analysis
Here is a closer look at the Titan Boost by John Hollis. The circuit uses an op-amp to boost and buffer the input signal. This is fed into an inductor that steps up the voltage at the output. The amplifier is built around a TL072 dual op-amp IC1_A and IC1_B. The first stage, IC1_A, is […]
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New PCB day!
I have a few new PCB projects in the mail today. Flatline Compressor by John Hollis Titan Boost by John Hollis Tremolo-matic XXVIII from Stompboxology Distort-o-matic XI from Stompboxology Bobtavia by Bob Starr John Hollis John Hollis was one of the first people I ran into posting DIY designs on the internet. All of his […]