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Keeley 4-Knob Compressor
The Keeley 4-Knob Compressor is a modified Ross Compressor and is highly regarded in the stompbox world. It's only down side is the use of the obsolete CA3080 chip. These can be hard to find and a...
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555 Relay Bypass
I know there are a bunch of you out there who like your 555 timers, so this one's for you guys. This relay bypass uses a 555 as a bistable flip-flop combined with a simple relay trigger designed by...
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One-Knobber Project
I haven't made a detailed project in a while, so for Fuzz Friday here's the One-Knobber. It's based on the old Dr. Tony Balls stripboard layout that covered the ColorSound One-Knob, D*A*M Meathead and...
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CMAT Mods Butah
Here's a Blues Breaker variation from CMAT Mods. Seems to be a blend of the original and second versions of the Blues Breaker. Originals use a 1N4148 for polarity protection, but a 1N5817 would be...
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Rebote Delay - 1590A
For those of you who didn't want 1590A week to end last month, here's another mini layout for you. It's an early iteration of the Rebote Delay that features a simple JFET stage at the input, followed...
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MojoHand FX Iron Bell/Skreddy P19
For Fuzz Friday, here's another Big Muff based circuit to add to the collection. The Iron Bell is a variation of the Skreddy P19, the schematic of which was graciously posted by Marc from Skreddy a few...
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Catalinbread SFT
Here's a really versatile overdrive from Catalinbread. The SFT is based on Ampeg amps from the 70s, using JFETs to simulate tubes (like many of Catalinbread's other overdrives). The Stones/Stoner...
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Fulltone OCD
I've been meaning to redo the OCD with proper board mounted pots, so here it is. It's a development on the Voodoo Labs Overdrive, with MOSFET clipping and a simple tone control. Fulltone has made a few...
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Keeley Psi Fuzz
Happy Fuzz Friday, everybody. The Psi Fuzz is an IC/germanium hybrid fuzz. It takes some inspiration from the IC Big Muff, but with Keeley's own distinct design touches. Schematic can be found here.
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Fulltone Fulldrive 2
I got a request for the Fulltone Bassdrive, and upon examining the schematic for it and the Fulldrive, there's only a few capacitor value changes between the two, which I'll detail below. All that to...
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Lovepedal Delux 60 Mosfet Boost
Hadn't done a boost pedal in a while and hadn't done a Lovepedal pedal in a while either, so I'm killing 2 birds with one stone. The Delux 60 uses a Mosfet gain stage set to give clean boost or to push...
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Harmonic Percolator
Here's the mythical Interfax Harmonic Percolator for Fuzz Friday. It's a pretty unique circuit design and uses germanium and silicon transistors. Here's the schematic for reference.
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Roger Mayer Voodoo-Bass
Got a request for this one. It's the bass version of the Voodoo distortion. It's a very popular bass effect, especially in Japan apparently, but also sounds great with guitar too. A transistor stage at...
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Death by Audio Fuzz War
For Fuzz Friday, here's the original Fuzz War from Death by Audio. It's essentially 5 gain stages going into a Big Muff-esque tone stack, into a clipping stage and a final gain stage. Here's the...
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Nobels ODR-1
Got a request for this one. It's an interesting variation of the Tube Screamer circuit, but with a lot of changes and modifications. There's an optional boost switch you can include if you like that's...
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Smallsound/Bigsound Mini
Here's a pretty versatile and unique overdrive from Smallsound/Bigsound. The designer, Brian, was kind enough to share his schematic over on FSB, so a big thanks to him! I've laid this out for board...
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Ampeg Scrambler
It's Fuzz Friday time again, and this week I give you the Ampeg Scrambler. This one's a pretty rare one, even back when it was originally made in the late 60s. It's a pretty crazy octave fuzz with a...
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JangleBox
Here's a cool variation on the MXR DynaComp. Apparently it's well loved by Rickenbacker players for adding even more Byrd-like jangle to their tone. It's laid out for board mounted pots and you should...
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Walrus Audio Deep Six Compressor
Apparently it's going to be a compressor week. It came to my attention that my original schematic and layout for the Deep Six had a few errors. And since I want to build this one myself and my dislike...
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EHX Satisfaction Fuzz
It's Fuzz Friday once again and this week we have the Satisfaction Fuzz from Electro Harmonix. It's essentially a Jordan Bosstone without the clipping diodes and a smaller output capacitor.
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