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Catalinbread VariOboost
Here's an older design from Catalinbread, but an interesting design as usual. It's a preamp/boost with a wide range of tone shaping capabilities. Schematic can be found here.
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Apocalypse Audio Green Bomb Fuzz
For Fuzz Friday, here's a cool variation on the Fuzzrite circuit by Apocalypse Audio. It takes the classic Fuzzrite, adds some extra gain, and a pretty clever tone control. More info and the schematic...
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Darkglass Microtubes B3K
Gotten a few requests for this one and I finally got around to doing it. It's a bit of a hodge-podge–3 dual opamps, a hex inverter, and a JFET mu-amp array. Definitely not fitting this in a 1590B, but...
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Run Off Groove Nurse Quacky
Here's Run Off Groove's take on the Dr. Q by JD Sleep with mods and improvements suggested by Mark Hammer and Jack Orman. More info, schematic and sound clips here.
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Way Huge Pork Loin
Here's a really big one to kick off the week (might be the biggest dirt circuit I've ever laid out). The original Pork Loins have the Clean Tone, Presence, and Drive Mix pots internally, with 3...
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KMA Fuzzly Bear
For Fuzz Friday, here's an interesting take on the Bosstone fuzz with a few value changes, extra diodes, and a voltage sag control. Schematic and discussion here. I did add a bit of a mod to this–the...
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TAD Range King
Nice little booster from Tube Amp Doctor. There's still a little bit of confusion on FSB over the correct value of the resistors biasing the base of the transistor, but this should work. Schematic and...
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Run Off Groove Double D
Still a few Run Off Groove designs I haven't laid out yet, and this is one of them. It's based around the 4049 IC chip and features 2 channels of amp-like distortion. I've laid it out to fit in a 125B...
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Way Huge Fat Sandwich
"Way Huge" not only describes their enclosures, but also many of their circuits! Not quite as big as the Pork Loin, but still a monstrosity in its own right. 1590BB unless you wire all the pots...
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D*A*M Flesh Head
Here's a Tone Bender Mk. II variation from DAM for Fuzz Friday. Originals use PNP transistors are are positive ground effects, but it could be built with NPN transistors as well (negative ground). This...
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Barber Dirty Bomb
Gotten several requests for this one. Your wishes have finally be granted! Originals have the Sub Bass control as an internal pot, but it was pretty easy to include it externally, so you have options....
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Run Off Groove Mockman 2.0
Continuing to knock out the last few ROG designs I haven't laid out. This one's a pretty easy little circuit, emulating the distortion in Rockman amps designed an used by Boston guitarist Tom Scholz....
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EarthQuaker Devices Crimson Drive (3-knob)
What? A Monday post? Yep. This week is EarthQuaker week. EQD is easily my favorite pedal company, and I own more of their pedals than any other builder. Not to mention I've learned a lot about pedal...
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EarthQuaker Devices Dunes
If the Palisades is too much for you, the Dunes has a much smaller footprint and less controls to get distracted with. Pretty standard Tube Screamer clone with clipping options and a couple tone...
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EarthQuaker Devices Dirt Transmitter
To close out EarthQuaker week, here's the Dirt Transmitter. I traced this one myself and below is a video showing the process. It's similar to a Fuzz Face, but a little different. I found this...
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Optical Bypass
Here's another alternative to the 3PDT for bypass wiring. It's based on the method VooDoo Lab uses for bypass and uses a optocoupler to achieve true bypass using a DPDT. I've drawn up 2 different...
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Jon Patton Cardinal Tremolo V2
The Cardinal Trem is a harmonic tremolo designed by Jon Patton and meant to emulate the tremolo effect built into several Fender amps from the early 60s (Twin, Super, Pro, Showman, etc). What makes it...
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Toadworks Mr. Squishy
Here's an interesting take on the Orange Squeezer compressor from Toadworks. Extra controls and clean boost capabilities when the Squish control is at zero and the Level control is maxed. Schematic...
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Ibanez OD-850/Maxon D&S OD-801
There are a host of Big Muff clones and variation, but one of the most sought after clones is the Ibanez OD-850. Like all vintage Ibanez pedals, the OD-850 is just a rehoused and rebadged Maxon...
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Demeter Fat Control
Looking for a mid-range frequency booster? This one's apparently really good at it. Schematic and discussion on FSB here.
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