Ibanez MT10 Mostortion

December 31, 2019, 6:30 am

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It's New Years Eve and time for the last layout of 2019 and I'm pretty sure it's the 800th on the blog! So here's the Mostortion. Why is it called that? The CA3260E opamp at it's core is MOSFET based. Unfortunately, this chip has been discontinued, so building a straight clone may be a little difficult, but a regular dual opamp like a JRC4558 or TL072 will work just fine as well. It's pretty similar to a TS10, just with a MOSFET chip and 3-band EQ, which is pretty handy. Schematic and more info here. Should be able to squeeze it into a 1590B.

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2020 Update

January 3, 2020, 6:30 am

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Update time! Check out the video:

Valentine's Sale!

February 13, 2020, 9:39 am

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Sale time! Get 20% of your entire order with coupon code "Val20" at check out over on the store. Code good now through Sunday.

BearFoot Fx Pink Purple Fuzz

February 14, 2020, 6:30 am

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Sneaky Fuzz Friday you probably didn't see coming! And on Valentine's Day too boot. See? I still love you guys. Here's Bjorn's Pink Purple Fuzz, a hybrid JFET, silicon, and germanium transistor fuzz. Schematic and discussion on FSB here. And don't forget about the sale going on over on the store. "Val20" at checkout gets you 20% off your whole order!

Note: I'm a bit rusty. I laid the whole circuit out before realizing the Nature pot wasn't centered, and still isn't on the perf side. So if you're building on perf, and board mounting that pot, you'll just need to angle it a little to fit to the drill template.

Ibanez NB-10 Noise Buster

October 15, 2019, 6:30 am

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Had a recent request for this one and thought it'd be a nice break from overdrives. Part of the Ibanez 10-series, it's a noise gate that utilizes the LM1894 noise control chip. You can still get the chip off eBay and the SMD version is available from Arrow, Mouser, etc. You can wire it for true bypass or if you want buffered bypass that option is available as well. Should work in either a 1590B or 125B. Schematic for reference.

8 New Projects in the Store NOW!

March 13, 2020, 11:36 am

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Dropped 8 new boards in the store this morning! Here's a quick rundown:

1) Truth Bender - hybrid silicon/germanium fuzz with gyrator EQ ala the Keeley Fuzz Bender

2) Cranky Speaker - a simple but awesome Electra Distortion variant

3) Transmogrifying Repeater - an original modulated delay built around the PT2399

4) Sunndering - Sunn amp emulating bass preamp with built in DI

5) SkeleKlone MkII - Simplified Klone now with clipping and fat toggles

6) Break Action - Dual Drive inspired by the JHS Double Barrel but with my own take on the TS and BB circuits.

7) Micro Buffer - Simple buffer circuit time cut your teeth on SMD

8) Darkmantle - Classic octave up tones in a small footprint, based on the Green Ringer.

JSA Ampldrive

March 25, 2020, 6:30 am

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Like many, I find myself working from home for the foreseeable future due to the COVID-19 pandemic. Most of my time so far has been trying to accomplish my day job in sweatpants and help my wife do hers (aka, kid wrangling), and I haven't had much time to build anything. But yesterday I did carve some time out to create today's layout. Shout out and thanks to Simon from JSA Effect Pedals for sharing some of his creations with me. Check him out on Instagram for build notes on this particular circuit. It's a pretty simple drive and should go together pretty quickly if you have all the parts on hand. And if you don't, he's got some notes on alternatives. Enjoy and stay well folks. Thinking of you all.

VFE Fuzz Duo

October 18, 2019, 6:30 am

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Happy Fuzz Friday! Here's a pretty cool Fuzz Face variant from an equally cool builder, VFE. Both transistors are switchable between silicon and germanium, and it's got a few other cool tweaks too. Schematic here for reference.

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EQD Black Ash

March 27, 2020, 6:30 am

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Hope everyone's having a safe and healthy Fuzz Friday. Found out the Black Ash had been traced and figured I'd draw up a layout. I figured it was a pretty straight Tone Bender Mk II clone, and it is with a simple tone control tacked on just before the volume pot. Was slightly surprised that it uses all silicon transistors. The resistors in the originals are old school carbon comps for the mojo. Here's the schematic for reference. You can probably get away with 4.7k and 47k resistors instead of the 4.6k and 46k resistors listed. Also alternatives to the 2N3903 would be 2N2222a, 2N2369, etc. Shoot for 100-150 hFE.

Quarantine Update

March 30, 2020, 6:30 am

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Made a video. Watch it here:

EQD The Warden

April 1, 2020, 6:30 am

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This one was due for a revision/redo. Optical compression with all the knobs from our favorite pedal slingers in Akron. Will fit nicely in a 125B with top mounted jacks.

Marshall Guv'nor

April 7, 2020, 6:30 am

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Here's another layout that needed a refresh/correction. Old layout was pretty trash and had a few errors which have all be resolved. Similar to the Blues Breaker (at least in circuit topography), but with a 3-band EQ and hard clipping. Bit more gain and distortion on tap. Here's the schematic for reference. Should fit nicely in a 1590B.

JSA MUR Fuzz

April 10, 2020, 6:30 am

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This week for Fuzz Friday here's another design from JSA. It's a Fuzz Face variant, with additional controls and an additional gain stage at the end. Should squeeze into a 1590B.

Double Llama

April 14, 2020, 6:30 am

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Had a request for 2 Red Llamas on a single board, and my initial reaction was, "Just build two," but since there are 4 unused hex inverters that could easily be used for a second Llama, my reaction changed to, "Why not?" lol Designed to fit in a 1590BB, but might fit vertically and sideways in a 125B.

Fortin 33

April 16, 2020, 6:30 am

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This one's a monster of a boost. Runs off ~36 volts, which is converted internally from a 9v supply (don't try and run it off a 12 or 18v supply or things will fry). Also make sure your electrolytic caps are rated at 50v for this one. Schematic found here. Forgot to put it in the notes, but the Out is from Volume 2.

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Death by Audio Sound Saw

April 24, 2020, 6:30 am

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Not quite a Fuzz Friday, but a Filter Friday I guess. Goes hand in hand with some fuzz though. The Sound Saw has two different passive filters selected by the Channel footswitch. The filters then share a 2-transistor gain recovery stage. Here's the schematic for reference. You can use a common cathode LED for the Channel switch or 2 individual LEDs if you prefer. See wiring diagram below. Laid this out for a 125B, but should be easy enough to adapt for 1590BB if you prefer. Will probably be doing a fabricated version of this in the near future as well.

Sound sample:

Hyper Fuzz regular and then the Sound Saw comes on

Clean guitar into Sound Saw changing tones

Bass Guitar into Suppa Tone Bender into Sound Saw

Bass Guitar into Big Muff then Sound Saw

Boss FZ-2 Hyper Fuzz

May 1, 2020, 6:30 am

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Happy Fuzz Friday everyone! The Hyper Fuzz is Boss's take on the Univox Super Fuzz with a load of modifications. Schematic for reference here. Fits nicely in a 1590BB.

Frantone Lo-Tone Classic Fuzz

May 8, 2020, 6:30 am

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Here's an interesting one from Frantone for Fuzz Friday. Think the first half of a Big Muff into an LM386. Schematic over on FSB here.

German Tooth Fuzz

May 15, 2020, 6:30 am

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If you've got a bunch of NPN germanium transistors kicking around, this Fuzz Friday's for you. Here's Zzoyd's adaption of the Basic Audio Spooky Tooth for use with germanium transistors. The first 2 stages each use 2 germaniums in a Darlington pair, with the 3rd stage using either a 2N7000 MOSFET or an NPN silicon transistor (pinout is CBE on Q5 if using a BJT in place of the MOSFET). Trimmers are for biasing the Darlington pairs, so adjust till it sound right to you.

SoloDallas Storm

May 22, 2020, 6:30 am

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Had a couple requests for this one. Very cool design and story behind this circuit. Note, the 120pF cap right below the Boost pot, and the 10uF cap just above the LED are present in the original design, but not connected. Check out Aion's trace blog for more info and schematic. Also, use the 1981 DRV drill template for this one.