Black Cat OD-1

 Did this one quite a while ago, but wanted to redo some of the old layouts with board mounted pots. The schematic online has the topology correct but the 100nF caps are 47nF from the gut shots I've seen, so that's reflected below. Might be good to socket and experiment with.

Greer Amps Black Mountian

 Here's one of Greer's latest offerings. Seems like a simplified OCD circuit with some value changes and different clipping diodes. Schematic for reference. Easy fit in a 1590B.

Exar OD-2

 Here's a fairly unique OD from the mid-nineties and the Polish pedal manufacture Exar Electronix. It's a soft clipping drive based around a simple discrete opamp topography. Originals have J113 JFETs, but others should work just fine. More info on FSB.

Sarno Earth Drive

 This one's gotten a fair amount of hype over the years. It's essentially a Timmy without the bass control and a few different values. The IC and clipping diodes haven't been confirmed, other than 2 silicon, 2 germanium. 1N4148 and 1N34A should get you pretty darn close. IC is just a dual op-amp so socket and audition your favorites. Schematic here for reference.

DigiTech Bad Monkey

 With all the recent talk and hype of the DigiTech Bad Monkey lately, and the sky rocketing prices of them on Reverb, a layout seemed to be in order. I used to gig with one of these and loved the Low control on it. Helped it stand out compared to other TS-style ODs. So it's worth throwing together in my book if you can't wait for prices on original units to come back to reality. This one's laid out for a 125B with top mounted jacks but you can probably squeeze it in a 1590B if you feel so inclined. Schematic over on FSB.

J. Rockett Tim Pierce Overdrive

 Thought this one was interesting so I gave it a go. It's a fairly typical Rockett overdrive (.45 Caliber, Animal, Blue Note, etc.) with a fairly typical MOSFET boost (AMZ Booster, EQD Black Eye, etc.). Fits in a 125B with dual footswitches. Schematic and discussion found here. Fabricated version available on the store.

Solid Gold FX Super Drive

 Here's an interesting take on the classic DOD 250/MXR Distortion + circuit. It's pushed by a simple BJT boost and has an added presence control and tone switch. Schematic here. Easy to fit in a 1590B or 125B.

Rift Amplification EL34

 Almost didn't draw this up since it's just another Electra variant, but they almost always sound good, so why not? This one claims to emulate the sound of EL34 tubes, which sounds like marketing gibberish to me since it's just a diode-less Electra. Originals are all hand wired, point to point, floating in the 1590BB enclosure. Super cool looking, but a major labor of love to produce, hence its hefty price tag. This will fit in a 1590B, but has 2 footswitches, so the drill template reflects a zVex-style of layout. Schematic and cool teardown vid on FSB here.

Greer Amps Soma 63 Preamp

Cool JFET preamp circuit from Greer. Its supposed to sound like a Brownface-era Fender amp. I'd be curious what it sounds like without the transformer. Should fit just fine in a 125B with top mounted jacks. Schematic for reference.

Earthquaker Devices Special Cranker

Here's EQD's newest offering, the Special Cranker. Developed from the Speaker Cranker, this one is like two basic Electra's with switchable hard clipping diodes in between (1N60Ps like the original Speaker Cranker or Soviet germanium D9Ks). Easy fit for a 1590B.

Here's the schematic for reference.

Normally I throw a demo in, but just go look those up on YouTube, there's a bunch of them. I leave you with this vid instead. It's waay cooler anyway.

MI Audio Blues Boy Deluxe

 Stumbled across the schematic for this one over on FSB and it seemed interesting enough. Should be able to squeeze it into a 1590B. 

PedalPalFX PAL 800

 By popular demand, here's the PAL 800, a well regarded Marshall-in-a-box circuit. Should fit nicely in a 125B. Schematic here. All the trimmers except the one just below the Volume control are for biasing the JFETs. Start at 4.5v on the drain of each JFET and adjust by ear from there. The other trimer is for smoothing out the output signal.

Greer Amps Southland

 Turns out the Southland is pretty much the same circuit as the Lightspeed, but with some hard clipping diodes thrown in the middle (and a couple value tweaks). Figured I'd make a new layout with space for the diodes. This layout uses the same drill template as the Lightspeed.

I ended up building a 2-in-1 with this and a Lightspeed and highly recommend it. If you'd rather a fabricated board, check out the LightLand on the store.

Lounsberry Nigel

Here's a transistor based overdrive I came across on FSB. Demos sound interesting, so give it ago. Easy fit in a 1590B.

Greer Amps Tomahawk

 Here's a popular drive box from Greer Amps. It's essentially a Distortion +/DOD 250 but with a modified gain control, LED clipping and a treble cut pot. Should be an easy fit in a 1590B.

Hudson Electronics Sidecar

 Here's a really great sounding overdrive from Hudson Electronics. The Sidecar is loosely based on the Tube Screamer with a 2-band Baxendall EQ and some interesting soft clipping. It uses a PNP germanium as a diode along side an LED and a 1N4148 in an asymmetrical configuration. I've got a fabricated version available in the store as well if you prefer and the schematic is over there in the build doc. 

Way Huge Red Llama 25th Anniversary Reissue

 Happy New Year, everybody!  This one recently got traced over on FSB. The 25th Anniversary edition of the Red Llama has an added hi cut tone control, but also has a few variations from the original circuit. The hi cut itself is just a basic cap/pot to ground tone control, the minimum gain resistor on the first stage has been reduced from 100k to 91k, and the 2nd stage feedback loop resistance has doubled up from 1M to 2M. Schematic and more info on FSB.

Dirt Master

 Here's a little something I whipped up the other night on a whim. Actually built it on the fly before I even drew up a layout. I was trying to build something with some old mojo caps I found on my bench, and it initially started as a treble booster, but I ended up wanting more gain. Initially it was based on the EQD Arrows, but added an extra cap off the emitter (ala the Rangemaster) for more gain and snarl. I used a germanium transistor with an hFE of around 230. Worked well with a silicon transistor as well. Room for experimenting with the input and output caps. Should fit easily in a 1590B. 

Mad Professor Simble

This is been traced for a few weeks now over on FSB and I've meant to lay it out since then, but just now getting around to it. If you don't know, it's an amp-in-a-box type trying to emulate a Dumble amp. Apparently it sounds very good with smaller amps. Should fit nicely in a 1590B with board mounted pots as per usual.

Double Llama

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.