Square Wave Oscillator

Came across this Instructable the other day and thought it would be a good addition to the library. Would be a good first step into the synth world and apparently plays nice with guitar pedals. Already built it myself and it works great, and fits nicely in a 1590G.

 

Lovepedal Zendrive 2

The Zendrive 2 is a big box version of the Zendrive, using a 12AX7 internally. Sadly the tube is only being used for clipping, replacing the BAT41 and 1N34a diodes in the small box Zendrive. But according to reliable sources, it sound very good, with some harmonic mojo happening. Other than the tube clipping, there's only a few value changes from the small box version. Schematic for reference.

zVex Machine

Happy Fuzz Friday! Not sure how I haven't laid this one out before. Think of it like a mashup of a SHO and Tim Escobedo's Tripple Fuzz, and then repeated. Here's the schematic for reference. This one was drawn up based on an early 2000s model and the input SHO section I've modified to the newer version with a single 9.1v zener to protect the MOSFET instead of 2, 1N4148s in the layout below. I also added a pulldown resistor at the output (cuz I couldn't make it fit at the input lol). The 2 clipping diodes aren't known, other than they are large blue glass diodes with the markings "BKC" written on them, so socket and experiment.

Inverting Phase Buffer

Got a request for a dual buffer that inverted the phase of the signal. Found this post from Parasit Studio and used it for the basis of this design. I added polarity protection, power filter cap, and output caps. You can use either dedicated jacks for the in phase and inverted phase outputs, or use a SPDT toggle connected to a single jack and use it to select between the two outputs. (In phase output pad to lug 1, output jack to lug 2, inverted phase output pad to lug 3.) Should prove to be a handy utility. Single and dual versions below.

Bearfoot Model H

Keeping it in alphabetical order, here's Bjorn's Model H. Similar to the Model G, but without the the "C" pot and a few value changes, it emulates the Hiwatt amps Pete Townsend used on Live at Leeds. Here's the schematic for reference.

BearFoot FX Model G

Today's layout is the Model G from Bjorn. It's a variation of the Honey Bee and aims to replicate the sounds of some classic Gibson amps from the 50s and 60s. Board mounted pots and should be an easy fit in a 1590B. Schematic over on FSB.

Keeley Rotten Apple

Happy Fuzz Friday, everyone! Here's another one of Robert Keeley's takes on the IC Big Muff with a quad opamp (the other being the Psi Fuzz). Pots are board mounted and it should fit into a 1590B.

EWS Tri-Logic Bass Preamp II

Here's a pretty simple but effective bass preamp from EWS. It's a 3-band EQ being pushed by a MOSFET gain stage. Looks like EWS made a version for Xotic with the same name. Not a lot different between the two other than some value changes laid out in this schematic on FSB. I've laid it out for a 125B with top mounted jacks. It runs off an 18v supply so use your favorite charge pump if you want to include that in the pedal.