(1 customer review)


A moddable version of one of the heaviest, most iconic fuzz pedals in history.

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SKU: PCB-DF1 Category: Tags: , , , ,


The Derringer Fuzz PCB is based on one of the heaviest, most iconic fuzzboxes to ever exist—the Univox Super-Fuzz. There are certain circuits that are inextricably a part of the songs with which they were written. The Super-Fuzz is definitively one of them. The original had three controls: a knob for changing the texture of the fuzz (called “Expander”), another for the amount of volume (called “Balance”), and a switch for two different tonal voicings. It is an incredible, supersaturated, six-silicon transistor fuzzy beast of a pedal perfect for bass and guitar.

This circuit gets its name from the FreeStompboxes user Derringer, who made several excellent suggestions for modifications. This circuit replaces the original model’s switch with a Tone pot, which enables panning between two tone capacitors. Derringer also added two small-value capacitors at the first and last transistors, and encouraged experimentation with their values. You can find some of my own own findings and suggestions in the build document. There is also an internal trim pot for modifying the balance between transistors Q4 and Q5, in case you want to experiment with non-identical transistors.

In January 2021, I added rev2.2 of the Derringer Fuzz PCB to the store (this is the one in the featured image of this page; it kind of looks like a piano). This version includes some fun changes—most notably the two separate rows of transistors, for those who want to experiment with BCE-pinout transistors. It also externalizes the Brutal control, which effectively lets you modify the connection of the octave-up diodes to ground. I’ve also taken care to lay out the PCB intuitively, which lends to a faster and more enjoyable time building.

Note that this is the price only for the circuit board. You will need to source your own parts.

1 review for Derringer Fuzz PCB

  1. Colton Watts

    Holy cow!! What a great take on the Super Fuzz, and with well-written build documents that make the whole process a breeze. The tone knob is a welcome addition, along with the trimmers to adjust the amount of diode clipping and to “tune” how much octave there is. Turn the fuzz all the way up, set the tone in the middle, and rip some power chords. You won’t regret it!

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Return Policy

I gladly accept returns and exchanges.
Contact me within: 7 days of delivery
Ship items back within: 14 days of delivery

I do not accept cancellations on custom orders.
But please contact me if you have any problems with your order.

I cannot accept returns or exchanges for custom or personalized orders
unless the item arrives damaged or defective.

Conditions of Return:
Buyers are responsible for return shipping costs. If the item is not returned in its original condition, the buyer is responsible for any loss in value.

Shipping Information

Processing Time:
Depending on availability, the time I need to prepare an order for shipping varies. For custom builds, please allow 3-4 weeks lead time. For finished builds, please allow 1-2 weeks for processing.

Estimated Shipping Times:
Eco Post: 7–5 business days estimated distribution time for most destinations (see below), 10–12 business days estimated distribution time to Australia and Hong Kong.
Registered Mail: 4–8 weeks
I will do my best to meet these shipping estimates, but cannot guarantee them. Actual delivery time will depend on the shipping method you choose.

*** UPDATE***
Postal systems around the world appear to still be adapting to the global impact of COVID-19. This means that shipping times may be longer than we had previously been used to. I ask that you please be patient while we track the status of your package together.

Shipping Methods:
I ship out all pedal orders via Eco Post. This method is typically quicker than Registered Mail (advertised estimation is 7–5 business days, but due to the current situation has been known to take a bit longer, depending on the country), and it also features computerized tracking and proof of delivery.
This method is available in the following countries: Austria, Australia, Italy, Ireland, the United States, Belgium, Brazil, the United Kingdom, Germany, Denmark, South Korea, the Netherlands, Hong Kong, Greece, Japan, Norway, Spain, Poland, Portugal, Finland, France, Canada , Sweden, Switzerland, Thailand, Russia.

For PCB orders, you can choose between Eco Post and Registered Mail.

Customers living in Israel can arrange for Local pickup, just contact me for arrangements.

Customs and Import Taxes:
Buyers are responsible for any customs and import taxes that may apply. I am not responsible for delays due to customs.


Each Carcharias Effects pedal is hand-made by one person in his home workshop who loves making music, and making things that make music. Every purchase you make enables me to continue making more pedals, so your support is very much appreciated. That said, I take responsibility for the build quality of every pedal I make comes, and offer a 24-month warranty on each one, not covering normal wear-and-tear or abuse.

All the PCBs that I sell on this site were designed personally by me, but the fabrication is outsourced to third-party PCB fabrication services. Once they are designed, I order them in relatively small batches. I personally test every batch that I receive; however, as I am a strong believer in minimizing waste, there are cases in which I may sell perfectly functioning PCBs that might have some design flaw. I take responsibility for these design flaws (if any) and will specify their fixes or workarounds in the product's specific build document.

If you should encounter any issues with your product, please feel free to reach out to me via the contact form on this website. As I am based in Israel, I understand the inconvenience added by international shipping, and so I will be happy to assist in troubleshooting with you any problems before resorting to international shipping in case a repair needs to be made.