SKU: 36559129346
guitar pedal transistors

guitar pedal transistors ZO: Zonk Machine MK2 Silicon Fuzz Pedal | NOS Sprague 2N2926 Transistors

Sale price$26.12 Regular price$29.02
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Description

guitar pedal transistors ZO: Zonk Machine MK2 Silicon Fuzz Pedal | NOS Sprague 2N2926 TransistorsSOLD OUT IN 60 seconds thank you 14th June 2026 drop is 8pm (not 8am as mentioned in the last email ) sorry for any confusion Join the mailing list HERE to get notified of next batch drop This fuzz is my homage to the John Hornby Skewes MK2 ZONK MACHINE. Using my own tweaked version of the original Mk2 two transistor silicon Zonk circuit. Using a matched pair of super rare vintage 'New Old Stock' TO98 Sprague 2n2926 Gold Dot silicon transistors from

SOLD OUT IN 60 seconds 🙏🙏 thank you

14th June 2026 drop is 8pm (not 8am as mentioned in the last email )... sorry for any confusion

 

Join the mailing list HERE to get notified of next batch drop

This fuzz is my homage to the John Hornby Skewes MK2 ZONK MACHINE. Using my own tweaked version of the original Mk2 two transistor silicon Zonk circuit. Using a matched pair of super rare vintage 'New Old Stock' TO98 Sprague 2n2926 Gold Dot silicon transistors from the late 1960s

A mid gain super textured fuzz with octave overtones.

    • SWELL control (volume)
    • DRIFT control that mimics how old component values in original units may have 'drifted' up or down over the decades since they were made. This control acts a little like a fuzz and a little like a bias and give a wide range of really usable settings . Max isn't the only option here!
    • TEXTURE This is a pot to control the texture of the fuzz, it adds even more graininess - this reduces sustain and the note crackle, especially effecting the decay adding a much more 'crumbly' nature and more artefacts as the pot is turned anti clockwise.

Built using a very sort after vintage silicon transistors, and high spec new components. Built using JB and Vishay capacitors, Lumburg jacks and alpha pots.

AHHH Silicon ... I hear all the Ge nerds muttering. I can honestly say that with carefully chosen and measured components the actual differences between Si and Ge in this circuit are much more subtle than you would believe. Have a listen to the demo and see for your self...

I build these fuzz pedals in my garden workshop in Northamptonshire UK. This includes painting, drilling, and acid etching my design onto the enclosures. Constructing the entire circuit ‘Point to Point’ only using the components, there's no boards or circuit traces to dilute your signal purity. I finish the entire pedal to a standard that I think looks as good inside, as it sounds on the outside. It might be covered up but when you’re in that moment you KNOW the mojo you have under the hood.

Please be aware, these are totally hand built and so there might me some slight cosmetic variation between each pedal. The acid etching process produces a gunmetal patina on the enclosure with will vary from pedal to pedal. This is most noticeable on the sides and imparts a unique character to each pedal. Tonally, I play each one to make sure they sound as good as the first one, before signing off, no tone generator, no gadgets – just a telecaster and my ears.

Please note, all my silicon pedals have a boss style 2.1 center negative DC jack only, there is no battery snap. Silicon transistors are not sensitive to DC supply type unlike their germanium counterparts.

Thank you for reading, if you have any questions about this pedal feel free to message me.

RF interference - Many old fuzz circuits are vunerable to Radio Frequency Interference from a host of different modern electronic devices ranging from lighting to heating controllers to fridges. This is by the nature of the design and to reduce the chances of this happening would radically alter how the pedal sounds. If you are having problems with RF using one of my pedals here are a few resources that can help. RF interference is not down to a faulty pedal.

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SKU: 36559129346

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4.2 ★★★★★
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FINO
Los Angeles, US
★★★★★ 5
Big Improvement in Espresso Consistency
Color: Black
This WDT tool made a noticeable difference in the quality of my espresso shots. The needles are thin enough to break up clumps and create a very even coffee bed, and the distribution feels smooth and controlled. Build quality is solid, the handle feels comfortable, and it’s easy to clean. I’ve gotten more consistent extractions and better flavor since using it. For anyone looking to upgrade their espresso workflow, this is a simple but very effective tool. Definitely worth it.
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Reviewed in the United States on December 8, 2025
V
Verified Purchase
Vincent DiBona
Bozeman, US
★★★★★ 5
Impressed
Color: Black
I rarely give 5 star reviews. This product deserves it. A lot of thought has gone into the design. First, the material of it is quite good, metal. It has a contoured and knurled top for ease of use and good grip without being "grippy". The recepticle has little brushes inside which I think is unique to this product. Will those brushes created a problem in the future? I don't know. But there must be a way to clean out the coffee dust at some point. An air blower? Until now I had been using a home-made WDT with acupuncuture needles drilled into a cork. When I used the Nessus WTD I could immediately feel a difference as I stirred the grounds. While I have only made two double-shots so far, there was noticeably less channeling that I had before (I use a bottomless portafilter exclusively). Actually I had no channeling, but initially two streams that mergedi into one in about 3 seconds, so pretty good compared to what I had before. Nothing much more to say except the price was quite good compared to other WDT's. Even though I haven't used this product more than a few times, I can, at least at first blush, recommend it.
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Reviewed in the United States on February 9, 2026
T
Verified Purchase
Tony
Carnegie, US
★★★★★ 5
Works well out of the box, and better with a tweak.
Color: Black, Color: Black
This is a solid, well-made WDT tool that does exactly what it’s supposed to do — and gives you room to fine-tune it to your preference. The build quality feels good in the hand, and it works well right out of the box. A big plus is that it comes with extra needles, which makes it easy to change out bend needles or customize. I found that removing some of the needles actually improved usability for me. With all nine installed, it tended to push grounds around too aggressively. I’m currently running just 3 needles, and that setup works much better for gently breaking up clumps and distributing grounds without pushing or spilling coffee over the basket. Once dialed in, it’s been very effective and consistent. Overall, this is a great tool from TIVERAIN. If you like dialing in your workflow and want control over how aggressive your WDT is, this one is a great option.
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Reviewed in the United States on January 6, 2026
R
Verified Purchase
RonL_SFO
Belleville, US
★★★★★ 5
Works like it should, easier to use if you keep the dosing funnel on the basket
Color: Black, Color: Black
With a weighted top and storage base, this is sturdy metal with what appear to be standard acupuncture needles. It comes with a set of spare needles in a plastic tube. I find it much easier to use if I keep my dosing funnel on the basket, followed by a quick clearing of the funnel using a weighted espresso distribution tool with the maximum extension before popping off the funnel for my final tamp. See photo.
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Reviewed in the United States on March 11, 2026
S
Verified Purchase
Silma mora
Lowell, US
★★★★★ 5
Simple tool that makes a difference
Color: Black
This tool really improved my espresso. It’s easy to use and helps distribute the coffee evenly, which makes the shots come out better. It feels solid and well made. Small but very useful.
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Reviewed in the United States on March 18, 2026

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