Yeti Machine

The Rolls royce of Mk1 Tonebenders

Yeti Machine


The Zonk Machine was a short-lived Tone Bender MK1 derivative produced by a company run by an Englishman named Hornby Skewes. It's similar in sound to a MK1 Tone Bender, but some claim it sounded more complex and had a slight oscillation and octave effect to it to further the depth of the sound. 


Our rendition of the rare 1965 original Germanium versions features some modern upgrades, but retains the accurate sound of the originals. What started as a custom one-off for an industry friend turned into a full-blown product that features some amazing specs. We are extending the run and including more options due to popularity. 


There are four versions of the Yeti Machine currently available. They both feature high quality parts, the same enclosure, and the same classic, fuzz sounds. 


Option 1: Original Yeti Machine (Point to Point Zonk Machine)

Extremely high quality new as well as rare and high quality NOS components. Some effects makers claim "premium" parts, but we sought out the best that we could find for this circuit (this is not an overstatement). Not only is the sound as good as you can find, it's quiet, and built to last forever. Includes Dale military resistors, Real Alpha potentiometers, All NOS Ero Polyester Film, CDE Film/Foil, Rifa Film/Foil, and Kemet Mil-Spec Tantalum Capacitors, and Demont soft-touch mechanical true-bypass switching, made in Japan (literally the finest audio-grade mechanical switch you can buy). Each pedal is hand wired by Brian, meticulously tested, and true to the original Zonk sound.


Option 2: Point to Point Mk1 Tonebender

The same premium parts and PTP build as the Zonk Machine version, with slight circuit changes to be true to the original Sola Sound Mk1 Tonebender. The sound is similar, but with less sizzle and decay. 


Option 3: PCB Zonk Machine

The same exact circuit as the original Yeti Machine, but built on a Printed Circuit Board. All components are high quality (Wima and Nichicon caps, Xicon resistors, etc). The transistors are the same, but this one is cheaper because it's easier to build and the main parts aren't as rare. 


Option 4: PCB Mk1 Tonebender

The same circuit as the PTP Mk1 Tonebender, just built like the PCB Zonk Machine.


All versions include:


  • Switchcraft Jacks
  • Hand selected NOS Germanium Transistors (AC, Mullard, and Russian types)
  • Standard negative ground power--this pedal plays nicely with others! (there is an onboard charge-pump or NPN transistors are used)



We always recommend isolated power supplies. If you daisy chain effects on one supply, you may inject noise, ripple, ground loop hum, etc. This effect requires 9v, center negative power. In other words, the industry standard power supply.  



  • Top-mounted jacks, input on right, output on left
  • True-bypass stomp switch is on/off, indicated by LED
  • "Swell" controls the amount of volume
  • "Fuzz" controls the characteristic/prominence of the fuzz


  • Limited Availability
  • Delivery in 2-3 weeks



more pedals

Giganteum Drive
From $150.00 1
Old Growth Fuzz
From $160.00 1
Salt Water Fuzz
From $150.00 1
Yeti Machine
From $180.00 1