Best info I could find on this creamy classic fuzz goodie.
The 1967 John Hornby Skewes Zonk Machine II is an extremely rare, and vintage
pedal enthusiasts have long coveted both the original Zonk and its
successor, the Zonk II. The Zonk II was the result of a re-engineered
Zonk Machine I, which was based upon the Sola Sound MK I Tone Bender
circuit. Featuring (2) PNP M2N 4403 Silicon transistors, instead of the
earlier (3) Germanium transistor based Zonk Machine I, the Zonk Machine II is more stable,
smoother, and less dark sounding. Effectively designed to be a complete
and practical unit, the Zonk II’s predecessor was intended to be used in
conjunction with the JHS Treble Booster unit (essentially like a
Rangemaster) as to enhance the articulation and clarity of the otherwise
muddy Zonk. Interestingly, John Hornby Skewes did offer both units
within one box, and it was re-branded as the famous Shatterbox.
The rolled steel casing with a blue Hammerite finish is very
reminiscent in design to the gold MK I Tone Bender: with two basic
controls on top, and the input and output next to one another on the
back, the straight-forward aesthetic is a reflection of the absolute
perfect simplicity of the circuit within. It is loud, robust,
full-range, and complementary with most any rig. It is sweet, subtle,
and sings with sustain. Completely inspirational to play through, the
Zonk II offers endless enjoyment, and tone otherwise unavailable via a
reissue, clone, or kit.
Layout 1: Original PNP
Layout 2: Original NPN
