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GREY ONE
V3

FEATURES
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2 layer PCB
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Dimensions (W=49.53mm x H=27.94mm)
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Board mounted pot design
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3PDT daughterboard incl.
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Multi version board
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Detailed printable PDF build docs
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Recommended enclosure 125B

GRV3

GRV3
1/1
Classic late 70’s op-amp distortion.
With it’s two-knob simplicity and popular sound, this pedal circuit is a favorite
of builders and players alike. Based on the original DOD 250 Overdrive / Preamp* schematic, the Grey One can be
built to the specs of the 1977-81 vintage grey box, an alternate “transition” version based on the early yellow box
models, and the MXR Distortion +*.
Price: $8.99
Available on Reverb
*Hammond Toneworks is in no way associated with Harman International Industries, Inc. or Dunlop Manufacturing, Inc.
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