Thursday, January 5, 2023

ETI: The Fuzztone, a Dan Coggins Design

The Fuzztone is an early design of Dan Coggins before Lovetone or Dinosaural appeared.  

The first publication in ETI (Electronics Today International magazine) actually had an error on the schematic - it wasn't critical, as it just changed the frequency response a little, and it lost some level along the way in the filter section.  Remember that ETI supplied a PCB for the project, so it would have sounded right.  

You can find the corrected schematic and a few words from Dan here.


ETI, DAN COGGINS THE FUZZTONE - VERO LAYOUT

ETI DAN COGGINS THE FUZZTONE - VERO LAYOUT FOR DIY GUITAR FX PEDALS

FUZZTONE ON LTSPICE

I've not built this yet, but it looks like a distortion/overdrive with a mid-hump and not much top-end on LTspice.

ETI FUZZTONE SCHEMATIC

This is sweeping both the sustain and filter pots from 0 to 50% to 100%

FUZZTONE ON LTSPICE

FUZZTONE ON LTSPICE

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