DOD FX10 Bi-FET Preamp

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Three 'original series' cosmetic variants of the FX10, from (left) 1982 rare foamer, (middle) 1983 "3 screw" and (right) 1988 "2 screw" with smaller knobs

The FX10 Bi-FET Preamp was derived from DOD's 210 FET Preamp and 410 Studio Bifet Preamp. Designed as a preamp for acoustic instruments (such as piezo-equipped acoustic-electric guitars), the FX10 can also serve as a "clean boost" pedal for electric guitar. Its Tone control allows either bass or treble boost, with the center position providing a flat response. The FX10 was one of the original ten DOD FX-series pedals that debuted in 1982, and remained in production through at least 1995.

• Controls: Tone, Level


• Catalog descriptions: 1984 1986 1991


• Manuals: circa 1983 (left) and 1990s


• List price (January 1983): $59.95


• Technical info:
  
  
  • Specifications (circa 1983): Input impedance = 4 M Ohms, Output impedance = 1 k Ohms; Gain = 0-6 V/V; Tone range = 0-15 dB
  
  
  • Official schematic provided with pedal by DOD (circa 1983)
  
  
  • Notable IC chip: One TLO62CP dual op-amp, with half used for the Level control (and functioning as a buffer) and the other half used for the Tone control; each control used its own J113 (or equivalent) field-effect transistor (FET)
  
  
  • Component-side circuitboard images: March 1983 May 1988
  
  
• External links:


• DOD FX10 Bi-FET Preamp at Effects Database


• FX10 Bi-FET Preamp at Noise Guide

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