Tribute to Craig Anderton PUBLIC

Guitar preamp based on seven circuits by Craig Anderton.

Guitar preamp based on seven circuits by Craig Anderton used in-series to create a highly adjustable design. Primary Source: Anderton's book "Electronic Projects for Musicians" from Amsco Publications, 1980 edition (pages 67, 76, 92, and 126). Includes Input Buffer, Input Gain stage, Interstage Driver, Signal Boost Stage, Tone Driver, Tone Circuit, and Output Stage. Uses three dual op-amp ICs. Controls include: Input Level, Deep Fuzz Enable switch, Intensity, Bright Fuzz Enable switch, Bright Fuzz Treble-Boost switch, Tone Gain, Tone Selector switch with three positions (off, high, and low), two Tone Range switches (high and low) with three positions each, Tone Resonance switch (two positions), Tone Depth control, and output Volume. Range at or above 0 dBV is from 52 Hz to 22 kHz. Maximum gain = +17.4 dBV @ 815 Hz with all controls at 50%, or +70 dBV with all controls at 100%. Thus, the circuit becomes a high-gain overdrive when controls are set > 50%. Suitable for stomp-box or rack-mount applications. Batteries can be replaced by a regulated dual-polarity +-9V DC power-supply. And while the subcircuits are based on proven designs, and the overall circuit is simulator verified, treat it as experimental. Breadboard test before soldering.