Feel free to investigate the PDF files below, which include helpful information in accompanying texts.
Put cursor at right edge to find click-and-drag button or enter page number at bottom of each file.
Contents: PDF 1: Example Op-Amp Circuits. PDF 2: Best Dual Op-Amp ICs. PDF 3: Diodes for Clipping.
PDF 4: Decibels in Audio. PDF 5: How To Get Fuzz/Distortion. PDF 6: Single-Battery Guitar Preamps.
PDF 7: Split-Supply Guitar Preamps. PDF 8: Soft-Clipping Fuzz Circuits. PDF 9: Hard-Clipping Fuzz Circuits. PDF 10: Assorted Guitar Circuits I. PDF 11: Assorted Guitar Circuits II. PDF 12: Tubulation: Distortion Circuit. PDF 13: Modified Pedal Circuits. PDF 14: Useful Circuits for Guitar.