Circuitry of the Electric Guitar Eric Johnsen

The Magnetic Pickup  Voltage generator  Inductive coil around magnet Picks up fluctuations in the magnetic field from vibrating strings

Shielding  RF Noise  AC Mains Hum

The Humbucker  2 single coils  Wired electrically out of phase  Cancels interference

Controls  Pickup Selector  Volume  Tone

Tone  Harmonic Series  Resonance  Sustain  Passive Filters Inductive Components Capacitive Components  Loading

The Complete Circuit  Pick up  Tone controls  Cord  Load

Buffering  Impedance Matching  High Impedance  Unity Gain  Preamp / Distortion

Active Pickups  Piezo-Electric  Optical  Preamp

Summery  Single Coil vs. Humbucker  Loading  Active Circuits