Parts To Build Your Own Guitar A guitar pickup is essentially just like an energetic microphone coil. For decades, energetic microphones have been wired with the voice coil mounted on the principal of the microphone's transformer, and maybe not called to floor (‘floating'). The microphone's case is usually connected to the cable guard, which is connected to the mike amplifier's ground (see Rane's website for more discussion).
By and large, active microphones are very quiet products consequently of the combination of transformer isolation and healthy, flying transmission lines for the duration of, in addition to shielded, humbucking coils.
So why don't you instruments? Instruments are notoriously overwhelmed by noise. Humbucking pickups are merely a partial (though essential!) solution. The obvious answer is to move the guitar collection to a healthy productivity, just like a microphone. A similar thought was printed that 2001 patent application like this Parts To Build Your Own Guitar?