Mxr M234 Analog Chorus A electric guitar pickup is actually just like a vibrant microphone coil. For decades, energetic microphones have been sent with the voice coil attached with the primary of the microphone's transformer, and perhaps not referenced to floor (‘floating'). The microphone's situation is typically attached to the wire shield, that will be attached to the mike amplifier's ground (see Rane's internet site for more discussion).
By and big, powerful microphones are very calm devices consequently of the combination of transformer solitude and balanced, suspended sign lines throughout, as well as shielded, humbucking coils.
Therefore why not guitars? Instruments are once affected by noise. Humbucking pickups are just a partial (though crucial!) solution. The obvious answer would be to move your guitar collection to a healthy result, just like a microphone. The same idea was published that 2001 patent application such as Mxr M234 Analog Chorus?