Gretsch Country Classic Jr A electric guitar pickup is essentially similar to a powerful microphone coil. For many years, powerful microphones have been sent with the style coil attached with the principal of the microphone's transformer, and maybe not recommended to soil (‘floating'). The microphone's case is typically connected to the cable guard, that is linked to the microphone amplifier's surface (see Rane's website for more discussion).
By and large, vibrant microphones are very quiet products consequently of the combination of transformer isolation and healthy, suspended transmission lines through the duration of, as well as protected, humbucking coils.
So why don't you guitars? Guitars are notoriously plagued by noise. Humbucking pickups are merely a partial (though important!) solution. The obvious option would be to float your guitar pickup to a healthy output, being a microphone. The same idea was published this 2001 patent software such as Gretsch Country Classic Jr?