Trex Power Supply A guitar pickup is basically similar to a powerful microphone coil. For many years, powerful microphones have been sent with the style coil attached to the primary of the microphone's transformer, and maybe not recommended to floor (‘floating'). The microphone's situation is normally connected to the wire shield, which can be linked to the mike amplifier's ground (see Rane's internet site for more discussion).
By and big, energetic microphones are extremely quiet devices consequently of the mix of transformer isolation and balanced, flying sign lines during, along with shielded, humbucking coils.
Therefore why not guitars? Guitars are once affected by noise. Humbucking pickups are only an incomplete (though crucial!) solution. Well-known answer is to float the guitar collection to a healthy production, just like a microphone. A similar strategy was published this 2001 patent application like this Trex Power Supply?