Hammond Xk 5 A electric guitar pickup is actually just like an energetic mike coil. For decades, active microphones have already been sent with the style coil mounted on the principal of the microphone's transformer, and not introduced to floor (‘floating'). The microphone's event is usually attached to the cable guard, that will be linked to the microphone amplifier's surface (see Rane's site for more discussion).
By and large, powerful microphones are very calm units as a result of the mix of transformer isolation and healthy, suspended indication lines for the duration of, in addition to protected, humbucking coils.
Therefore why don't you guitars? Instruments are once affected by noise. Humbucking pickups are just an incomplete (though crucial!) solution. Well-known option is always to float the guitar pickup to a healthy production, as being a microphone. The same idea was printed this 2001 patent software like this Hammond Xk 5?