#1. The basic sixty cycle hum caused by single coil pickups.
#2. Humbuzz A caused by unshielded circuits
#3. Humbuzz B caused by inferior light dimmers.


How can we solve these problems?

#1. Use a dual coil system to neutralize external magnetic fields. Shielding does not reduce the hum.
#2. Humbuzz A can be eliminated by shielding with either coppertape or conductive paint.
#3. Humbuzz B can be only eliminated by shielding the circuit including the cavities below the pickup with aluminum tape.