[jason]

In article a6bcdc6b-c219-40f3-82d4-0156e6b426f1
@googlegroups.com, says...
Few mics have hum bucking coils fitted, suggesting that most users regard it as a non problem and simply move the mic away from the hum source.

Some of the Rode mics, particularly those for on-camera
mounting, have humbucking coils.