Let me start by I work for a phone company. I am getting a terrible AC hum on a bunch of my customers lines. I have tried everything I can think of with no help. I need suggestions because its driving me crazy.

Here the scoop:
Multiple subs in the same area with bad humming on lines. The hum seems to progressively get worse farther down the line. We talking about 3-4 miles from the CO. At about 3/4 miles the hum starts.

Tried multiple cable pairs
Pounded new ground rods at 17 peds along the way.
No load coils (Running off OCCAM blades)
Bypassed peds for a major part of the route with new cable on the side of the road. (Getting desperate!)
Isolated the suspected problem peds and eliminated with no luck

Also it should be noted when pulling off the bonds in the ped you get a spark.

HELP BEFORE I SNAP!

Splicing Tech