I'm using tin then at the end of the tower I have a MV transformer like he has, turning the ULV-current into Mv to reduce the amount of packets. After the transformer its glass fibre, down to my
Actualy my MV transformers get ULV packets and transform into HV packets (by redstoning it with a lever).
And can you take a screenshot of your tower?
Probably you either obstructed your tower too much, or placed highest wind mill at wrong height.