[Towertalk] Grounding mast to tower

[Pete Goudreau]

A question for the group:

How does one go about guaranteeing a good RF ground between a 
rotating mast and the tower proper?  I'm assuming that a thrust 
bearing isn't adequate, even a Rohn TB-3, but I'm sure I could be 
quite wrong.

Additionally, a lightning hit to an attenna or the mast would just 
arc across or flash ionize the air and form the conductive path to 
the tower in that manner, does this jibe with others' experience in 
these matters?

Thanks,
Pete, AD5HD