From time to time, I see or do something that renews my interest in lightning protection. For example, last week I was on my room tending to our TV antenna (it's reasonablly well grounded with #6 Cu wire going to opposite ends of the roof and then to ground rods which are also bonding to the electrical service ground.
Also, last week, I say three trucks of a nearby electrical co-op installing some blunt end rods on top of a series of power poles. The ground wire was below the 3 high voltage phase conductors.
I also glanced at a 100 year old (or so) patent by the great Testla. In the patent, Testla claims that pointed ground rods are a bad idea.
His "best idea" is having a "conducting cap" with rounded edges as the highest part of the structure. The cap would be separated from the grounding system by an "air gap." The idea seems to be that the capitance of the "cap" will let it soak up some charge and reduce the chance of a "streamer" starting a true lighting strike.
So: we have pointed rods, charge dissipators, blund rods, and insulated caps.
What works and what is nonsense?