[TowerTalk] Antenna/Tower Grounding (Lightning Protection)

[Gary Schafer]

> >  A common
> >direct stike is 100 kA with a risetime of 8 us, correct?
> 
> A more common waveform would be rise time of 2 microseconds, fall to
> 50% in 50 microseconds.  Typical average stroke is 20-30kA.  100kA
> would be a big-un

The industry standard for protection device comparisons is a waveform of
8x20 microseconds. You want to see how much energy is let through with a
given size strike with that wave form. If they don't tell you the let thru
energy, look to someone else.

However as Jim noted 2 microseconds is a more typical lightning rise time.

73
Gary  K4FMX