Re: TC & Lightning

["Tesla list" <tesla-at-pupman-dot-com>]

Original poster: "Ed Phillips" <evp-at-pacbell-dot-net> 

"Don't worry about the craze, Storms and lighting do have many AC
components,
10 mhz is one frequency that occurs during the entire lightning strike.
Adam"

	mhz or MHz?  One sounds a bit low and the other a bit high.  Without
lightning you'd be dealing with essentially a DC field of the order of
hundreds of volts per meter.  To the extent that the lightning stroke
discharges the cloud in the region from which it originated there will
also be a strong transient field change of the order of those same
hundreds of volts per meter with a time constant of the order of the
duration of the main current in the stroke, around 50 microseconds.
That's why simple devices can detect strokes many miles away using short
antennas.   Amplification of the transient "AC" voltage is simple.

Ed