Re: TC & Lightning

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

Original poster: "mercurus2000" <mercurus2000-at-cox-dot-net> 

10 megahertz
----- Original Message -----
From: "Tesla list" <tesla-at-pupman-dot-com>
To: <tesla-at-pupman-dot-com>
Sent: Sunday, July 25, 2004 3:23 PM
Subject: Re: TC & Lightning


 > 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
 >
 >