Lightning (OT)

[Rick Jansen]

Well, computers are good for some things after all: for the working
of spark transmitters see: 

http://www.cinemedia.net/SFCV-RMIT-Annex/rnaughton/SPARK_SOUNDS.html

>From that page:
"the spark discharge was equivalent to the closing of an L-C-R circuit"

The page comes complete with formulas and diagrams (DIY!).

Rick Jansen


Rick Jansen wrote:
> 
> Tony Allgood wrote:
> >
> > But as for AC... the very large rate of change in the electric field due
> > to the strike generates very wide band AC in any conductor. I guess the
> > current generates a magnetic field too. Hence, the clicks, and spots you
> > hear and see on TV screens during strikes.
> 
> The discharge ionizes the air, making the discharge visible. Maybe this
> ionization causes the crackles and pops on TV and radio, not the current
> of the discharge itself? Marconi used a spark transmitter for his first
> experiments with radio using Rhumkorff induction coils? Was it the current
> of the discharge directly causing the EM waves? (Gee, as an EE I should
> know this, been playing with computers too long :-)
> 
> Rick Jansen
> __
> rja at euronet.nl    http://www.euronet.nl/~rja
> ____________________________________________
> S&H's a module and s&h's looking good

-- 
Rick Jansen
__
rja at euronet.nl    http://www.euronet.nl/~rja
____________________________________________
S&H's a module and s&h's looking good