Group: alt.energy.renewable
From: Eeyore
Date: Thursday, September 13, 2007 6:05 AM
Subject: Re: Wind turbine 1000 feet away and on mountain top possible?



Vaughn Simon wrote:

> "Tim Neumann" wrote
> >
> > Skin effect is only for VHF and
> > higher - DC uses the whole cable.
>
> The high rise time of a lightning surge makes it act a bit like VHF. For
> this reason, when I build a circuit that is designed to exclude surges, I always
> include some inductance if possible.

Not like *VHF*. The rise time is NOT in the 10 nanosecond region.

I've seen figures in the microseconds mentioned. That makes it LOW frequency RF
(maybe even MF) but it's fast enough for inductance to play an important role.
/archive/articles/

Graham