[Elecraft] ESD and Storms

[Alan Fryer]

One of the worst shocks I ever got was off  the feedline on a big cubical
quad in a blizzard.  Made me forever respect static build up on antennas....

Alan, N3BJ

----- Original Message ----- 
From: "Bob - W5BIG" <W5BIG at comcast.net>
To: <elecraft at mailman.qth.net>
Sent: Monday, December 27, 2004 1:18 PM
Subject: Re: [Elecraft] ESD and Storms


> During a very light rain, with no accompanying lighting, there can be
static
> charge build up on an antenna.
> I've seen sparks about 1/4 inch across a ground switch that wasn't quite
> closed.
> Also, wind alone can build up a static charge.
> Rolling or unrolling coax can generate a static charge. I experienced
damage
> once with only a six foot length of coax.
>
> Always short a open transmission line before connecting it to your rig.
>
> 73/ Bob - W5BIG
>
>
>
> ----- Original Message -----
> From: "Dave G." <dmg at bossig.com>
> To: <elecraft at mailman.qth.net>
> Sent: Monday, December 27, 2004 11:07 AM
> Subject: [Elecraft] ESD and Storms
>
>
> > Just to add to the knowledge base...
> > One misconception is that, if  was no storm, there was
> > no lightning...
> >
> > At one point in my career I had the fortune to do some
> > work at NASA, and came across a nice piece of
> > research concerning Clear Air Lightning.
> >
> > Lightning can and does occur on perfectly clear days. At
> > MSFC (Huntsville,AL) there have been recorded in
> > excess of 1000 CAL strikes in one day. !!
> >
> > Caveat !!
> >
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