RE: Terry's New Plane Wave Antenna

["Tesla list" <tesla@xxxxxxxxxx>]

Original poster: "Marco Denicolai" <marco.denicolai@xxxxxxxxxx>

Hi Antonio,

> -----Original Message-----
> From: Tesla list [mailto:tesla@xxxxxxxxxx]
> Sent: Tuesday, December 27, 2005 3:07
> To: tesla@xxxxxxxxxx
> Subject: Re: Terry's New Plane Wave Antenna
>
> Original poster: "Antonio Carlos M. de Queiroz" <acmdq@xxxxxxxxxx>
> <SNIP> I don't remember
> seing actual measurements of breakdown voltages with positive or negative
> voltages, that really don't have reasons to be different.

It is well known that breakdown voltage for positive discharge (and
rod-plane setup) is the lowest measured. That's why dielectric strength
tests (and papers) concentrate on that configuration. For example, for long
discharges the average field required is 4.5 kV/cm for positive polarity but
5.5 kV/cm for negative.

Inception voltage is another thing.

Best Regards