RE: Capacitor Help

["Tesla list" <tesla@xxxxxxxxxx>]

Original poster: "Lau, Gary" <Gary.Lau@xxxxxx>

Not everyone connects the RF ground to the NST case.  Malcolm Watts in
NZ is a strong advocate of tying the mains-ground to the NST case.
Since no RF ground is perfect, there is high voltage hash present on the
RF ground.  Malcolm W reasons that if the case is at RF-ground and the
NST primary is at mains-ground (or neutral), the significant
differential there may stress the modest insulation between the NST
primary and the core. No 3-terminal safety gap is used to RF ground.
While a primary strike would in fact then be coupled to the mains, he
maintains strikes may be avoided by making the top load sufficiently
high.

I don't know how popular the two methods are relative to each other, but
I suspect the RF ground to the case is more widely used.  Both methods
have their plusses and minuses.

Regards, Gary Lau
MA, USA

> Original poster: "MalcolmTesla" <tesla@xxxxxxxxxxxxx>
>
> ----- Original Message -----
> From: "Tesla list" <tesla@xxxxxxxxxx>
> To: <tesla@xxxxxxxxxx>
> Sent: Saturday, December 17, 2005 7:13 PM
>
>
>  > Original poster: "Lau, Gary" <Gary.Lau@xxxxxx>
>  >
>  > Hi Christoph:
>  >
>  > If your NST has one side tied to case, you can't use a 3 terminal
gap.
>  > But regardless, I don't think the 3rd-wire ground should go to the
NST
>  > at all.
>  >
>  > When you say there one side of the secondary tied to the mains
ground,
>  > you mean tied to the case, right?  If the NST has a 3-wire power
cord,
>  > just disconnect the ground wire from the case, and don't use the
3rd
>  > wire at all.  Connect the RF ground to the case, and use a 2
terminal
>  > safety gap between the case and HV bushing.
>  >
>  > Regards, Gary Lau
>  > MA, USA
>
> That's the same thing Gerry was saying, remove the mains ground from
the NST
> and hook it up to RF ground.  Is this the "standard" way everyone does
it?
>
> Thanks
> Malcolm
>