RE: Resistors For Terry Filter

["Tesla list" <tesla@xxxxxxxxxx>]

Original poster: "Ian McLean" <ianmm@xxxxxxxxxxxxxxx>

Hi Daniel,

This question pops up from time to time on the list.  I thought I might have
a crack at answering this one for you.

Basically, you have the resistors in series with the high voltage outputs so
they are effectively floating at 6kV.  All they "see" is the voltage drop
across the resistor according to ohms law - in this case 1kR x whatever
current rating your transformer is at. For example V=IR so for a 30mA 
transformer that would be 1kR x 30mA = 30V assuming your
using the 1K resistors as in the Terry Filter.

Anyway you can see that the resistors are not stressed by the potential
difference across them.  As long as the resistors are long enough to prevent
arcs across them then your pretty much OK.

I am sure the gurus on this list could answer it better than me, but
just thought I might chime in :)

Regards
Ian

> -----Original Message-----
> From: Tesla list [mailto:tesla@xxxxxxxxxx]
> Sent: Friday, 6 May 2005 9:34 am
> To: tesla@xxxxxxxxxx
> Subject: Resistors For Terry Filter
>
>
> Original poster: "Daniel Koll" <dk_spl_audio@xxxxxxxxxxx>
>
> The resistors for the Terry Filter are only rated for
> 1000VAC.  How can
> they last in a 12KV+ situation?  I know most NSTs are
> secondary midpoint
> ground so each side sees 6KV (in a 12KV NST) but am I missing
> something
> else here?
> Thanks
>
>
>