NST protection

From:  Malcolm Watts [SMTP:MALCOLM-at-directorate.wnp.ac.nz]
Sent:  Thursday, April 16, 1998 2:42 PM
To:  Tesla List
Subject:  Re: NST protection

Hi Sulaiman,

> From:  Sulaiman Abdullah [SMTP:sulabd-at-hotmail-dot-com]
> Sent:  Thursday, April 16, 1998 4:29 AM
> To:  tesla-at-pupman-dot-com
> Subject:  Re: NST protection
> >From:  Malcolm Watts [SMTP:MALCOLM-at-directorate.wnp.ac.nz]
> >Sent:  Tuesday, April 14, 1998 5:13 PM
> >To:  Tesla List
> >Subject:  Re: NST protection
> First I'd like to thank all who contributed to the (hopefully)
> longer life of my next NST !, thanks guys.
> Malcolm,
> Thanks for the info, do you mean throw-out just the chokes,
> (keeping the 1.1 nF per leg to ground and 7k series resistors)
> or remove all devices from NST to safety and main spark gaps?

Just the chokes. But keep the wire running to gap as short as 
possible or you still have a small choke effectively in there.
> NST/rf filters store energy in parallel capacitors and series
> inductors, for the filter I made the discharge time is longer 
> than the calculated 'ringing-down' time of the primary resonant
> circuit (time to first null calculated based on k).
> Could energy stored in the filter make it difficult to quench
> the main gap at first null? Just curious if anyone has considered
> this already and has a simple answer. Bye ... Sulaiman

Ultimately it is preventing a power supply arc in the gap that 
necessitates quenching. Once the oscillatory energy has gone (from 
the secondary hopefully) the power supply is the only energy source