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
> 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.
> 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