Re: NST useability (fwd)

---------- Forwarded message ----------
Date: Thu, 14 Oct 1999 08:48:36 +1200
From: Malcolm Watts <malcolm.watts-at-wnp.ac.nz>
To: Tesla List <tesla-at-pupman-dot-com>
Subject: Re: NST useability (fwd)

Hi all,
           "Low" voltage running is not as formidable a task as some 
seem to think it is.......

> ---------- Forwarded message ----------
> Date: Tue, 12 Oct 1999 08:34:12 -0600
> From: Travis Tabbal <bigboss-at-xmission-dot-com>
> To: Tesla List <tesla-at-pupman-dot-com>
> Subject: Re: NST useability (fwd)

> The NSTs you have a low voltage, but some of them may work. I know
> someone else on the net using a 9KV NST without problem. 7.5 may be a
> bit small, but it may work. 5KV is pushing it though. I would think
> you would have a hard time getting a spark gap to fire at that low
> voltage. But I've never tried it either, so it may work fine. The best
> thing to do is build the parts to take the higher voltages and give it
> a run on the lower voltage transformers if you want to know. Keep in
> mind that if you lower the voltage you shoud close up the spark gap a
> bit to make up for it.

I once got 12" from a 5kV 30mA transformer with a resonant-sized 
primary cap. It appears to me that running at lower primary voltages 
has its own benefits in that it allows the satisfactory use of simple 
gaps (e.g. a single static gap).  For reasons I am about to 
investigate it seems also that high Vp high Qp primaries demand 
multiple blown gaps, vacuum gaps, rotaries etc to prevent gap 
fizzing and pathetic outputs. Seems to me that stopping supply arcs 
in the gap is the real issue here but it needs checking out so I'm 
going to have a look with the storage scope in the weekend.