HV Book (wasRe: Electrometer design) (fwd)

[Steven Roys <sroys@xxxxxxxx>]

---------- Forwarded message ----------
Date: Mon, 12 Jul 2004 08:29:26 +1200
From: Malcolm Watts <m.j.watts@xxxxxxxxxxxx>
To: High Voltage list <hvlist@xxxxxxxxxx>
Subject: HV Book (wasRe: Electrometer design)

On 10 Jul 2004, at 20:10, High Voltage list wrote:

> Original poster: Steven Roys <sroys@xxxxxxxx>
>
>
>
> ---------- Forwarded message ----------
> Date: Sat, 10 Jul 2004 08:31:25 +0930
> From: Matthew Smith <matt@xxxxxxxxxx>
> To: High Voltage list <hvlist@xxxxxxxxxx>
> Subject: Re: Electrometer design (fwd)
>
> Charles Brush wrote:
> > The design is incredibly simple.  Basically you have a little NE2
> > lamp in parallel with a capacitor with one side attached to ground
> > and the other to an elevated and sharply pointed rod.  As the local
> > field increases current will flow through the circuit causing the
> > cap to charge and periodically discharge through the NE2 causing it
> > to blink.  The faster it blinks the stronger the field overhead.  I
> > tried this a few summers ago but I can't remember the cap value I
> > used (anyone have suggestions?).
>
> This design (or one like it) is described in Iannini's "Building your
> own working fiberoptic infrared and laser space-age projects"  (the
> book with the long-winded name).  The capacitor value is given as 1nF
> @ 1kV.  Fig 14-12 on page 238 in my copy.
<snip>

Speaking of Mr Iannini, one of my colleagues spotted a new book by
him in our library the other day. It is entitled "Electronic Projects
for the Evil Genius" or something close to it. I had a quick browse
one afternoon. A lot of the projects rely on C-W multipliers run from
small inverters (all designs given!) and there were a couple of TCs
featured in there (nothing big and regrettably, at least one had the
primary cap wired across the transformer) but there was one glaring
omission from an otherwise excellent little book - no Marx bank!
Just about everything else you can think of was there.

Malcolm