Re: The Geek Group High Voltage Capacitors, making a HV switch, (fwd)

["High Voltage list" <hvlist@xxxxxxxxxx>]

Original poster: Steven Roys <sroys@xxxxxxxxxx>



---------- Forwarded message ----------
Date: Sun, 05 Nov 2006 06:29:40 -0800
From: Jim Lux <jimlux@xxxxxxxxxxxxx>
To: High Voltage list <hvlist@xxxxxxxxxx>
Subject: Re: The Geek Group High Voltage Capacitors, making a HV   switch,
      (fwd)

At 07:50 PM 11/4/2006, you wrote:
>Original poster: Steven Roys <sroys@xxxxxxxxxx>
>
>
>
>---------- Forwarded message ----------
>Date: Fri, 3 Nov 2006 09:31:56 +1300
>From: m.j.watts@xxxxxxxxxxxx
>To: High Voltage list <hvlist@xxxxxxxxxx>
>Subject: Re: The Geek Group High Voltage Capacitors, making a HV  switch,
>       (fwd)
>
>Hi Jim,
>
>On 1 Nov 2006, at 22:12, High Voltage list wrote:
>
> > Date: Wed, 01 Nov 2006 16:53:22 -0800
> > From: Jim Lux <jimlux@xxxxxxxxxxxxx>
> > To: High Voltage list <hvlist@xxxxxxxxxx>
> > Subject: Re: The Geek Group High Voltage Capacitors, making a HV  switch,
> >       (fwd)
>
><snip>
>
> > 4) You can measure charging current by putting an AC Ammeter in the
> > PRIMARY circuit of the NST and calibrating it in terms of 
> secondary current.
>
>One presumes that by calibrating you include removing magnetizing 
>current from
>the final result?

Yes.. I started by making fullscale on the primary meter 
approximately right (with the secondary shorted through an ammeter) 
using a pot.  Then ran it down and did some spot checks and remarked 
the scale where necessary.

It's mostly to give a visual indication of whether you're charging or 
not.  I usually start with the variac low, then bump it up, wait for 
the current to drop, then bump it up again, repeating until I'm at 
the voltage I want.


>Malcolm