Re: [TCML] Measuring Amperage in Neon Discharges.

["Bill Noble" <william_b_noble@xxxxxxx>]

I think the discussion is misleading.
see here http://en.wikipedia.org/wiki/Neon_lamp

in particular, please pay close attention to the second paragraph

some additional information of relevance is here:
http://www.intl-lighttech.com/applications/light-source-apps/neon-lamps/neon-lamps-index

or you may find this helpful
http://members.misty.com/don/dschlamp.html
--------------------------------------------------
From: "Henry Hallam" <henry@xxxxxxxxxxxxxxxx>
Sent: Sunday, December 13, 2009 6:33 PM
To: "Tesla Coil Mailing List" <tesla@xxxxxxxxxx>
Subject: Re: [TCML] Measuring Amperage in Neon Discharges.

> On Sun, Dec 13, 2009 at 12:26 PM, Harvey Norris <harvich@xxxxxxxxx> wrote:
> > Question; Can I simply put a common multimeter in series with a neon tube 
> > illuminated by a 30 ma current limited NST secondary, to record that 
> > secondaries amperage output?
>
> Yes.  Obviously be careful and treat the meter as "hot", i.e. don't go
> near it when power is applied.
>
> > Do I need a special digital meter to do this?
>
> No, an analog meter may even be better.
>
> > ...but where does the idea of a negative resistance occur, if these 
> > parameters show the the neon discharge resistance must be in thousands of 
> > ohms?
>
> The "negative resistance" refers to the local slope of the V-versus-I
> graph.  That is, for part of the graph, a small increase in voltage
> results in a small reduction in current, even though the overall
> current and voltage are both positive (and R=V/I is several thousand
> ohms, as you note)
>
>
>
> --
> Henry Hallam
>
> Sent from my Laptop
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