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Re: Explanation of the positive E.S. charge
Ed wrote:
snip
>. It is really tough for any neon lamp about a TC to glow with
>> only one electrode ( DC) due to the huge RF fields about the system.
>These
>> are pure AC (two electrodes glowing).
>
>Put the neon bulb in a metal box (with viewing hole) and put a small
>capacitor across the terminals (it will then flash on one electrode).
>
>-Ed Harris
Ed,
With the neon and cap in the shielded metal box, are the neon's
terminals connected to anything or are they just floating?
RWW
2/7/96
Bob & Mark,
Ed Harris has made a super sensitive and robust electrometer by placing a home made (6" baggy and Al foil plates) 400 pF cap across a common Radio Shak neon. He has linear correlation of flashes/sec and voltage.
He is using it to measure corona, discharge polarities and voltages. Different polarities cause the neon electrodes to light differently. Cool, eh?!
He has taken a few hits form the guys with the $2500 Keithlys. "Can't measure Coulombs", etc.
NOW COMES this post as his rebuttal!!!
> >Subject: Re: Explanation of the positive E.S. charge
> It is really tough for any neon lamp about a TC to glow with
>only one electrode ( DC) due to the huge RF fields about the system.
>These are pure AC (two electrodes glowing).
Put the neon bulb in a metal box (with viewing hole) and put a small
capacitor across the terminals (it will then flash on one electrode).
-Ed Harris
WOW!
Question: How does the neon light in a shielded metal box and no
electrode connections? Is this a super simple scalar detector?
RWW