On Thu, 25 Jul 2019 at 00:16, <geoelectron...@rallstech.net> wrote:

> G8WRB DE K0FF
> Sounds like a fun project.
>
> George


Unfortunately I couldn’t get anyone else at the radio club interested in
attempting this. I thought it might make a fun project.

A year or two ago I managed to get a few to build an electroscope. I am
unsure if mine was an electroscope or electrometer, as it could determine
the polarity of the charge. About 600 V was put was put across two
capacitor plates. The direction of travel would determine if the charge was
positive or negative.

One thing I did notice when building the electrometer was that it was very
easy to get the foil to touch one capacitor plate, be repelled the touch
the other plate. It was essentially doing what the Oxford Bell did, but
since I only had a piece of aluminium foil, it would have soon broke had I
left it running. The foil was short it run very fast - to fast to count the
frequency.

Dave.

Dave.
-- 
Dr. David Kirkby,
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