[Prev][Next][Index][Thread]

Re: Nice big electrodes



Hi Richard,
me too... was delighted to find these balls. I discovered them
(with spark gaps in mind) in some flea-markets about a year ago,
where occasionally I buy them for ~8 SFr(4.5$) the pair. They are
great for safety gaps, or even for a rough mesuring gap for HV
(for 5cm balls you can find tables of voltage vs. spacing). I
drill M3 screw threads into them for mounting. The chromium
plating deteriorates soon, if you apply "power arcs". ...Yes, I
think it's something brilliant !  ;^)

Kurt


Tesla List schrieb:
> 
> Original Poster: "Richard Barton" <richardbarton-at-caving5.freeserve.co.uk>
> 
> I've found a great source of big fat spherical metal
> electrodes. They are steel, chromium-plated, and
> between 1.5 inches and 2.5 inches in diameter,
> heavy and hollow. You can drill a small hole in them
> and secure them to apparatus with a self-tapping
> screw.
> What are they ?
> So-called "Chinese Finger Balls"..... or similar names,
> they jangle, and are supposed to be therapeutic and
> you can buy them in those shops that are full of
> aromatherapy stuff and souvenirs. The assistant was
> taken aback when I bought 20 of them.
> Anyone else tried them or have I discovered something
> brilliant ?
>                                 Richard Barton
>