Re: Nice big electrodes

• To: tesla-at-pupman-dot-com
• Subject: Re: Nice big electrodes
• From: "Kurt Schraner" <k.schraner-at-datacomm.ch> (by way of Terry Fritz <twftesla-at-uswest-dot-net>)
• Date: Sun, 28 May 2000 11:48:51 -0600
• Approved: twftesla-at-uswest-dot-net
• Delivered-To: fixup-tesla-at-pupman-dot-com-at-fixme

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
>

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