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Re: [TCML] ELECTROMETERS
I had several (fairly painful) shocks from my "Black & White" coil, several
10 minutes after operating it. My most plausible explanation of the effect
ist the one of "electret" effect, mentioned several times on this list (-->
archives!), and not something between earth and ionosphere. May be, the
formation of the effect is realized by coronal rectification, which you
mention in your posting, ant which is taking place in TC discharges. Please
see:
http://en.wikipedia.org/wiki/Electret
BTW: B&W secondary is insulatad by 10 layers of polyurethane.
Kurt
-----Ursprüngliche Nachricht-----
From: Peggy Day
Sent: Monday, June 04, 2012 3:17 AM
To: Tesla Coil Mailing List
Subject: Re: [TCML] ELECTROMETERS
I've experienced the same ever year when I run my coil outside during
Halloween. Currently, the coil I'm using has about a 1/4 inch of epoxy
coating the surface. Even after 1/2 hour or more after a Halloween run, the
static build-up on the surface of the coil can be startling, if you are not
prepared. This happens year after year, and is independent of what coil I
happen to run. I always find it a bit odd, given that the humidity around
Washington DC is usually fairly high. I would expect the charge to bleed
off quickly.
I always wanted to know if it was always the same polarity or if it was a
positive or negative charge. Possibly more important, why is there a
residual parasitic charge? I speculate that it is due to the fact that the
Earth is charged with respect to the ionosphere, though I suppose that it
could also be a residual parasitic charge resulting from coronal
rectification, whatever that is. I also wonder if other people experience
the same when they run coils indoors, or is this just something that happens
when outside?
Mike
On 6/3/12 5:09 PM, "Tesla" <tesla@xxxxxxxxxxxxxxx> wrote:
Yes a real phenomenon
Have received one good fright from static left on the surface of the
secondary after use. Left coil for 10 min before disassembly and got a
static shock off it after carrying it.
Secondary is coated with polyurethane and is on 25 cm PVC tube
ted in NZ
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-----Original Message-----
From: ED
Sent: Monday, June 04, 2012 1:42 AM
To: Tesla Coil Mailing List
Subject: [TCML] ELECTROMETERS
One of the subjects he
investigated was the charges left in the insulation on the surface of
TC's after operation and I'd like to repeat his tests.
SNIP
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