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RE: Toploads that bite
After last years SoCal Teslathon Scott Hanson had one end of a secondary and
I had the other end sitting on my shoulder. We got too close together and
POP-POP! A couple big static sparks jumped between us. It was loud enough to
draw attention and a few chuckles from the bystanders. This is a common
occurrence up here in the desert (very dry air).
Regards,
Brian Basura
-----Original Message-----
From: Tesla List [mailto:tesla-at-pupman-dot-com]
Sent: Tuesday, February 08, 2000 6:47 AM
To: tesla-at-pupman-dot-com
Subject: Re: Toploads that bite
Original Poster: Robin Copini <rcopini-at-merlin-dot-net.au>
Hi Ted,
Reply is - Ground Everything before touching it. I have a grounded
rod/brush on
the end of a 5 foot long pvc rod with closed ends. When I want to adjust
something I switch everything off, unplug it from the wall, wait for the rsg
to
spin down, ground the mmc, (even though it has bleed resistors), attach the
shorting cable across the mmc, ground the primary, ground the secondary
topload,
and then brush the length of the secondary with the grounding brush, THEN I
do
whatever it is I have to do. I do the same routine everytime, in the same
order,
never had a shock yet.
Best Regards
Robin in OZ.
Tesla List wrote:
> Original Poster: Ted Rosenberg <TRosen1-at-Tandy-dot-com>
>
> OK. If we accept that capacitance in the toroid, and the potential to have
a
> ...potential, then how do you assure that the charge is clearly drained
once
> you shutdown and before you adjust height or whatever?
>
> Ted
>
> Subject: Re: Toploads that bite
>
> Original Poster: Adam <adamsmith-at-mediaone-dot-net>
>
> on 2/6/2000 2:16 PM, Tesla List at tesla-at-pupman-dot-com wrote:
>
> > Original Poster: Ross Ogden <rossoggy-at-yahoo-dot-com>
> >
> > I was unfortuanate to get a static electricity shock
> > form the topload of my coil yesterday which felt like
> > the time when i discharded a crt to my hand. I got it
> > when i was removing it after a short run with the
> > mains off. Ive heard this happens to other people too.
> > It seems strange that about 15 Kv could build up on a
> > topload which has a electrical resistance of 32 ohms
> > to ground mesured(which proves there is no gap between
> > secondy terminal and topload).
> >
> > Could my shock of been because the charge built up on
> > me insted of the coil load. I was wearing rubber soled
> > shoes.
>
> The secondary coil has capacitance, and often holds a charge after a run.
> Many of us have been rudely surprised by this, and I've heard a few people
> have dropped their secondaries. :-)
>
> -Adam
> adamsmith-at-mediaone-dot-net