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

Re: Safe parameters for stupid human Tesla coil stunts

Original poster: "Black Moon" <black_moons@xxxxxxxxxxx>

Yes, let this be a lession to allways make sure your HV wire is high freqency rateing if your going to use it as such, Example: I had a flyback, with the diode attached, it would'nt really do anything to the 6 layers of electrical tape I tested with at 10kv
at 20khz ac, an arc actualy shot to the electrical tape on both sides, and spread out like a little flat ball, in about 30 seconds the tape arced though, I bet if it was 60hz however it would of standed up to it for a few mins. (Yes i realise 6 layers is extreamly underrated for 10kv, and probley would arc though with DC sooner or later, but my goal was to see how diffrent freqencys affected breakthough)

From: "Tesla list" <tesla@xxxxxxxxxx>
To: tesla@xxxxxxxxxx
Subject: Re: Safe parameters for stupid human Tesla coil stunts
Date: Sat, 25 Dec 2004 19:12:02 -0700

Original poster: Sue Gaeta <sgsparky@xxxxxxxxxxx>

Hi,
It's probably more likely due to the the small capacitance formed by your hand, the conductor, and the insulation on the wire. This is nothing at 60Hz, but if you start playing with H.V. inverterters that use much higher frequencies, more current is transferred and the effect becomes even greater. I have had silicone insulation rated for 75KV actually break down with only 5KV at 50KHz (No, not to my hand!). It made a nasty little burn hole in my carpet!

Tesla list <tesla@xxxxxxxxxx> wrote:
Original poster: "Black Moon"

Heh. 'feeling' power is a very intresting experiance.. Ever grab a live
15kv NST wire? (with 15kv insulated with + perferabley another layer!) you
can actualy feel the 60hz vibration caused by (I assume?) static charge

>From: "Tesla list"
>To: tesla@xxxxxxxxxx
>Subject: Re: Safe parameters for stupid human Tesla coil stunts
>Date: Fri, 24 Dec 2004 08:05:58 -0700
>
>Original poster: "Antonio Carlos M. de Queiroz"
>
>Tesla list wrote:
> >
> > Original poster: "Harold Weiss"
>
> > I tried something like that with one of my older coils, only that I was
> > touching the grounded point of my "gator stick" so that the point was
> > presented first. When I started seeing corona on the tip I stopped, as I
> > could feel every time the spark gap broke and the varying power of each
> > bang, and it felt like being ungrounded and touching a hot AC line. The
> > fact that it felt like 60 Hz should send up warning flags.
>
>The most dangerous may be what you don't feel. When I made my first
>coil, I tried to see if I could pull an arc to a screwdriver, holding
>it by the end of the plastic handle. Should work, due to the high
>frequency. And really it worked, an arc jumped to the screwdriver,
>across the handle, and carved a little black hole in my hand...
>Ok. Let's then avoid contact with the arc... I picked a metal ball
>and again tried to pull an arc to the ball while holding it. Worked,
>surely. And I barely could flex my fingers for the next six months
>due to the internal burns in all the joints...
>
>Antonio Carlos M. de Queiroz
>