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Re: Jeff Parisse's Safety Tips
Tesla List wrote:
>
> >From DamDeName-at-aol-dot-comMon Jul 8 16:37:04 1996
> Date: Mon, 8 Jul 1996 15:45:51 -0400
> From: DamDeName-at-aol-dot-com
> To: tesla-at-pupman-dot-com
> Subject: Re: Jeff Parisse's Safety Tips
>
> Hi all ,
>
> big snip
> Contrasting this lethal energy with the energy stored in a .025 Mfd.
> cap.
> charged to say --- 20,000 volts = .5 CV^2 => 5000 jules !--- assume the
> energy
> is discharged through the body ---Measure the resistance of your body -long
> path-(stand on some metal flashing with bare feet,connect your multimeter
> lead to it & place the other lead in your mouth )
> I'll do that now for me ----- tween 1 & 2 K --- (depends on if i'm
> biting on the gold or not ) :<)) ------- ok -- lets take worst case --1
> K. -----
> 1 RC time constant = .025 seconds 5 = .125 seconds Assuming the
> resistance remains constant (it don't ) but if it did --- that's about 50000
> watts for a tenth second ------- the body turns into steam,carbon ,salt
> -water & fire --- fingers & hands are blown off by super-heated steam ---
> literal hell-fire ----
> The priority of safety cannot be overlooked ----
>
> I'd like this forum to be available when my kids want to learn
> how to build a Tesla Coil --------- & I'd like to feel they would learn in
> safety -----------------
> I recently directed an individual to one of Mr. Hull's videos --- as
> a good
> intro on safety & T.C. construction ---- I haven't seen the video myself----
> but felt it was a good thing to do --- & I don't feel like I "went out on a
> limb"
> ------------- To me --- That's a good feeling ----
> Thanks all
> Sandy
>
>
> Sandy,
Sorry to nit-pick, but .025ufd charged to 20,000 volts is 5.0 joules, not
5000. A good way to blast this out quickly is to take the kilovolts and
square it (400) times half the capacitance in microfarads...
1/2 X .025=.0125. This give 5 joules. In this manner we can think and
compute in kilovolt units (what we normally use) and microfarads (also
what is most common to coilers).
Still, your warnings are well taken by all.
Richard Hull, TCBOR
>