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Re: Neon power draw, and resonant stresses.
From: Peter Electric[SMTP:elekessy-at-macquarie.matra-dot-com.au]
Reply To: elekessy-at-macquarie.matra-dot-com.au
Sent: Sunday, August 31, 1997 4:30 AM
To: Tesla List
Subject: Re: Neon power draw, and resonant stresses.
Tesla List wrote:
> >>
> >> I'm unable to find the formula, I was hoping someone would re-post
> >> it for you again. "does it stress the neon too much?"... depends
> on
> >> what you mean by too much. Certainly, it stresses it more than
> >> without resonant charging. Yes, by limiting the gap spacing, you
> can
> >> limit the voltage across the trannie, and still obtain the benefit
> of
> >> the increased current draw. None of my neons have yet burned,
> >> and I've been using this resonant method for years.
> >> (I did burn out a couple of neons...but that was when I used a
> >> non-sync rotary gap!)
> >>
> >> John Freau
> >
> >I believe the formula is C=1/2*PI*F*R
> >where R=V/I
> >
> >For a 15Kv 60Ma, R=250000 and if F is 60Hz, C=.01uF
> >
> >Cheers,
> >
> >Peter E.
> >
> >
> Peter, what is R? Is it the internal dc resistance of the NST's
> secondary winding? If so then I would have to 1/R=1/R2+1/R3 etc. to
> get
> R when using several units? I will most likely be using a few 12kV
> 60mA
> units. I have 3 of these plus two 30mA units. I would be using my 15kV
>
> units but I ordered plastic for my cap befor I got them and dont want
> to
> apply that much voltage.
>
> Danger! 250,000 Ohms!
> Mad Coiler
No R is not the straight DC resistance but the AC Impedance (so I
suppose it should really be called X). If you use several trannies in
parallel, you add the currents, so the formula would be the same for two
30mA/12 kV's as for one 60mA/12kV.
I use the WinTesla program to calculate it for me and avoid straining
the brain!
Cheers,
Peter E.