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Re: this cap made for trouble?
Hi Jan,
I've had to ask the same questions when I was planning my tank cap and I've
tried to gather together what I've learned onto my web site. I recommend you
take a look at http://www.breakfix.demon.co.uk/tesla_cap1.html as it save me
repeating it here.
Steve Bell (UK)
steve-at-breakfix.demon.co.uk
http://www.breakfix.demon.co.uk
----- Original Message -----
From: Tesla List <tesla-at-pupman-dot-com>
To: <tesla-at-pupman-dot-com>
Sent: 19 December 1999 03:39
Subject: this cap made for trouble?
> Original Poster: Jan Florian Wagner <jwagner-at-cc.hut.fi>
>
> Hi,
>
> about to turn from a TV flyback powered TC to something bigger during the
> holidays... The problem is now the tank capacitor, and I'd be very happy
> if someone could tell if I'm heading into trouble / a bad cap with the
> following ideas.
>
> I've made some tests with plastic bags (PE), and ordinary transparency
> sheets (like those you write on, not those for printer/copier), and both
> seem to stand 3kVAC very well. No clue about RF properties though. :o)
>
> So, this is what I had in mind:
> - a couple of transparency sheets stacked up, with
> household aluminium foil in between. goal is 10nF for 8kVAC
> - aluminium foil folded twice or more often
> - using the 10nF caps, a 4x4 cap array to be powered
> by a 8kV 50mA NST (200W/400VA, cos(phi)=0.5)
> - thin layer of liquid paraffine oil between alu & transp. sheet
> during assembly, later whole thing immerged in paraffine oil
>
> Does this sound ok?
>
> I think that the transparency sheet will stand the strain, but not so sure
> about the aluminium foil... What type of foil is used in commercial HV
> pulse caps? Any thicker than household alu foil?
>
> Many thanks in advance
>
> - Jan
>
> --
> *************************************************
> Jan Florian Wagner
> jwagner-at-cc.hut.fi, petwag-at-kolumbus.fi
> http://www.dsh.edu.hel.fi
>
>
>