Re: first post (fwd)

["Tesla list" <tesla@xxxxxxxxxx>]

---------- Forwarded message ----------
Date: Wed, 15 Aug 2007 13:42:55 -0500
From: Terri Neeley <neeley_111@xxxxxxx>
To: tesla@xxxxxxxxxx
Subject: Re: first post (fwd)


I don't know what I was thinking.  I need .066microF so 3 strings of 7
would work out fine right? 

Garry Neeley

________________________________________________________________________________

      From:  "Tesla list" <tesla@xxxxxxxxxx>
      To:  tesla@xxxxxxxxxx
      Subject:  Re: first post (fwd)
      Date:  Wed, 15 Aug 2007 11:59:45 -0600 (MDT)
      >
      >---------- Forwarded message ----------
      >Date: Wed, 15 Aug 2007 13:00:10 -0500
      >From: Crispy <crispy@xxxxxxxxxxx>
      >To: Tesla list <tesla@xxxxxxxxxx>
      >Subject: Re: first post (fwd)
      >
      >Hmm, by my calculations, you'd only need 7 per string.  The
      caps are
      >rated at 150nF, 2kV each, if I recall.  9000Vrms is about
      12730V peak.
      >Divided by 2000V per cap and rounded up comes to 7 caps per
      string.
      >This alone is more than the 15nF you want.  If you want
      exactly 15nF,
      >you can use one string of 10, and have a healthy voltage
      margin as well.
      >On ebay, the ebay store TeslaStuff sells lots of 12 of these
      caps for
      >under $50.
      >
      >Hope this helps,
      >Chris
      >
      >On Wed, 2007-08-15 at 11:05 -0600, Tesla list wrote:
      > > ---------- Forwarded message ----------
      > > Date: Wed, 15 Aug 2007 12:07:09 -0500
      > > From: Terri Neeley <neeley_111@xxxxxxx>
      > > To: tesla@xxxxxxxxxx
      > > Subject: Re: first post (fwd)
      > >
      > >
      > > Exactly what Mr. Lux said.  Many people have used these
      transformers with
      > > success and I thought it could be a cheaper alternative
      than stacking
      > > nst's.  The transformers I have are 4500v 450ma btw.  So
      if you use Jim
      > > Lux's config you essentially split the current between
      the two and double
      > > the voltage.  I will be using a synchronous rotary
      gap.  My question is
      > > are there really any alternatives to CD942's?  What about
      wima fkp1's?
      > > They seem to be much cheaper considering the cd's are
      over 3 bucks a
      > > piece and I would need 6 strings of 18 of the .015mF for
      this coil.  I'm
      > > just very new to this and I really just want a cap or mmc
      that will be as
      > > reliable as reasonably expected to be.  Any really good
      alternatives
      > > besides the CD's?  There gonna set me back at least 350$
      for them.
      > >
      > > Garry Neeley
      > >
      > >_______________________________________________________________________________

      > >
      > >       From:  "Tesla list" <tesla@xxxxxxxxxx>
      > >       To:  tesla@xxxxxxxxxx
      > >       Subject:  Re: first post (fwd)
      > >       Date:  Wed, 15 Aug 2007 10:23:54 -0600 (MDT)
      > >       >
      > >       >---------- Forwarded message ----------
      > >       >Date: Wed, 15 Aug 2007 09:16:18 -0700
      > >       >From: Jim Lux <jimlux@xxxxxxxxxxxxx>
      > >       >To: Tesla list <tesla@xxxxxxxxxx>,
      tesla@xxxxxxxxxx
      > >       >Subject: Re: first post (fwd)
      > >       >
      > >       >At 08:38 AM 8/15/2007, Tesla list wrote:
      > >       >
      > >       > >---------- Forwarded message ----------
      > >       > >Date: Wed, 15 Aug 2007 08:29:08 -0700
      > >       > >From: huil888 <huil888@xxxxxxxxxxxx>
      > >       > >To: Tesla list <tesla@xxxxxxxxxx>
      > >       > >Subject: Re: first post (fwd)
      > >       > >
      > >       > >Terri -
      > >       > >
      > >       > >First question is about your HV power supply
      transformers.
      > >       These are
      > >       > >nominally rated at 4500 volts RMS, 400ma. I
      assume that
      > >       you intend to
      > >       > >connect them in series to obtain 9KV RMS AC
      output?
      > >       Peak-to-peak voltage
      > >       > >will be about 12.7KV.  Are you sure that the
      transformer
      > >       insulation will
      > >       > >withstand this? One good flashover at this much
      current
      > >       may destroy the
      > >       > >transformers.
      > >       > >
      > >       > >How will you limit secondary the current to
      225ma?
      > >       >
      > >       >I think that the plan is to cascade the two
      transformers in
      > >       series,
      > >       >using the 600V tertiary winding, so the "high"
      transformer's
      > >       core is
      > >       >floated at 4500V.
      > >       >
      > >       >These things have a fair amount of leakage
      inductance, so
      > >       the output
      > >       >current is limited.
      > >       >
      > >       >
      > >       >
      > >       >I built a similar cascade, using 4 transformers:
      two
      > >       cascades, with a
      > >       >center ground, and it's in many respects like a
      giant NST.
      > >       >
      > >       >
      > >       >
      > >       >
      > >
      > >
      > >_______________________________________________________________________________

      > >
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      >


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