Fwd: RE: [TCML] Capacitor encapsulent (fwd)

[Chip Atkinson <chip@xxxxxxxxxx>]

Forwarding this for Brian and to diagnose email/list issue.

Chip

---------- Forwarded message ----------
Date: Mon, 01 Jun 2009 09:32:30 -0400
From: brianb@xxxxxxxxxx
To: tesla@xxxxxxxxxx
Subject: Fwd: RE: [TCML] Capacitor encapsulent


----- Original Message -----
From:
To: '' Tesla Coil Mailing List '' , 'Jim Mora'
Sent: Thu May 28 7:02
Subject: Fwd: RE: [TCML] Capacitor encapsulent


Guys,

Here is how we used to do it. These homemade LDPE caps were hand made over 12-years ago and are still working
great after many hours producing 6-7' arcs. You will notice that they were made before I had a digital camera :-)

http://www.brianb.org/images/Tesla/Construction%20Pictures/six_inch_coil/cap_tanks.html

Rolling your own was quite a lot of work and not inexpensive but very rewarding when they worked (plus I learned
a lot and it was great to put the theory into actual use).

You can also see the safety gap which I had set to fire before an overvoltage. When it went off, and it did quite
often in the early days, it sounded like a machine gun....


Tank Capacitors
Number of Capacitors 4
Capacitor Configuration Series/Parallel
Type Rolled LDPE
Overall C .042 uf
Overall V 22kv rms minimum
C of each unit .042 uf
Dielectric Constant 2.0
Plate Length 120 inches
Plate Width 14 inches
Dielectric .036 inches (6@.006")

Regards,
Brian B.



On Wed May 27 20:19 , "Jim Mora" sent:

      Gregory,
      You might consider collecting a number of clear 2 liter soda bottles and cut
      the flat sides into dielectric plates. They would be around 12x7 or so.PETE
      has a very high standoff and is much thinner than glass so the charge will
      be much greater. A roll of 5" flashing would be perfect for the plates. Is
      the dielectric thickness an inverse square relationship, anyone know?
      Jim Mora

      -----Original Message-----
      From: tesla-bounces@xxxxxxxxxx [tesla-bounces@xxxxxxxxxx','','','')">tesla-bounces@xxxxxxxxxx] On
      Behalf
      Of Christopher Karr
      Sent: Tuesday, May 26, 2009 10:36 AM
      To: Tesla Pupman List
      Subject: RE: [TCML] Capacitor encapsulent


      Gregory,



      The way to think about a group of seriesed capacitors is, in this case, as a
      single series of plates and insulators. The arrangement is 'capacitor lead -
      plate - insulator - plate - capacitor lead - capacitor lead - plate -
      insulator - plate - capacitor lead'. By this examination, since the plates
      are conductive, as well as the leads, we can consider the conductive
      elements that aren't separated by an insulator as a single conductor;
      therefore, a series capacitor array is simply a single capacitor with
      multiple sections of insulation: 'conductor - insulator - conductor -
      insulator - conductor'. This means that if voltage division between
      components occurs with seriesed capacitors, it should also work with
      floating insulators and plates.



      Christopher Karr




      > Date: Mon, 25 May 2009 20:16:39 -0700
      > From: dogbrain_39560@xxxxxxxxx
      > Subject: RE: [TCML] Capacitor encapsulent
      > To: tesla@xxxxxxxxxx
      > CC:
      >
      >
      > > degrades rapidly. The CDE caps we use in MMC's are
      > > actually constructed as two seriesed caps, with a "floating
      > > plate" between the two terminals, to effectively double the
      > > corona inception point.
      > >
      > > So, unless you build your DIY cap as several seriesed
      > > units, you will get corona and a compromised life
      > > expectancy, regardless of dielectric thickness.
      > >
      > > Regards, Gary Lau
      > > MA, USA
      > >
      >
      > I've read about the "floating plates" tactic before, but I'm not sure I
      understand it correctly. I get how a number of caps wired in series will
      divide up the applied voltage. Will a single cap using multilayer dielectric
      with floating plates between each layer accomplish the same end? Do the
      "wired" plates and the "floating" plates divide up the voltage equally? Just
      curious.
      >
      > Gregory R. Hunter
      >
      >
      >
      > _______________________________________________
      > Tesla mailing list
      > Tesla@xxxxxxxxxxxxxx
      > http://www.pupman.com/mailman/listinfo/tesla

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