Re: Cap Formulas (fwd)

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Original poster: List moderator <mod1@xxxxxxxxxx>



---------- Forwarded message ----------
Date: Sat, 9 Dec 2006 21:00:47 -0700
From: S&JY <youngsters@xxxxxxxxxxxxxxx>
To: Tesla list <tesla@xxxxxxxxxx>
Subject: Re: Cap Formulas (fwd)

NO, NO, NO!  Mylar is only suitable for DC and low frequency (e.g. 60 Hz
AC).  It is totally unsuitable for RF applications and will fail quickly.
Please save yourself from a lot of work followed by a disastrous ending by
not using Mylar!

I strongly recommend you consider instead making a capacitor (MMC) of a few
paralleled strings of series connected commercial polypropylene (snubber)
capacitors.  The archives are full of information about MMCs.
--Steve Y.

----- Original Message ----- 
From: "Tesla list" <tesla@xxxxxxxxxx>
To: <tesla@xxxxxxxxxx>
Sent: Saturday, December 09, 2006 5:26 PM
Subject: Cap Formulas (fwd)


Original poster: List moderator <mod1@xxxxxxxxxx>



---------- Forwarded message ----------
Date: Sat, 9 Dec 2006 04:04:16 -0500
From: Victor Yoo <vlysvc@xxxxxxxxxx>
To: Tesla list <tesla@xxxxxxxxxx>
Subject: Cap Formulas

Can any one help me with calculating the required area (length of plates) to
make a rolled cap using the following;



20" wide by XX long aluminum flashing

24" wide x .007" thick x XX long Mylar film



With a dielectric constant of 3.0 and a puncture voltage of 7500v I figure
that I can make two 0.1uf @ 52.5kv for a total of 0.2uf for my 14.4kv 10kva
pig.

I will be immersing the roles in mineral oil.



Any ideas or comments?



Victor


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