Re: Polycap

["Tesla list" <tesla-at-pupman-dot-com>]

Original poster: "Paul Marshall by way of Terry Fritz <twftesla-at-uswest-dot-net>" <klugmann-at-hotmail-dot-com>

Al if you could tell me what the length of the poly was before you rolled it 
I could help you. Oh by the way as the caps settle out the capacitance will 
increase. This is due to the removal of trapped air.

Paul M

PS: I wouldn't try 40Kv.


>From: "Tesla list" <tesla-at-pupman-dot-com>
>To: tesla-at-pupman-dot-com
>Subject: Re: Polycap
>Date: Wed, 24 Jan 2001 17:13:35 -0700
>
>Original poster: "by way of Terry Fritz <twftesla-at-uswest-dot-net>" 
><Leik3-at-aol-dot-com>
>
>Hi all,
>Regarding the post by Paul, he (you) said that you used a single sheet of
>.060" poly between the plates?? I read that the piercing voltage (is that
>what it's called?) was 350V/mil. Is that about right?? Seems the PE would
>break down. Here's what I did: I wanted to make this cap once, and make it
>right (that's before I learned about flaming oil bombs etc..) so I used 28
>layers of .040" PE between two plates of Aluminum flashing. This thing was
>not easy to roll!!  The Al is centered all around the PE with two inches 
>all
>around it. I think this should take a cool 40kv assuming my numbers were
>right.
>Is there anyone out there that could tell me what the capacitence should 
>be??
>I'm measuring less than what I calculated-->0.005mF but it's not in oil 
>yet.
>It's a monster.        :)
>Thanks,
>Dennis
>
>
>

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