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Re: PE-Caps, tests, and some questions
On Wed, 21 Apr 1999 11:51:59 -0600 Tesla List <tesla-at-pupman-dot-com> writes:
>Original Poster: Chris Tominkson <internetinbox-at-yahoo-dot-com>
>
>The other day I tested some Aluminum
>Flashing/Polyethelyne caps and I realized that the Al
>flashing is really hard to roll, and also the
>recomended 90 Mils of PE is way too much to roll with
>Al flashing, and I had three other people helping me.
>
>I calculated the caps to be .005 uF, but when rolled
>they were way too low (like 7 or 8 times too low),
>because of misaligned plates, air gaps, and we were
>just unable to make them work. So we made the
>polyethelyne 12 Mils thick, with the same plates, and
>got a .0198 uF off the fluke, thats huge! And those
>were very easy to roll, we probably could have got
>even more with Aluminum Foil, since it could be rolled
>tighter.
But there's all that stuff about the weakness of the foil, and it's
ability to carry the HF currents is worse for its thiness
>
>But why I wrote this post is this: A lot (6+) of
>smaller capacitors would be a lot easier to create,
>roll, and handle than one or two big ones.
Quit true! And, the properties are much better for pulse caps-- that's
how professional ones are made; by stringing together in a
series/parallel arrangement until the proper values are reached.
>
<snip>
>
>Any response would be appreciated
>
>Chris
>
>
With silent lightning in my hands,
-The Electrophile-
Grayson Dietrich
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