Re: [TCML] Party Cup/ TCBOR Caps

[Travis Tabbal <travis@xxxxxxxxxx>]

On Wed, Nov 3, 2010 at 10:01 AM, Michael Baumann <baumann@xxxxxxxxxxxxx>wrote:

> 1)Lossy: I have no measurements to back this up, but I doubt it. It's
> essentially a much, much larger version of your MMC cap.
>
> 2) If you try and use paraffin, you will be sorely disappointed. And have
> nice fun to watch fires too. you just can't get the air out.
>        Air = corona = failed PE = fire.  Position sensitivity is a
> non-issue if you've vacuumed your rolled cap, and give yourself a bit of
>        expansion space (the oil expands as it heats). Just make sure you've
> a bit of a gap between the roll and the cylinder.
>
> 3)Inductance - depends on the construction. If you do a single connection
> point - it'll be bad. If you
>     make sure you have at *least* a connection per turn coming out you
> should be ok (Personally, if you're going rolled I'd
>        just extend the foil beyond the edge of the PE. Personally, that's
> why I did flat plate caps, even with the lower
>        capacitance/cost ratio
>


What design did you use? I saw an old message talking about a design using
ziploc bags without the zippers and foil in stacks. Seemed like an
interesting way to look at it. A few stacks like that in series/parallel
submerged in oil.

The rolled type seem easy enough, poly film and flashing/foil rolled up.
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