Re: MMC Caps
> Original Poster: "Daniel Lockhart" <DanielLockhart-at-letu.edu>
> Hi everyone,
> I've been out of the picture for a while, and I'm sure you get a a lost of
> posts about MMC caps, but my curiosity is up.
> I was doing my calculations for making a rolled poly cap, and geting the
> necessary vacuum components together when I got Terry's post about the
> QBasic program and investigated some of the photos on his site. MMC caps
> sound like an order of magnitude easier to make. But tell me:
> a). Do they perform as well?
> b). Are they sufficiently durable?
Yes - if rated conservatively you shouldn't need to build another.
> c). Are they actually easier to construct?
Does it really matter? I've rolled cheapo extended foil caps using
plastic and Al foil, and built MMCs on PC boards. Apples and
oranges. Only one person needed for MMCs.
> d). How are they contained? (oil bath?)
> e). Are they too good to be true?
You always get what you pay for both in money and time. They cost
but they perform.
> Should I go out and buy my poly, or build an MMC? Thanks for any info!
I would build MMCs any day. No risk of explosions, no oily messes,
no having to deal with dodgy plastic etc. etc. I house my MMCs in
cheap plastic lunchboxes. Building a number of them allows for easy
wiring up of different combinations for different capacitances and