Re: homebrew MMCs

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

Original poster: "Terry Fritz" <twftesla-at-qwest-dot-net>

Hi Godfrey,

You can actually buy reels of dielectric, foil, metalized film, etc.
pre-made by OEMs that do that stuff.  You can also buy nice winding
machines (used too!).  Just like the Maxwells and other semi custom cap
shops do...  Of course, you can spend thousands of big bucks doing it...
Not totally impossible if you could somehow justify the costs.  One could
go the cheap route and use standard poly sheeting and aluminum foil but it
is not nearly as good...  There is nothing stopping anyone from making caps
in their garage except debt.  I think some high-end audio cap "places" do
this.  Some guy buys a machine and films and starts selling "sondo wonder
caps" for 1000X what Digi-Key does...  But unless you can find some cap
design that is really hard to find off the shelf, the "big boys" are going
to beat you on cost by a few orders of magnitude...  Still feeling lucky
:-))  Check out these cool links...

http://hiltonind-dot-com/winding.htm

http://www.reynoldsindustries-dot-com/about/facil-part4.pdf

Check out that 160kV "Micaplier" near the bottom!  DigiKey don't sell that!

http://www.ec-central-dot-org/magazine/PDF/art_1_sept_oct_01.pdf

this is an interesting discursion about how a 10 cent capacitor's price
jumps to $100 if you want to use it in a pacemaker...

http://www.dhruvindustries-dot-com/capacitorfilms.htm

India for your capacitor films...

So you have the machine and materials, there are tricks too so that the
thing works right.  Call "me" ;-))

But really, just buy them from the geek group ;-))

Cheers,

	Terry


At 07:36 PM 5/30/2002 -0500, you wrote:
>After reading a posting about the geek bucket, I began wondering why no one
>has looked into homebrew MMCs. I'm assuming that the lack of high tech
>materials is the barrier. Certainly an MMC can be dissected to analyze the
>arrangement of materials. Still it seems like a version using low tech
>materials might be possible. 
>
>By the way, I only realized tonight that its the geek group, not the greek
>group! This makes more sense now. 
>
>Godfrey Loudner 
>