Re: wima fkp1 mmc

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

Original poster: "jimmy hynes by way of Terry Fritz <teslalist-at-qwest-dot-net>" <chunkyboy86-at-yahoo-dot-com>


yeah, I know you could series and parrallel more capacitors, but then you 
end up with a mmc that can withstand more voltage than ever needed. I was 
thinking it would be cheaper to find capacitors that could stand twice the 
current instead of buying 4 capacitors with half the current rating. If I 
was going to make my own capacitor, it would certainly be better this way. 
Since geek group capacitors are cheaper, I will just make an mmc instead of 
emmc ;-).

  Tesla list <tesla-at-pupman-dot-com> wrote:
Original poster: "S & J Young by way of Terry Fritz "


Jimmy,

The great thing about MMCs is that you can make them with as many parallel
strings of series caps as you want. There is no reason for MMCs to be the
power limiting factor (except possibly the cost). For example, my MMC is
made up of 16 parallel strings of 12 0.022 mF caps in series. Thus, if you
are worried about one string of 15 in series not being able to handle the
current, then go to 2 parallel strings of 30 in series. Using a sufficient
number of caps, one can make Electrum class TC MMCs that should be just as
robust as the big Maxwells.
--Steve Young

----- Original Message -----
From: "Tesla list"
To:
Sent: Thursday, January 09, 2003 6:31 PM
Subject: Re: wima fkp1 mmc

 >
 > Original poster: "jimmy hynes by way of Terry Fritz "

 >
 >
 > What I mean is that compared to an identical coil, but driven with
 > transformers and a spark gap, it will have to carry twice the current. The
 > mmc is probably what is going to limit the power of my system. every other
 > part of the system shouldn't mind break rates to up to 1500 or so. I
 > ordered some geek caps yesterday. I knew there weren't many failures, but
I
 > didn't know how close to failing the rest were. The only reason to go with
 > wima would be that I might not have to put more capacitors in series, just
 > so I can get more in parallel.
 >
 > Tesla list wrote:
 > Original poster: "Mark Broker by way of Terry Fritz "
 >
 > Define "especially hard on caps," please.
 >
 > Also, if it means anything, of the thousand(s) of caps we! 've sold (I'm not
 > privy to the precise
 > number),! I've only heard of three caps failing. The most recent appeared
 > to be a
 > manufacturing defect. The other two were destroyed by John Dyer when he
 > was running a
 > 20kV MMC at about 26.5kV (15kV NSTs at 150V input) with a widely-spaced
 > static gap.
 >
 > Mark Broker
 > Chief Engineer, The Geek Group
 >
 >
 > 1/7/2003 6:45:19 PM, "Tesla list" wrote:
 >
 > >Original poster: "jimmy hynes by way of Terry Fritz "
 >
 > >
 > >
 > >
 > >
 > >Where can I find Wima fkp1 series capacitors? Jan Wagner recommended
these,
 > >and from Terr! y's testing that I found in the archives, it looks like
these
 > >are able to stand the highest currents. I would go with geek group
 > >capacitors but my design is especially hard on the caps, and I'm not
sure
 > >geek caps can take it. I checked digikey, allied, arrow, and some other
&g!
t; >places, but I cant find them.
 > >
 > >
 > >Jimmy
 > >
 > >
 >
 >
 >
 > Jimmy
 >
 >
 >
 >



Jimmy