[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]
RE: CD cap MMC
- To: tesla@pupman.com
- Subject: RE: CD cap MMC
- From: "Tesla list" <tesla@pupman.com>
- Date: Wed, 08 Oct 2003 20:07:35 -0600
- In-Reply-To: <4105FF527D8A1D4081C07B1147BF74150150C344@rocket.agresearch.co.nz>
- References: <4105FF527D8A1D4081C07B1147BF74150150C344@rocket.agresearch.co.nz>
- Resent-Date: Wed, 8 Oct 2003 20:54:41 -0600
- Resent-From: tesla@pupman.com
- Resent-Message-ID: <kw2cID.A.8kF.u3Mh_@poodle>
- Resent-Sender: tesla-request@pupman.com
Original poster: Terry Fritz <teslalist@twfpowerelectronics.com>
Hi Chris,
The chart says 0.0214uF is resonant for a 15/120 at 60Hz, so that is what I
assumed. If I were sharp 0:-p I would have noted the 25nF and guessed he
was at 50Hz and would need 25nF.... so 2 strings of 12 ;-))
But really, I would normally "always" suggest an LTR value, NOT the
resonant value.... I assumed the poster here knew what he wanted and
really did want a resonant value as opposed to the far more suggested LTR
values...
Personally, "I" would "never" make a coil with resonant size caps. Sync
(triggered gap) LTR is by far the best IMHO...
Cheers,
Terry
At 07:45 PM 10/8/2003, you wrote:
>Hi Terry
>
>I'm interested in why you are suggesting a less than resonant value, as I
>too am about to build a new MMC and am looking at what capacitance value I
>should be aiming for. I haven't read up on smaller verses larger, verses
>resonant so excuse me if the answer should be obvious.
>
>Cheers, Chris (NZ)
>
>-----Original Message-----
>From: Tesla list [mailto:tesla@pupman.com]
>Sent: Thursday, 9 October 2003 1:43 p.m.
>To: tesla@pupman.com
>Subject: Re: CD cap MMC
>
>
>Original poster: Terry Fritz <teslalist@twfpowerelectronics.com>
>
>Hi Kreso,
>
>The peak current for the 940 series 0.15uF 2kV cap you mention is 144 amps
>peak. The 940 series is not thick metal foil but only thin vacuum
>deposited aluminum that is not good for super high current.
>
>http://www.cde.com/film/9402000.htm
>
>Our favorite 942 series caps (942C20P15K) use full metal foil for 432 amps
>peak.
>
>http://www.cde.com/film/9422000.htm
>
>You want the 942 series 942C20P15K for sure! Some people have gone with
>the 940 series ok, but sometimes they fail too... It all depends on how
>your coil is set up.
>
>The chart at:
>
>http://hot-streamer.com/temp/MMCcapSales.gif
>
>Tells how many you need. I am not sure what your line frequency but if it
>is 60Hz a nice value is 0.214 using a 14 x 2 MMC.
>
>
>At 11:47 PM 10/7/2003, you wrote:
> >Maybe i will ghet CD caps 942C20P15K: 2000volt DC at .15 microfarad
> >what
> >do you reccomend for 15kV 120 mA nst?? I need 25 nF for resonant bud i do
> >not want resonant i destroyed my Maxwell . So whad do you suggest how much
> >cap for a durable MMC really durable i will not push my luck and i wont it
> >to work for long time.
> >
> >Best Regards
> >
> >Krešo
> >
> >P.S. Terry dont kill this post is it-s important