Re: MMC cap preferences? (fwd)

["High Voltage list" <hvlist@xxxxxxxxxx>]

Original poster: <sroys@xxxxxxxxxxxxxxxxx>



---------- Forwarded message ----------
Date: Sat, 12 Mar 2005 20:26:30 -0700
From: Dr. Resonance <resonance@xxxxxxxxxx>
To: High Voltage list <hvlist@xxxxxxxxxx>
Subject: Re: MMC cap preferences? (fwd)



Resonance Research Corp carries the 0.15 uF  2 kV  MMC caps in stock for
immediate shipment.

Dr. Resonance


>
> If you look at the other post tonight on this subject, you will see that
> the recommended cap is
>
>   "The ones most popular are made by Cornell Dubilier,
>   they are 0.15 uF at 2000 VDC, part number 942C20P15K."
>
> These sell at RELL for $2.45
> http://catalog.rell.com/rellecom/scripts/SkuPage.asp?SKU=162589&PNO=&PNM
> =
>
> These are more expensive per unit __but__ doing some arithmetic we see
> that they have a bit over three times the capacitance (plus the higher
> working voltage = more safety margin) for a bit less than 1.5 times more
> money.
>
> Looking at this another way, if you needed to buy 60 of the Newmark
> caps, you would only need to buy 20 of the RELL ones.
> Newmark = $99 / RELL = $49
>
> With RELL, you do need to buy a specific minimum quantity that they
> quote you in the web page but it's always good to get ten or so extras
> because you will blow up the occasional cap and this way, you are back
> in operation immediately.
>
> Finally, the C-D 942 series is known to be the best for MMC work.  There
> may be newer technologies coming out that will work better but I have
> not heard of anything else being used now.  The Vishay may be fine but
> it is not known how it works in Tesla applications. If you wanna spend a
> hundred bucks on something that may blow up in the first five minutes of
> operation, feel free and please let us know about it.  <big grin>
>
> Dave
>
> > -----Original Message-----
> > From: High Voltage list [mailto:hvlist@xxxxxxxxxx]
> > Sent: Thursday, March 10, 2005 6:37 PM
> > To: hvlist
> > Subject: MMC cap preferences? (fwd)
> >
> >
> > Original poster: <sroys@xxxxxxxxxxxxxxxxx>
> >
> >
> >
> > ---------- Forwarded message ----------
> > Date: Mon, 7 Mar 2005 15:28:25 -0700
> > From: Gomez Addams <gomez@xxxxxxxxxxxx>
> > To: High Voltage list <hvlist@xxxxxxxxxx>
> > Cc: Colorado Tesla Coilers <gnats@xxxxxxxxxx>
> > Subject: MMC cap preferences?
> >
> > What is the current recommended basic capacitor from which to
> > build MMC
> > banks?  The reason I ask is that I just got a flyer from Newark
> > advertising a metallized propylene cap from Vishay, specifically
> > intended for high voltage, high frequency, high current, high pulse
> > applications.
> >
> >   Maximum pulse rise times range from 133v/uS to 9610v/uS
> > depending on
> > lead spacing and voltage rating.
> >
> > Highest rating: 1600 V, 0.047 uF, $1.65 ea. in singles. Newark stk#
> > 65C0858, Vishay# MKP1841347134.
> >
> >   - B(G)L
> >
> > ..............................................................
> > ..........
> > ........
> > "A physical experiment which makes a bang is always worth
> > more than a
> > quiet one.
> > Therefore a man cannot strongly enough ask of Heaven: if it wants to
> > let him
> > discover something, may it be something that makes a bang.  It will
> > resound into
> > eternity."  - Georg Christoph Lichtenberg 1742-1799
> >
> >
> >
> >
>
>
>