Does anyone have CDE 942 series (or similar) capacitors?

["Tesla list" <tesla@xxxxxxxxxx>]

Original poster: "Ethersmith" <siveya@xxxxxxxxxxxxxx>

I am building my first small coil and I only need a dozen or so 2k/.068 or
.1uF caps. I am looking for CDE 942 series caps, and many online
distributors are currently out of them. Does anyone have any of these, or
similar trusted caps, that they would like to sell?

Best,

--Ethersmith



-----Original Message-----
From: Tesla list [mailto:tesla@xxxxxxxxxx]
Sent: Tuesday, August 02, 2005 10:40 PM
To: tesla@xxxxxxxxxx
Subject: Re: The right capacitor match?


Original poster: "Mark Broker" <mbroker@xxxxxxxxxxxxxxxx>

The CDE 940 series are not really suitable for TC applications.  They
are a metalized film construction, which makes for very weak
electrode/lead wire connection.  Therefore they tend to fail due to
over current.  An oversized MMC with 940s will likely work just fine,
as I'm sure some will attest to.  But the best capacitor to look for
is the CDE 942 series.  These are well-used and well tested.  A
string of 13 2kV, .10uF caps will work, as will 10x 2kV .068uF
caps.  The MMC made with the .10's will be more robust but will cost more.

Richardson's Electronics seems to be the best place to buy them,
though they have a minimum order.  Some on the list may have a dozen
to spare, though :)

Cheers!

Mark Broker


On Tue, 02 Aug 2005 22:29:09 -0500, Tesla list <tesla@xxxxxxxxxx> wrote:

>Original poster: "Ethersmith" <siveya@xxxxxxxxxxxxxx>
>
>Greetings,
>
>New coiler here, hoping to find some aid.
>
>I have a 15K/30mA NST which I am building an MMC for.
>
>Given LTR of 1.5* I have come up with a match in the range of .008mF
>
>I have had trouble finding HV caps in the lower Farad range. (Any current
>suggestions would be greatly appreciated).
>
>I have found some Cornel Dubilier (940C30S47K) "Snubber Capacitors" that
>look like they will work. They are not on Terry's known Bad Caps list. They
>are rated at 3kv .047mF
>
>If I have done my math properly, I only need six of these in series to get
a
>capacitance of .00783mF (which is in my LTR range) and a voltage of 18,000v
>(which exceeds my NST voltage)
>
>This seems small and cheap compared to what others seem to need regularly.
>Is it just that my coil is one of the smaller ones out there? Or have I
made
>some egregious error?
>
>Your input is golden.  Thank you.
>
>--Ethersmith
>
>
>