Re: **Does anyone have CDE 942 series (or similar) capacitors? - MMC Voltage

["Tesla list" <tesla@xxxxxxxxxx>]

Original poster: Jimmy Hynes <jphynes@xxxxxxxxx>

Well, if you're gonna do everything withing the ratings, it's AC, so 
that's 600V RMS/cap :P They've been shown to work well at and beyond 
the DC rating. Assuming you do hit the peak voltage of 21.21KV (may 
or may not, depending on gap settings and C size), then it's less 
than 20% over spec, and they'll hold up fine. Terry tested those 2KV 
caps up to 5700V before it failed :- o

On 8/4/05, Tesla list <<mailto:tesla@xxxxxxxxxx>tesla@xxxxxxxxxx> wrote:
Original poster: <mailto:Kidd6488@xxxxxxx>Kidd6488@xxxxxxx

I didn't see anyone else point this out; excuse me if someone
did.  But 18kV MMC is not sufficient.  The capacitors should be rated
above the peak voltage of your NST which is

SQRT(2) * NST voltage

1.414 * 15,000 = 21,210 volts.

Unless I'm wrong, your MMC should be rated at at least 22kV.  Just
trying to help save your monet ;-)

Jonathon



In a message dated 8/3/05 10:32:26 AM Eastern Daylight Time,
<mailto:tesla@xxxxxxxxxx>tesla@xxxxxxxxxx writes:
>I have a 15K/30mA NST which I am building an MMC for.
>
>capacitance of .00783mF (which is in my LTR range) and a voltage of 18,000v
>(which exceeds my NST voltage)