# Re: [TCML] (no subject)

```On 5/16/13 7:38 AM, Matthew Hebb wrote:
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```i need to design a mmc capactor for the solid state, find the
resonent frequency of the secondary with and without the torrid find
the frequency of the primary and tune it to the secondary and then
order the kit from eastern voltage reasearch and built it... its
gunna be alot of work mainly im looking for advice and how to
calculate theese things

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Do people use MMC for solid state? I thought the primary voltage is low enough that you don't do that.. anyway..
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MMC design is a matter of figuring out which series parallel combination of off the shelf caps gets you closest..
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Look up the Cornell-Dubilier (CDE) 942C series capacitor. they're available in various voltages.. 1, 1.2, 1.6, 2kV (I think) and various capacitances (.1 uF, .15uF)
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depending on where you buy, how brave you are, etc.

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If you need, say, a 16 kV capacitor, you could either string together 16 1kV caps or 10 1.6kV caps or 8 2kV caps. (or if you're brave, run them over their rated voltage...)
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That gives you 1/16th, 1/10th, or 1/8th of the capacitance of cap in series. You need to figure out how many parallel strings you need to get the capacitance you want.
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The "easy" way is to build a spreadsheet of # of caps vs size/voltage, and then look up the prices and figure out what the cheapest way to go is.
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Resonant frequencies are best calculated using a tool like Java TC. Or even Ed Sonderman's old tesla.xls file that uses Wheeler equation for L and Medhurst for C. You probably don't need gnats eyelash precision at first.
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Yes, it *is* a lot of work.
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