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Re: MMC Survivability

Original poster: "Barton B. Anderson" <bartb@xxxxxxxxxxxxxxxx>

Hi Jim,

I suspect it will perform great! The voltage standoff capability is low, but these are MMC's. If you are running in a healthy LTR mode, you would be fine. However, 0.1uF is not a healthy LTR mode for your pig. It's kind of near the static gap LTR value. I suspect you'll be using an RSG of some type. You will be on the ragged edge of "ok" and "slightly possible to overvolt a cap" (which I have done with MMC's). Considering the "costs" your looking at, another $100 could be good insurance.

If you were me however, you wouldn't spend the extra cash. You would try to get away with the minimum caps required. After all, when a cap blows, it won't be a $500 nightmare. It will be a $3 setback. That's what is nice about MMC's. If you do this right, you won't need a professional pulse cap, but doing it right doesn't have to be perfect the 1st time round. At little costs, you can simply add caps to the strings as necessary. I eventually ended up with an 18 string cap bank, but only after blowing up a 15 string (only 1 cap died, so no big deal. And that is the coolness of MMC's)!

BTW, I run both MMC and Professional Polystyrene pulse caps. They both perform well. I can't really see a difference between the two from a performance basis. But when it comes to cost, MMC's are always the winner. Not always up front cost, but certainly maintenance cost.

Take care,

Tesla list wrote:

Original poster: "Jim Mora" <jmora@xxxxxxxxxxx>

Hello all,

I?m building a 12? coil powered by a 5KVA 14.4kv (pushed a bit). I had hoped to buy one of Dr R?s Maxwell super caps but the buy won?t go through until next spring.

What do you think the survivability of 10 rows (.1uf) of CD942C .15uf, 2000kv x 15 strings and a 200 BPS ASRG will be, since I have that many?

Thanks, I suspect it would be on the edge?

Jim Mora