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Re: MMC caps
Jason, Digikey has a fairly large selection of PP caps. They are
high-voltage panasonics. They come in 1250 and 1600V ratings. I don't
remember the exact range, but two combos I KNOW they have are
1250V/0.068uF and 1600/0.056. I know our list moderator Terry loves the
1600/0.056's :P , but if you work out the voltage/capacitance over price
ratios, the 1250/0.068 is generally more cost effective. I've used the
1600/0.056's with a 12/60 for many hours with no problems and the
1250/0.068's in my current coil of 15/180 with no problems.
Also, check out my "MMC Helper" at http://tesla.better-dot-org/mmc_form.cfm
. You punch in some values and it gives you a huge table of
possibilities.
http://www.digikey-dot-com
-Stan
Tesla List wrote:
>
> Original Poster: Raycroft <k.raycroft-at-worldnet.att-dot-net>
>
> Hi all;
>
> After messing (literally) with salt water and about 5 different
> varieties of plate caps, I have decided that it is in the best interest
> of my sanity to go to an MMC. Right now, I'm running a 15/30 NST so I
> only need about .005 uF. Here's what I'm thinkin:
>
> 15000*1.5=22500 peak to peak +some extra.
> 22.5KV / 1.5 KV(rated dc)=15 caps. I'd like several strings between
> .0025 and .005, for future expansion.
>
> tot.cap *number = value of each cap
> .0025 *15 =.0375 uf \
> -- anywhere in this range should be good?
> .005 *15 =.075 uf /
>
> The big question. Where can I find 100 (I'd like some extras for EMMC
> testing) 1.5KVDC Polypropylene caps rated between .0375 and .075 uF in
> the United States? (I wish I was on the other side so I could have taken
> part in the "UK bulk buy")
>
> Thank you very much,
> Jason Raycroft