The problem with most professional caps for Tesla coils is their efficiency. Most capacitors are very lossy at high frequencies, so it is difficult to find ones that will work properly. Again, I don't really have much experience with MMCs, but other members here might. I'm just as eager to get an answer as you arehttp://www.ebay.com/sch/i.html?_nkw=high+voltage+capacitors+30kv&_sacat=4662&_odkw=high+voltage+capacitors+20kv&_ipg=50&LH_BIN=1&_sop=15&_osacat=4662&_from=R40
im using a 15kv transformer so peak is about 22kv. i can buy a few 30kv caps and put them in parallel to reach my goal of 8.6nF
If you're building an AC-powered tesla coil, these DC caps will not work. They are intended for DC and may explode if high voltage AC was applied to them. you could, however, switch your TC over to DC, but it would require a few extras (like high-voltage rectifiers).how about these? i can make an MMC. they are only rated for DC there is no AC rating for them? i can afford these.
this is the data sheet for them:
so, your pretty sure with a good deal of certainty that they will work? i can order 16 for bout 40$ to make a MMC with a DC rating of 30kvdc 8.8nF. im using 15kv transformer so peak AC is about 22kvMetallized polyester caps aren't polarized, they aren't constructed like electrolytics. The dielectric's a layer of plastic film, not an oxide, and it works both ways. Note that there's no polarization, even in the spec sheet. Yes, it says "kVdc" on it, but that's just the dc rating.
Unfortunately, the AC voltage rating is always less than the dc voltage rating on poly caps, and usually by quite a bit. http://www.electro-tech-online.com/custompdfs/2011/11/ABD0000PE111-1.pdf
Are you sure it was this thread? There was another similar thread that came up recently....
I just checked, there were no spammer posts or anything that would have triggered a notification. Also, how'd you end up in 2024? I'm still back here in 2017!