Original poster: "Steve Ward" <steve.ward@xxxxxxxxx> Is it possible to get a picture? If it has those big flange connections on either end (usually with 2 bolt holes) then its probably mica. Mica's typically also have a RMS current rating (often rated at various frequencies). I do have other mica caps that dont fit this description as well, so they do come in other varieties. As mentioned, they are usually quite large for their ratings. I have a 3nF 10kV unit thats about 4" diameter and 4" tall. I also have some 10nF 10kV caps, again about 4" diameter and about 6" tall. They are all rated around 10-15A RMS at 200khz (so quite beefy for your average tube coil, keeping in mind the Q of the primary circuit is still around 10 or so). Steve Ward On 1/17/07, Tesla list <tesla@xxxxxxxxxx> wrote:
Original poster: "Jonathan Peakall" <jpeakall@xxxxxxxxxxxx> Hi All, I've been watching the mica cap thread for VTTC's. I have the tubes, and I'm wondering if these caps I have are mica and/or would work for VTTC use. The caps look like the ones at NSS linked in that thread. The are cylinders, appear to be ceramic (not glass, like the glassmike caps) and are marked as follows: F-C-I D6-200-20 .02mF 20kVDC AXEL T103L1 12.5kV Any idea what kind these are? I also have a lot of glass caps, are these any good for VTTC's? I know of their problems for regular disruptive coils. It would be sweet if I could use any of these caps, as then I would have all of the expensive components. Thanks! Jonathan www.madlabs.info