Re: Doorknob capacitors for primary?

["Tesla list" <tesla-at-pupman-dot-com>]

Original poster: "Harold Weiss" <hweiss-at-new.rr-dot-com> 

Hi Brent,

Those caps would most likely be good for NST filters.  I'm brain-cramping on
the reason they don't work as well for main tank caps.  I think it is
something to do with current handling ability and losses in the ceramic.
The TDK's are supposed to be the good ones for tank caps.  I know ceramic
disk caps were absolutely terrible when I built a ceramic MMC for my first
coil in 93.  Bright flash and bang, and nothing but two leads where the cap
used to be.

David E Weiss

 > Original poster: brent meyer <res095fx-at-verizon-dot-net>
 >
 > I was wondering why I don't see many coilers using ceramic "doorknob" HV
 > caps for their tanks?  Are they more prone to failure?  I just happened
upon
 > a parcel of 18  570pF 40KV caps, and I bought the lot of them. I'll be
 > running them on a 15KV 60 NST.   I'm looking to build a bipolar coil using
a
 > nice pair of  5 1/4 by 31 inch long fiberglass coil forms I just found,
and
 > was wondering if I should have to incorporate some kind of blast shields
 > into the designS
 >
 >
 >