Re: MMC resister problem

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

Original poster: "Steven Ward by way of Terry Fritz <twftesla-at-qwest-dot-net>" <srward16-at-hotmail-dot-com>




>From: "Tesla list" <tesla-at-pupman-dot-com>
>To: tesla-at-pupman-dot-com
>Subject: MMC resister problem
>Date: Sun, 02 Jun 2002 12:31:50 -0600
>
>Original poster: "Steven Ward by way of Terry Fritz <twftesla-at-qwest-dot-net>" 
><srward16-at-hotmail-dot-com>
>
>Hi everyone,
>
>My friends large coil project has been having problems with the cap and im
>hoping someone could give me an answer.  Here are the specs for his MMC 
>cap:
>
>caps are green Russian military caps.  .0047uf-at- 16kvdc each.  We wired them
>into strings of 3 in series, with 30 strings in parallel.  Thats a lot of
>caps!!
>
>Now we only have a single 10meg ohm resister across each cap, and the
>problem is that these cheap radioshack resisters are starting to arc 
>between
>the leads.  I have a feeling that its because 1) they are not rated for HV
>and 2) we only have 3 caps in series, so its alot easier for it to arc
>across 3 resisters, rather than the 7-10 that a normal MMC would have.
>
>So...  would i be able to fix this by putting 2 resisters across each cap??
>or would we need more like 3 on each cap?
>
>Any other suggestions are welcome.
>
>Steve Ward.
>


Sorry, i forgot to mention that the PSU is a 12kv 120 ma, bank of 2 NST's.

Steve Ward.