Re: 42l OH NO!!

["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>

I was running 24 in series for 28.8kv.  One would think that is plenty of 
margin.  Im sick of these 1200v caps, and i dont want to risk dealing with 
42ls if i can.  Soooo, i bought some CD caps from Richardson.  I bought the 
.22uf at 1600v  942C16P22K.  My large coil(15/120) will use 2 strings of 15 
or 16 (yet to be determined).  The MMC calculator says ;)) to these so i 
think im ok.   They have good RMS and Peak currents.  My medium coil (12/60) 
will use either 14 or 15 in series, only one string, but like i said, good 
current ratings.  So I spent another $100 on caps.  This time, they wont 
break!  By the way, i wanted geek caps, but i couldnt find anything on the 
website (the new one), and i checked the CD inventory on the CD site, and 
they didnt even have any in stock, so i went with these at only $1.93 a pop, 
not bad.

I still think that its just these 1200v caps and not the 2000 & 3000v ones.

Steve Ward.

PS, Dan, when are you gonna get some spark pics up on your site.  I want to 
see them.  You dont even have a pic of your completed 15/60 coil!!  I guess 
i cant talk since i dont even have a web site.


>From: "Tesla list" <tesla-at-pupman-dot-com>
>To: tesla-at-pupman-dot-com
>Subject: Re: 42l  OH NO!!
>Date: Sat, 21 Sep 2002 15:47:53 -0600
>
>Original poster: "by way of Terry Fritz <twftesla-at-qwest-dot-net>" 
><dhmccauley-at-spacecatlighting-dot-com>
>
>Seems like you're the only one having problems with this.  How many do you
>have in series???  I've been running my 42L series MMCs for up to 30 
>minutes
>at a time and the caps are just barely warm to the touch.
>
>Dan
>
>
>
> > Well all good things, that seem to turn around from bad things to be 
>good
> > things, must come to an end.  A few weeks ago i reported that my 1200v
>.33uf
> > ge caps were overheating.  But my .68uf 1200v caps still seemed to have
> > hope.
> >
> > NOPE!!
> >
> > Tonight i ran my large coil again, and checked the caps.  5 are
> > overheating!!!  So i really did spend $170 in bad caps!  Oh sure, they
>will
> > seem ok when you have enough in series, but my experience has told me 
>that
> > they will all fail at a very young age, about 15 minutes of total run 
>time
> > if that!  Might be only like 5-6 minutes.  So Terry or Scott Hanson, 
>maybe
>i
> > will have some mice big caps for you to analyze if you want.  But then
> > again, i have about $.02 left, so im not sure if i can afford the
>shipping.
> > This is really depressing....
> >
> > Steve Ward.
> >
> > PS, are the 2000v and 3000v 42ls good? maybe they are. perhaps only the
> > 1200v are junk.  that seems to be my luck lately...  Teslathon was 
>looking
> > like a good time too.
> >