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Re: Test of 6" coil

Subject:  Re: Test of 6" coil
  Date:   Mon, 2 Jun 1997 13:24:31 -0400 (EDT)
  From:   Esondrmn-at-aol-dot-com
    To:   tesla-at-pupman-dot-com


In a message dated 97-05-30 14:17:06 EDT, you write:

<< ED:
         That must have created several interesting ah, comments when
you
 found
 that it had failed.  That's really a kick in the head to loose two of
 those.  Just for information, I received one of the CP caps, .025
 mfd.-at-20,000VAC on 12/28/95 with the 1/2-13 threaded studs which I
 believe makes it part of the first special order Scott put together.  I
 ordered direct since I joined the list just after the first order went
 out.  I have run this in my 8" coil for some pretty long runs at 450
BPS
 maximum, with no failure yet.  This year I have at most 25-30 seconds
of
 run time on it (sad to say it) with my brand new Plastic Capacitor's
.05
 mfd -at- 30,000VAC cap, running in parallel. I would be happy to give you
 an update in 2-4 weeks when I have accumulated some decent run time.  
 Just for information, the Plastic Capacitor's case is a rectangle which
 I prefer--cleaner installation.  I place my capacitor's on a 1/2" thick
 sheet of acrylic plastic, which is something CP does recommend by
 default--their case has a 10,000 VAC max rating stamped on it.  Did you
 have your cap on an extra layer of insulation?  Hope CP stands behind
it
 for you.
 
 Chuck Curran
 Cedarburg, WI
  >>
Chuck,

Thanks for the response.  Yes, I was quite bummed when I finally figured
out
that I had another bad C.P. cap.  This cap apparantely failed last year
the
first time I fired it up.  I have been thinking and inspecting all parts
since then but have been looking in the wrong place.  I wish I would
have
found this last year.  The bad part now is that the summer months are
about
the only time I can set this coil up outside and run it - and now I will
probably be down for a couple of months to get a replacement.  I talked
to
Jeffrey Fielder at C.P. and he did give me a R.A. number and said he
will
check it out.

The cap is mounted in a wooden cradle with a radius cut in each end to
fit
the dia.of the cap.  There is two layers (about 1/2" thick total) of
foam
rubber between the cap and the wood.  I don't think it shorted through
the
case or I would expect to see burn marks somewhere.

What kind of lead time did you get from Plastic Capacitors?  How do
their
prices compare?

Ed Sonderman