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Re: CP cap explosion analysis
Tesla List wrote:
>
> >From froula-at-cig.mot-dot-comWed Oct 30 21:33:52 1996
> Date: Wed, 30 Oct 1996 10:07:56 -0600
> From: Don Froula <froula-at-cig.mot-dot-com>
> To: tesla-at-pupman-dot-com
> Subject: CP cap explosion analysis
>
> I received a call from Condenser Products concerning the capacitor from
> the group buy that had exploded in service. They confirmed that it was a
> manufacturing defect and will replace my unit as soon as a new one can be built
> (about 6 weeks).
>
> As can be seen from the photographs that I published on the WWW, there are four
> rolled sections within the cap. According to CP, one of the sections had
> shorted internally, causing the casing to burst. Two of the other sections had
> what the engineer called "high IR", which he interpreted to mean unacceptably
> high leakage. The implication seemed to be that there was a problem with
> either the construction or dielectric material which caused this condition.
> The fourth section was OK.
>
> He said that he would contact Scott Myers, who coordinated the original
> purchase, to discuss the situation with the remaining units.
>
> Regards,
>
> Don Froula
Don,
Thanks for the update! Do you know if they've changed any of their
incoming material testing, fabrication, or final testing procedures to
prevent this from recurring? Sonuds like the GOOD news is that their
tying to rectify the problem with their customers! Let me know when you
want to do another smoke test... :^)
Safe coilin to ya!
-- Bert --