Re: Cap Identification

to: Malcolm

The company is Film Capacitors, Inc., formerly of Passiac, NJ.  There was a
large fire in this town 9 years ago that burned down 4 city blocks --
including their company.  They did not rebuild and are out of business.

The KM stands for Kraft paper / Mylar construction.  The dissapation factor
at Tesla frequencies is horrible.  They will only work as their intended
application -- DC filter caps.



-----Original Message-----
From: Tesla List <tesla-at-pupman-dot-com>
To: tesla-at-pupman-dot-com <tesla-at-pupman-dot-com>
Date: Thursday, June 10, 1999 4:04 PM
Subject: Cap Identification

>Original Poster: "Malcolm Watts" <malcolm.watts-at-wnp.ac.nz>
>Hi all,
>        Would someone help me please? I would like some data on a
>capacitor with the following legends stamped on the case.
>The case: blue plastic, axial leads, translucent end filler.
>The legends exactly as they are stamped on the case:
>          F-C-I
>        KM9-125-2
>   .002MFD- 12.5KVDC
>        11M/81
>The capacitance and working voltage is obvious. The last legend
>implies a date of manufacture. These caps were wired in a series
>string with a 1k composition resistor between each and a 200 MOhm
>thin or thick film resistor bridging each. I know it was intended for
>some kind of use in a 120kV supply which used a bundle of flyback
>transformers. I also have two strings of the same type of cap rated
>at 0.015uF at 15kVDC.
>What kind of capacitor have I got?
>Thanks in advance,