Capacitor Inductance

To: Chip Atkinson <chip-at-grendel.objinc-dot-com>, Jerry Biehler <jbiehler-at-teleport-dot-com>, Loren Carpenter <loren-at-pixar-dot-com>, Glenn Cerny <gcerny-at-ix-dot-netcom-dot-com>, Mark Conway <mconway-at-deepthnk.kiwi.gen.nz>, Daryl Dacko <mycrump-at-cris-dot-com>, Don Froula <froula-at-cig.mot-dot-com>, Stan Harle <lazer-at-netcom-dot-com>, David Lawrence <davidl-at-unix.ieway-dot-com>, Edward Phillips <ed-at-alumni.caltech.edu>, Richard Quick <richard.quick-at-slug-dot-org>, Steven Roys <sroys-at-radiology.ab.umd.edu>, "Mark S. Rzeszotarski" <msr7-at-po.cwru.edu>, Bob Thaden <Robert.Thaden-at-amd-dot-com>, Kristian Ukkonen <kukkonen-at-snakemail.hut.fi>, Richard Wall <rwall-at-ix-dot-netcom-dot-com>, Malcolm Watts <MALCOLM-at-directorate.wnp.ac.nz>
Subject: Capacitor Inductance
From: Scott Myers <102505.61-at-compuserve-dot-com>
Date: 07 Nov 95 10:16:16 EST
>Received: from dub-img-3-dot-compuserve-dot-com (dub-img-3-dot-compuserve-dot-com [198.4.9.3]) by uucp-1.csn-dot-net (8.6.12/8.6.12) with ESMTP id IAA21242; Tue, 7 Nov 1995 08:18:18 -0700
Cc: Tesla Group <tesla-at-grendel.objinc-dot-com>, USA-TESLA <usa-tesla-at-usa-dot-net>

I made a little mistake the other day when I quoted what the internal inductance
of these 20 KV, .025 uF Condenser Products commercial capacitors is.  I told you
that it was under 80 microhenries.  WOOPS!  I meant it was under 80 nanoHenries.

I went ahead and confirmed the internal inductance with the factory.  It will be
between 30-35 nanoHenries.  This is fully acceptable.  A nice low figure
actually.  The other companies figures were a little higher.  They others were
in at about 70-80 nanohenries.

Here was Malcom Watts' message to me.

>I posted a query in response to the figure of 80 microHenries you 
>gave on Grendel, but this matter is SO IMPORTANT that I have to
>raise it with you IMMEDIATELY.  Is this figure of 80 microHenries 
>correct ?  (not 80 nanoHenries by any chance)

>IF IT IS CORRECT, we have a MAJOR PROBLEM.  This far more 
>inductance than you will find in many tank coils. This is
>COMPLETELY UNSUITABLE FOR MY PURPOSES IF TRUE.

Sorry for the error.  Thanks for catching it Malcom.  Your right, it would be a
problem.

Scott Myers