Subject: Formless Seconday
Date: Sat, 17 Feb 96 04:22:00 UTC 0000
>Received: from relay1.geis-dot-com (relay1.geis-dot-com [18.104.22.168]) by uucp-1.csn-dot-net (8.6.12/8.6.12) with ESMTP id VAA24454 for <tesla-at-grendel.objinc-dot-com>; Fri, 16 Feb 1996 21:29:31 -0700
>I have just finished building a couple of scaled down versions of a tesla
>coil secondary. I used a cardboard tube covered with a couple layers of
>I am now pondering the attachment of the torroid and base.
>I was thinking of epoxying something to the top and bottom. Instead of
>cutting out a section of the bottom for gnd attachment, maybe incorporating
>something as I am coating. Still thinking on this. I also am considering
>maybe just running a 4 small dia acrylic rods inside the tube, epoxyed the
>length, from top to bottom.
When one buys a commercial air core inductor of large size, it's wound on 4
polyethylene ribs and melted into the outer edge of the plastic. This
contributes to a few degrees of arc filled with a "lossy" plastic instead of
the full 360 degrees. So, consider fewer layers of lacquere/epoxy and ribs
glued inside for support. This will reduce the disapative material volumn
and provide the strength you need for mounting and bumping.