Re: Secondary ground terminations

Subject:    Re: Secondary ground terminations
      Date: Wed, 11 Jun 1997 19:52:40 +1000
      From: Peter Electric <elekessy-at-macquarie.matra-dot-com.au>
        To: Tesla List <tesla-at-pupman-dot-com>
References: 1

Tesla List wrote:
> Subject:  Secondary ground terminations
>   Date:   Tue, 10 Jun 97 09:12:44 EDT
>   From:   Gary Lau 10-Jun-1997 0908 <lau-at-hdecad.ENET.dec-dot-com>
>     To:  tesla-at-pupman-dot-com
>     CC:  lau-at-hdecad.ENET.dec-dot-com
> I was planning on plugging the base of my sec tube with a 3/8-
> 1/2" disk of Plexiglass with a 1/4-20 threaded insert in the
> center, and gluing a second 3/8" disk above this insert to
> insulate and plug the insert hole.  The insert would be used to
> mount the secondary assy.
> Would it be reasonable to use this insert as a ground connection,
> running a thin copper strip radially outward on the base of the
> lower disk from the insert to the bottom tail of the secondary?
> Gary Lau
> Waltham, MA

I have done something similar already on my 3.5" by 22" secondary. I
have plugged the plexiglass tube with plexi disks at both ends but about
an inch into the tube. I then have another disk at the ends with 1/4 20
brass bolts and I have run the winding wire in through a small hole on
the side directly to the bolts.

I haven't had any problems with corona or breakout so far.


Peter E.