Secondary ground terminations

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

Thanks to all who replied to my Pri/Sec spacing question.

I've just completed the winding of my secondary and have to deal
with terminating the ends before I can coat the coil.  I have
read the R. Quick documents suggesting terminating the bottom of
the secondary with a flush-mounted copper plate just below the
bottom winding on the sec. tube, and attaching the earth ground
connection to this plate using a rubber band.  While I can
appreciate the durability and low corona discharge qualities of
this approach, the integrity of the connection seems marginal
when compared with the efforts one should make in providing a low
impedance ground path.

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