From: Vivian [SMTP:V.C.Watts-at-btinternet-dot-com]
Sent: Tuesday, June 16, 1998 6:14 PM
To: Tesla List
Subject: Strike Rail
As I am expecting to give a demo of my coil to a few friend this weekend
I decided to clean it up. The copper pipe had become corroded by
finger prints and the like. So I cleaned it all up and while I was at it I
tidied the plumbing to the strike rail. Well having put it back together
fired it up, DISASTER. Sparks shooting of the secondary and between
windings (8" in the middle). So I checked all connections but nothing was
The strike rail is 10mm copper pipe and mounted at the outer most
diameter and about 2" above the primary
(See http://www-dot-netcomuk.co.uk/~wwl/uktesla.html perspex masterpiece).
The strike rail is not a complete turn with about 2" gap to avoid shorted
I changed it from the picture. This time my plumbing came up to the rail
via a nice curve then fitted into a right angle joint (running
horizontally). I concluded it could only be due to this. So instead of the
right angle pipe joint I curved it with a radius of about 3". Now the
problem has gone away.
The reason for passing on this info is that I know some people have suffered
from breakout in the middle of the secondary but I do not recall any mention
of strike rail geometry's as possible problems.
Viv Watts UK.